PHA Flora Report

Sunday 10/02/2022

This is our first abridged draft of the Flora of Dukes County, which will form the backbone of a more detailed, extensive hard-copy publication. We hope to maintain this digital version of the Flora as an iterative, living document that reflects the dynamic nature of our landscape, to be updated annually as new taxa are observed, taxonomy shifts, and conservation statuses change. Future iterations of this list will include habitat information, more extensive taxonomic notes, and other data.

Taxa with occurrences verified by physical plant vouchers will list "PHARB" or "CNH" in the righthand column. The code "PHARB" indicates there is a voucher in the Polly Hill Arboretum Herbarium; the code "CNH" indicates a voucher does not exist at PHARB, but can be found at a member institution of the Consortium of Northeast Herbaria. The complete absence of a code indicates there is no verifiable physical record of a taxon's occurrence, and that its inclusion in the Flora is based only on the trusted observation of a credible source.

Any taxa which have not been observed since the year 2000 are considered to be of "historic" status.

Collector's initials:
EH: Erin Hepfner
EL: Elizabeth Loucks
ET: Elizabeth Thomas
GP: Gregory Palermo
JR: Julie Russell
KF: Kristen Fauteux
MC: Margaret Curtin
MDC: Melissa Dow Cullina
TB: Timothy Boland

For a complete key to this document, please refer to the "The Flora of Dukes County" page on the Polly Hill Arboretum website.


Lycopodiaceae


Dendrolycopodium hickeyi  (W.H. Wagner, Beitel, & Moran) A. Haines
[Lycopodium hickeyi  W.H. Wagner, Beitel, & Moran]
Hickey's Tree-clubmoss
County Record (GP #17-168)
Native
Rare
PHARB

Dendrolycopodium obscurum  (L.) A. Haines
[Lycopodium obscurum  L.]
Ground or Princess Pine
Native
Rare
PHARB

Diphasiastrum digitatum  (Dill. ex A. Braun) Holub
[Lycopodium complanatum  var.  flabelliforme  Fern.]
Southern Ground Cedar, Fan Clubmoss
Native
Historic
PHARB

Diphasiastrum tristachyum  (Pursh) Holub
[Lycopodium tristachyum  Pursh]
Slender or Wiry Ground Cedar
Native
Historic
CNH

Huperzia lucidula  (Michaux) Trev.
[Lycopodium lucidulum  Michaux]
Shining Clubmoss
Native
Unknown

Lycopodiella appressa  (Chapman) Cranfill
[Lycopodium appressum  (Chapman) Lloyd & Underwood]
Southern or Bog Clubmoss
Native
Rare
PHARB

Lycopodiella inundata  (L.) Holub
[Lycopodium inundatum  L.]
Northern Bog Clubmoss
Native
Historic
CNH

Lycopodium clavatum  L.
Common Clubmoss
Native
Historic
PHARB


Isoetaceae


Isoetes acadiensis  Kott
Acadian Quillwort
County Record (GP #20-226)
Native
Rare
PHARB

Isoetes tuckermanii  A. Br. ex Engelm.
Tuckerman's Quillwort
Native
Historic
CNH


Ophioglossaceae


Botrychium dissectum  Sprengel
[Botrychium dissectum  var.  obliquum  (Muhl. ex Willd.)]
Cut-leaved Grapefern
Native
Rare
CNH

Botrychium multifidum  (Gmelin) Rupr.
[Botrychium multifidum  var.  intermedium  (D.C. Eaton)]
Leathery Grapefern
Native
Historic
PHARB

Botrychium oneidense  (Gilbert) House
Blunt-lobed Grapefern
Native
Historic
CNH

Ophioglossum pusillum  Raf.
[Ophioglossum vulgatum  var.  pseudopodum  (Blake) Farw.]
Adder's Tongue Fern
Native, Threatened
Historic
CNH


Equisetaceae


Equisetum arvense  L.
Common Horsetail
Native
Occasional
PHARB


Osmundaceae


Osmunda claytoniana  L.
Interrupted Fern
Native
Rare
PHARB

Osmunda regalis  var.  spectabilis  (Willd.) Gray
Royal Fern
Native
Occasional
PHARB

Osmundasterum cinnamomea  L. C. Presl
[Osmunda cinnamomea  L.]
Cinnamon Fern
Native
Common
PHARB


Dennstaedtiaceae


Dennstaedtia punctilobula  (Michaux) T. Moore
Hay-scented Fern
Native
Abundant
PHARB

Pteridium aquilinum  ssp.  latiusculum  (Desv.) Hultén
Bracken Fern
Native
Common
PHARB

Pteridium aquilinum  ssp.  pseudocaudatum  (Clute) Hultén
Pine Barrens Bracken Fern
Native, Watch List
Uncommon
PHARB


Aspleniaceae


Asplenium platyneuron  (L.) B.S.P.
Ebony Spleenwort
Native
Uncommon
PHARB


Woodsiaceae


Athyrium angustum  (Willd.) C. Presl.
[Athyrium filix-femina  var.  angustum  (Willd.) Lawson]
Northern Lady Fern
Native
Common
PHARB

Athyrium asplenioides  (Michx.) Desv.
[Athyrium filix-femina  var.  asplenioides  (Michaux) Farw.]
Southern Lady Fern
Native, Watch List
Historic
PHARB


Thelypteridaceae


Parathelypteris noveboracensis  (L.) Nieuwl.
[Thelypteris noveboracensis  (L.) Nieuwl.]
New York Fern
Native
Common
PHARB

Parathelypteris simulata  (Davenport) Holttum
[Thelypteris simulata  (Davenp.) Nieuwl.]
Massachusetts Fern
Native
Occasional
PHARB

Phegopteris connectilis  (Michaux) Watt
[Thelypteris phegopteris  (L.) Slosson]
Northern or Narrow Beech Fern
Native
Rare
PHARB

Thelypteris palustris  var.  pubescens  (Lawson) Fern.
Marsh Fern
Native
Common
PHARB


Blechnaceae


Woodwardia areolata  (L.) T. Moore
[Lorinseria areolata  (L.) Presl.]
Netted Chain Fern
Native
Common
PHARB

Woodwardia virginica  (L.) Smith
Virgina Chain Fern
Native
Uncommon
PHARB


Onocleaceae


Onoclea sensibilis  L.
Sensitive Fern
Native
Common
PHARB


Dryopteridaceae


Dryopteris ×boottii  (Tuckerman) Underw.
[Dryopteris cristata  ×  D. intermedia]
Boott's Wood Fern
Native
Unknown
PHARB

Dryopteris ×triploidea  Wherry
Fruitful Wood Fern
County Record (GP #20-184)
Native
Rare
PHARB

Dryopteris ×uliginosa  (A. Br. ex Dowell) Druce
[Dryopteris carthusiana  ×  D. cristata]
Swamp Wood Fern
Native
Historic

Dryopteris carthusiana  (Vill.) H.P. Fuchs
[Dryopteris spinulosa  (O.F. Muell.) Watt]
Spinulose Wood Fern
Native
Occasional
PHARB

Dryopteris cristata  (L.) A. Gray
Crested Wood Fern
Native
Uncommon
PHARB

Dryopteris intermedia  (Muhl. ex Willd.) Gray
Evergreen Wood Fern
County Record (NB #199)
Native
Occasional
PHARB

Dryopteris marginalis  (L.) A. Gray
Marginal Wood Fern
Native
Rare
PHARB

Polystichum acrostichoides  (Michaux) Schott
Christmas Fern
Native
Rare
PHARB


Polypodiaceae


Polypodium virginianum  L.
Common Polypody
Native
Rare
PHARB


Pinaceae


Larix decidua  P. Miller
European Larch
Introduced
Rare
PHARB

Picea abies  (L.) Karsten
Norway Spruce
Introduced
Uncommon
PHARB

Picea glauca  (Moench) Voss
White Spruce
Introduced
Common
PHARB

Pinus banksiana  Lamb.
Jack Pine
Introduced
Unknown

Pinus resinosa  Aiton
Red Pine
Introduced
Uncommon

Pinus rigida  Miller
Pitch Pine
Native
Abundant
PHARB

Pinus strobus  L.
White Pine
Introduced
Common
CNH

Pinus sylvestris  L.
Scotch Pine
Introduced
Uncommon
PHARB

Pinus thunbergii  Parl.
[Pinus thunbergiana  Franco]
Japanese Black Pine
County Record (GP #20-283)
Introduced
Uncommon
PHARB


Cupressaceae


Chamaecyparis thyoides  (L.) B.S.P.
Atlantic White Cedar
Native
Rare
PHARB

Juniperus communis  var.  depressa  Pursh
Common or Pasture Cedar
Introduced
Occasional
PHARB

Juniperus virginiana  var.  virginiana  L.
Eastern Red Cedar
Introduced
Abundant
PHARB

Thuja occidentalis  L.
Arbor Vitae, Northern Red Cedar
Introduced
Rare
PHARB


Nymphaeaceae


Brasenia schreberi  J.F. Gmelin
Water Shield
Native
Rare
PHARB

Nuphar variegata  Durand ex Clinton
Spatterdock, Yellow Water-lily
Native
Rare
PHARB

Nymphaea odorata  Aiton
[Nymphaea odorata  var.  gigantea  Tricker]
Spatterdock, Yellow Water-lily
Native
Occasional
PHARB


Aristolochiaceae


Isotrema macrophylla
Large-leaved Dutchman's Pipe
County Record (GP #17-10)
Introduced
Rare
PHARB


Calycanthaceae


Calycanthus floridus  var.  floridus  L.
Eastern Sweetshrub
Introduced
Waif


Lauraceae


Lindera benzoin  (L.) Blume
Spicebush
Native
Occasional
PHARB

Sassafras albidum  (Nutt.) Nees
[Sassafras albidum  var.  molle  (Raf.) Fern.]
Sassafras
Native
Common
PHARB


Acoraceae


Acorus americanus  (Raf.) Raf.
[Acorus calamus  var.  americanus  Raf.]
Sweetflag
Native
Historic
CNH

Acorus calamus  L.
Single-veined Sweetflag
Introduced
Historic
CNH


Araceae


Arisaema triphyllum  ssp.  pusillum  (Peck) Huttleston
[Arisaema pusillum  (Peck) Nash]
Dwarf Jack-in-the-Pulpit
Native
Historic
CNH

Arisaema triphyllum  ssp.  stewardsonii  (Britton) Huttleston
[Arisaema stewardsonii  Britton]
Swamp Jack-in-the-Pulpit
Native
Rare
PHARB

Arisaema triphyllum  ssp.  triphyllum  (L.) Schott ex Schott & Endl.
[Arisaema atrorubens  (Aiton) Blume]
Woodland Jack-in-the-Pulpit
Native
Occasional
PHARB

Lemna minor  L.
Duckweed
Native
Common
PHARB

Lemna minuta  Kunth
Least Duckweed
Introduced
Rare
PHARB

Peltandra virginica  (L.) Schott ex Schott & Endl.
Arrow Arum
Native
Historic
PHARB

Spirodela polyrrhiza  (L.) Schleiden
Greater Duckweed
Native
Rare
PHARB

Symplocarpus foetidus  (L.) Salisb. ex Nutt.
Skunk Cabbage
Native
Common
PHARB

Wolffia borealis  (Engelm. ex Hegelm.) Landolt
[Wolffia punctata  auct. non Griseb.]
Northern Water-meal
County record (MDC 2010)
Native, Watch List
Rare

Wolffia brasiliensis  Weddell
[Bruniera punctata  (Griseb.) Nieuwl.]
Brazilian Water-meal
County record (GP #18-167)
Native
Rare
PHARB


Hydrocharitaceae


Najas flexilis  (Willd.) Rostk. & Schmidt
Common Waternymph
Native
Historic
CNH

Najas gracillima  (A. Braun) Magnus
Slender Waternymph
Previously historic, re-established in 2009 (MDC #1715)
Native
Rare
PHARB

Najas guadalupensis  ssp.  guadalupensis  (Spreng.) Magnus
Guadalupe Waternymph
Native
Occasional
PHARB

Najas guadalupensis  ssp.  olivacea  (Rosend. & Butters) Haynes
Guadalupe Waternymph
County Record (GP #20-195)
Native
Occasional
PHARB

Vallisneria americana  Michaux
Tape Grass, Wild Celery
Native
Uncommon
PHARB


Alismataceae


Alisma subcordatum  Raf.
Southern Water-plantain
County Record (GP #21-82)
Native
Rare
PHARB

Alisma triviale  Pursh
Northern Water-plantain
County Record (GP #18-120)
Native
Rare
PHARB

Sagittaria engelmanniana  J.G. Small
Engelmann's Arrowhead
Native
Historic
CNH

Sagittaria graminea  Michaux
Grass-leaf Arrowhead
Introduced
Rare
PHARB

Sagittaria latifolia  Willd.
[Sagittaria latifolia  var.  obtusa  (Muhl.) Wieg.]
Common Arrowhead, Duck Potato
Native
Rare
PHARB

Sagittaria teres  S. Watson
Pondshore or Quill-leaved Arrowhead
Native, Special Concern
Unknown


Juncaginaceae


Triglochin maritima  L.
Saltmarsh Arrow-grass
Native
Historic
CNH


Ruppiaceae


Ruppia maritima  L.
Ditch Grass, Widgeon Grass
Native
Occasional
PHARB


Zosteraceae


Zostera marina  L.
Eel-grass
Native
Occasional
PHARB


Potamogetonaceae


Potamogeton berchtoldii  Fieber
[Potamogeton pusillus  var.  tenuissimus  Mert. & Koch]
Slender Tiny Pondweed
Native
Occasional
PHARB

Potamogeton bicupulatus  Fern.
[Potamogeton capillaceus  Poiret]
Hairlike Pondweed
Native
Rare
PHARB

Potamogeton epihydrus  Raf.
[Potamogeton epihydrus  var.  ramosus  (Peck) House]
Ribbon-leaf or Surface Pondweed
Native
Common
PHARB

Potamogeton foliosus  ssp.  foliosus  Raf.
Leafy Pondweed
Native
Historic

Potamogeton gramineus  L.
[Potamogeton gramineus  var.  maximus  Morong]
Grass-leaf Pondweed
Native
Unknown

Potamogeton natans  L.
Floating Pondweed
Native
Unknown

Potamogeton oakesianus  Robbins
Oakes' Pondweed
Native
Rare
PHARB

Potamogeton perfoliatus  L.
[Potamogeton perfoliatus  var.  bupleuroides  (Fern.) Farw.]
Clasping Pondweed, Redhead Grass
Native
Occasional
PHARB

Potamogeton pulcher  Tuckerman
Spotted Pondweed
Native
Historic
PHARB

Potamogeton pusillus  L.
Tiny Pondweed
Native
Rare
PHARB

Stuckenia pectinata  (L.) Börner
Sago False Pondweed
Native
Rare
PHARB

Zannichellia palustris  L.
[Zannichellia palustris  major  (Hartman) W.D.J. Koch]
Horned Pondweed
Native
Rare
PHARB


Nartheciaceae


Aletris farinosa  L.
Colicroot
Native, Watch List
Occasional
PHARB


Colchicaceae


Uvularia sessilifolia  L.
Little Merrybells, Wild Oats
Native
Occasional
PHARB


Smilacaceae


Smilax glauca  Walt.
[Smilax glauca  var.  leurophylla  Blake]
Sawbrier
Native
Occasional
PHARB

Smilax herbacea  L.
Carrion-flower, Jacob's Ladder
Native
Uncommon
PHARB

Smilax rotundifolia  L.
Common Greenbrier, Catbrier, Bullbrier
Native
abundant
PHARB


Liliaceae


Lilium lancifolium  Thunb.
Lance-leaved Tiger Lily
County Record (GP #16-104)
Introduced
Rare
PHARB

Lilium philadelphicum  L.
Wood Lily
Native
Uncommon
PHARB

Lilium superbum  L.
Turk's Cap Lily
Native
Rare
CNH

Medeola virginiana  L.
Indian Cucumber Root
Native
Uncommon
PHARB


Orchidaceae


Arethusa bulbosa  L.
Arethusa, Dragon's Mouth
Native, Threatened
Rare
PHARB

Calopogon tuberosus  (L.) B.S.P.
Grass-pink
Native, Watch List
Rare
PHARB

Corallorhiza maculata  (Raf.) Raf.
Spotted Coralroot
Native
Historic
CNH

Cypripedium acaule  Aiton
Pink Lady's Slipper, Moccasin-flower
Native
Common
PHARB

Epipactis helleborine  (L.) Crantz
Helleborine
Introduced
Common
PHARB

Goodyera pubescens  (Willd.) R. Br.
Downy Rattlesnake Plantain
Native
Rare
PHARB

Isotria verticillata  (Willd.) Raf.
Large Whorled Pogonia
Native, Watch List
Unknown
CNH

Liparis loeselii  (L.) L. C. Rich.
Loesel's or Green Twayblade, Fen Orchid
Native, Watch List
Historic

Malaxis bayardii  Fern.
Bayard's Adder's Mouth
Native, Endangered
Rare

Malaxis unifolia  Michaux
Green Adder's Mouth
Native, Threatened
Unknown

Neottia bifolia  (Wieg.) Szlach.
[Listera australis  Lindl.]
Southern Twayblade
Native, Threatened
Rare

Platanthera blephariglottis  var.  blephariglottis  (Willd.) Lindley
[Habenaria blephariglottis  (Willd.) Hooker]
White-fringed Orchis
Native, Watch List
Rare

Platanthera clavellata  (Michaux) Luer
[Habenaria clavellata  (Michaux) Sprengel]
Clubspur Orchis
Native
Uncommon
PHARB

Platanthera flava  var.  herbiola  (R. Br.) Luer
[Habenaria flava  var.  herbiola  (R. Ames & Correll]
Pale-green or Tubercled Orchis
Native, Threatened
Unknown

Platanthera grandiflora  (Bigelow) Lindley
[Habenaria fimbriata  (Aiton R.) Br.]
Large Purple-fringed Orchis
Native, Watch List
Historic

Platanthera lacera  (Michaux) G. Don
[Habenaria lacera  (Michaux) Lodd.]
Ragged-fringed Orchis
Native
Occasional
PHARB

Platanthera orbiculata  (Pursh) Lindley
[Habenaria orbiculata  (Pursh) Torrey]
Round-leaved Orchis
Native, Watch List
Unknown

Platanthera psycodes  (L.) Lindley
[Habenaria psycodes  (L.) Sprengel]
Small Purple-fringed Orchis
Native
Unknown

Pogonia ophioglossoides  (L.) Ker-Gawler
Rose Pogonia, Snakemouth
Native
Rare
PHARB

Spiranthes cernua  (L.) L. C. Rich.
Nodding Ladies' Tresses
Native
Occasional
PHARB

Spiranthes lacera  var.  gracilis  (Bigelow) Luer
[Spiranthes gracilis  (Bigelow) Beck]
Southern Slender Ladies' Tresses
Native
Uncommon
PHARB

Spiranthes lacera  var.  lacera  (Raf.) Raf.
Northern Slender Ladies' Tresses
Native
Uncommon
PHARB

Spiranthes tuberosa  Raf.
[Spiranthes tuberosa  var.  grayi  (Ames) Fern.]
Little Ladies' Tresses
Native, Watch List
Occasional
PHARB

Spiranthes vernalis  Engelm. & A. Gray
Spring or Early Ladies' Tresses
Native, Threatened
Uncommon
PHARB

Spiranthes ochroleuca  (Rydb.) Rydb.
Yellow Ladies' Tresses
County Record (EL 2021)
Native
Rare

Tipularia discolor  (Pursh) Nutt.
Cranefly Orchid
Native, Endangered
Rare
PHARB


Hypoxidaceae


Hypoxis hirsuta  (L.) Cov.
Yellow Stargrass
Native
Occasional
PHARB


Iridaceae


Iris prismatica  Pursh
Slender Blue Flag
Native, Watch List
Uncommon
PHARB

Iris pseudacorus  L.
Yellow Iris, Water-flag
Introduced, Invasive
Occasional
PHARB

Iris versicolor  L.
Northern Blue Flag
Native
Common
PHARB

Sisyrinchium angustifolium  P. Miller
[Sisyrinchium bermudiana  L.]
Stout Blue-eyed Grass
Native
Occasional
PHARB

Sisyrinchium atlanticum  Bicknell
Eastern Blue-eyed Grass
Native
Occasional
PHARB

Sisyrinchium fuscatum  Bicknell
[Sisyrinchium arenicola  Bicknell]
Sandplain Blue-eyed Grass
Native, Special Concern
Occasional
PHARB

Sisyrinchium montanum  var.  crebrum  Fern.
Meadow Blue-eyed Grass
Native
Occasional
PHARB


Amaryllidaceae


Allium sativum  L.
Garlic
Introduced
Historic
CNH

Allium vineale  L.
Field Garlic, Scallion
Introduced
Common
PHARB

Galanthus nivalis  L.
Snow-drop
County Record (GP #17-02)
Introduced
Rare
PHARB


Hemerocallidaceae


Hemerocallis fulva  (L.) L.
Day-Lily
County Record (GP #17-47)
Introduced
Rare
PHARB


Amaryllidaceae


Narcissus poeticus  L.
Poet's Daffodil
County Record (GP #21-07)
Introduced
PHARB

Narcissus pseudonarcissus  L.
Wild Daffodil
Introduced
Occasional
PHARB


Hyacinthaceae


Chionodoxa forbesii  Baker
Glory of the Snow
County Record (GP #18-01)
Introduced
Rare
PHARB

Muscari neglectum  Guss. ex Ten.
Common Grape Hyacinth
County Record (GP #17-04)
Introduced
Uncommon
PHARB

Ornithogalum umbellatum  L.
Star-of-Bethlehem
Introduced
Rare
CNH


Agavaceae


Yucca filamentosa  L.
[Yucca flaccida  Haw.]
Yucca, Spanish Bayonet, Adam's Needle
Introduced
Occasional
PHARB


Asparagaceae


Asparagus officinalis  L.
Asparagus
Introduced
Occasional
PHARB


Ruscaceae


Convallaria majalis  L.
Lily-of-the-Valley
Introduced
Occasional
PHARB

Maianthemum canadense  Desf.
Canada Mayflower, False Lily-of-the-Valley
Native
Common
PHARB

Maianthemum racemosum  ssp.  racemosum  (L.) Link
[Smilacina racemosa  (L.) Desf.]
False Solomon's Seal
Native
Occasional
PHARB

Maianthemum stellatum  (L.) Link
Starry Solomon's Seal
Native
Occasional
PHARB

Polygonatum biflorum  (Walt.) Ell.
King Solomon's-seal
County Record (GP #20-35)
Native
Rare
PHARB

Polygonatum pubescens  (Willd.) Pursh
Solomon's Seal
Native
Uncommon
PHARB


Typhaceae


Sparganium americanum  Nutt.
Common Bur-reed
Native
Occasional
PHARB

Sparganium androcladum  (Engelm.) Morong
Shining Bur-reed
Native, Watch List
Historic
CNH

Sparganium eurycarpum  Engelm. ex A. Gray
Giant or Broad-fruited Bur-reed
Native
Rare
PHARB

Typha ×glauca  Godron
Hybrid Cattail
Native
Historic
CNH

Typha angustifolia  L.
Narrow-leaved Cattail
Native
Occasional
PHARB

Typha latifolia  L.
Broad-leaved or Common Cattail
Native
Common
PHARB


Xyridaceae


Xyris difformis  var.  difformis  Chapman
Yellow-eyed Grass
Native
Rare
PHARB

Xyris torta  Small
Twisted Yellow-eyed Grass
Native
Rare
PHARB


Eriocaulaceae


Eriocaulon aquaticum  (Hill) Druce
[Eriocaulon septangulare  With.]
Pipewort, White Buttons
Native
Occasional
PHARB


Juncaceae


Juncus acuminatus  Michaux
Sharp-fruited Rush
Native
Common
PHARB

Juncus ambiguus  Guss.
[Juncus bufonius  var.  halophilus  Buch. & Fern.]
Seaside Toad-rush
Native, Watch List
Unknown

Juncus anthelatus  (Wieg.) R.E. Brooks
Wiegand's Rush
Native
Occasional
PHARB

Juncus articulatus  L.
Jointed Rush
Native
Rare
PHARB

Juncus bufonius  L.
Toad Rush
Native
Uncommon
PHARB

Juncus canadensis  Gay ex LaHarpe
[Juncus canadensis  var.  sparsiflorus  Fern.]
Marsh or Canadian Rush
Native
Abundant
PHARB

Juncus dichotomus  Ell.
[Juncus platyphyllus  (Wieg.) Fern.]
Forked Rush
Native
Uncommon
PHARB

Juncus diffusissimus  Buckley
Slim-fruited Rush
County Record (GP #20-201)
Introduced
Rare
PHARB

Juncus effusus  ssp.  solutus  (Fern. & Wieg.) Hämet-Ahti
[Juncus effusus  var.  pylaei  (Laharpe) Fern. & Wieg.]
Soft or Common Rush
Native
Common
PHARB

Juncus gerardii  Loisel.
Saltmarsh Rush, Black Grass
Native
Common
PHARB

Juncus greenei  Oakes & Tuckerman
Greene's Rush
Native
Common
PHARB

Juncus marginatus  Rostk.
Grass-leaf Rush
Native
Uncommon
PHARB

Juncus militaris  Bigelow
Bayonet Rush
Native
Historic
CNH

Juncus pelocarpus  E. Meyer
Pondshore Rush
Native
Uncommon
PHARB

Juncus pylaei  Laharpe
[Juncus effusus  var.  solutus  Fern. & Wieg.]
Soft or Common Rush
Native
Common
PHARB

Juncus subcaudatus  (Engelm.) Cov. & Blake
Semitailed Rush
Native
Historic
CNH

Juncus tenuis  Willd.
[Juncus tenuis  var.  williamsii  Fern.]
Path Rush, Yard Rush
Native
Abundant
PHARB

Luzlua campestris  (L.) DC.
[Juncoides campestre  (L.) Kuntze]
Northern Wood-rush
County Record (GP #16-20)
Introduced
Rare
PHARB

Luzula bulbosa  (Wood) Rydb.
Bulbous Wood-rush
Native, Watch List
Common
PHARB

Luzula multiflora  ssp.  multiflora  (Retz.) Lej.
Common Wood-rush
Native
Historic
CNH


Cyperaceae


Bolboschoenus maritimus  ssp.  maritimus  (L.) Palla
Coastal Cosmopolitan Bulrush
Introduced
Rare
PHARB

Bolboschoenus maritimus  ssp.  paludosus  (A. Nels.) T. Koyama
[Scirpus maritimus  L.]
Seaside Bulrush
Native
Uncommon
PHARB

Bolboschoenus novae-angliae  (Britt.) S.G. Smith
[Scirpus cylindricus  (Torrey) Britton]
Long-spiked Bulrush
Native, Watch List
Historic
CNH

Bolboschoenus robustus  (Pursh) Soják
[Scirpus robustus  Pursh]
Saltmarsh Bulrush
Native
Uncommon
PHARB

Bulbostylis capillaris  (L.) Kunth ex C.B. Clarke
Sand Sedge
Native
Uncommon
PHARB

Carex ×olneyi  Boott
[Carex bullata  ×  C. lurida]
Olney's Sedge
Native
Unknown

Carex abscondita  Mackenzie
Concealed Sedge
Native, Watch List
Occasional
PHARB

Carex alata  Torrey
Winged Sedge
Native
Historic
CNH

Carex albicans  var.  emmonsii  (Dewey ex Torrey) J. Rettig
[Carex emmonsii  Dewey ex Torrey]
Emmon's Sedge
Native
Common
PHARB

Carex albolutescens  Schwein.
Greenish-white Sedge
Native
Common
PHARB

Carex annectens  (Bicknell) Bicknell
Yellow or Yellow-fruited Fox Sedge
Native
Common
PHARB

Carex appalachica  Webber & Ball
[Carex radiata  auct. non (Wahlenb.) Small]
Appalachian Sedge
Native
Unknown

Carex atlantica  ssp.  atlantica  Bailey
[Carex incomperta  Bicknell]
Atlantic Prickly Sedge
Native
Common
PHARB

Carex atlantica  ssp.  capillacea  (Bailey) Reznicek
[Carex howei  Mackenzie]
Threadstem or Howe's Prickly Sedge
Native
Common
PHARB

Carex bebbii  Olney ex Fern.
Bebb's Broom Sedge
Native
Historic
CNH

Carex blanda  Dewey
Woodland Sedge
Previously historic, re-established in 2016 (GP #16-63)
Native
Occasional
PHARB

Carex brevior  (Dewey) Mack. ex Lunell
Short Fescue Sedge
Previously historic, re-established in 2016 (GP #16-74)
Native
Rare
PHARB

Carex brunnescens  var.  sphaerostachya  (Tuckerman) Kukenth.
Brownish Sedge
Only known county occurrence is from the Elizabeth Islands
Native
Historic
CNH

Carex bullata  Schkuhr ex Willd.
Button Sedge
Native
Historic
PHARB

Carex canescens  ssp.  disjuncta  (Fern.) Toivonen
[Carex canescens  var.  disjuncta  Fern.]
Silvery Bog Sedge
Native
Occasional
PHARB

Carex cephalophora  Muhl. ex Willd.
Oval-headed Sedge
Native
Occasional
PHARB

Carex communis  var.  communis  Bailey
Colonial Sedge
Native
Occasional
PHARB

Carex comosa  Boott
Bristly Sedge
Native
Uncommon
PHARB

Carex crinita  var.  brevicrinis  Fern.
Fringed Sedge
Native
Rare
PHARB

Carex crinita  var.  crinita  Lam.
Awned or Fringed Sedge
Native
Rare
PHARB

Carex cumulata  (Bailey) Mackenzie
Crowded Sedge
Native
Unknown

Carex debilis  var.  debilis  Michaux
Southern Stalked Sedge
Native, Watch List
Occasional
PHARB

Carex debilis  var.  rudgei  Bailey
Northern Stalked Sedge
Native
Historic

Carex digitalis  var.  digitalis  Willd.
Slender-spiked Woodland Sedge
Native
Uncommon
PHARB

Carex disticha  Huds.
Two-rank Sedge
County Record (MDC #12001)
Introduced
Rare
PHARB

Carex echinata  Murray
[Carex angustior  Mackenzie]
Prickly Sedge
Native
Occasional
PHARB

Carex festucacea  Schkuhr ex Willd.
Fescue Sedge
Native
Rare
PHARB

Carex hormathodes  Fern.
Saltmarsh Straw Sedge
Native
Occasional
PHARB

Carex intumescens  Rudge
Bladder or Swamp Sedge
Native
Common
PHARB

Carex laevivaginata  (Kukenth.) Mackenzie
Smooth-sheathed Sedge
Native
Occasional
PHARB

Carex leptalea  ssp.  leptalea  Wahlenb.
Delicate or Bristle-stalked Sedge
Native
Historic
CNH

Carex limosa  L.
Mud Sedge
Only known county occurrence is from the Elizabeth Islands
Native, Watch List
Historic
PHARB

Carex longii  Mackenzie
Long's Sedge
Native
Common
PHARB

Carex lucorum  var.  lucorum  Willd. ex Link
[Carex pensylvanica  var.  distans  Peck]
Long-beaked Pennsylvania Sedge
Native
Occasional
PHARB

Carex lupulina  Muhl. ex Willd.
Hop Sedge
Native
Uncommon
PHARB

Carex lurida  Wahlenb.
Sallow Sedge
Native
Common
PHARB

Carex mitchelliana  M.A. Curtis
Mitchell's Awned Sedge
Previously historic, re-established in 2020 (GP #20-178)
Native, Threatened
Occasional
PHARB

Carex muehlenbergii  var.  muehlenbergii  Schkuhr ex Willd.
Muhlenberg's Sedge
Native
Occasional
PHARB

Carex nigra  (L.) Reichard
Smooth Black Sedge
Native
Rare
PHARB

Carex normalis  Mackenzie
Greater Straw Sedge
County Record (GP #16-67)
Native
Rare
PHARB

Carex pallescens  L.
[Carex pallescens  var.  neogaea  Fern.]
Pale or Shiny Green Sedge
Native
Uncommon
PHARB

Carex pellita  Muhl.
[Carex lanuginosa  Michaux]
Broad Woolly-fruited Sedge
Native
Historic
CNH

Carex pensylvanica  Lam.
Pennsylvania Sedge
Native
Abundant
PHARB

Carex radiata  (Wahlenb.) Small
Eastern Star Sedge
Only known county occurrence is from the Elizabeth Islands
Native
Historic
CNH

Carex rosea  Schkuhr ex Willd.
[Carex convoluta  Mackenzie]
Big Star Sedge
Native
Occasional
PHARB

Carex scoparia  var.  scoparia  Schkuhr ex Willd.
Broom Sedge
Native
Common
PHARB

Carex seorsa  Howe
Swamp Prickly Sedge
Previously historic, re-established in 2016 (GP #16-48)
Native
Occasional
PHARB

Carex silicea  Olney
Seabeach Sedge
Native
Occasional
PHARB

Carex spicata  Huds.
[Carex contigua  Hoppe]
European Star Sedge
Introduced
Uncommon
PHARB

Carex stipata  var.  stipata  Muhl. ex Willd.
Awl-fruited or Wrinkle-sheathed Sedge
Native
Rare
PHARB

Carex straminea  Willd. ex Schkuhr
Straw Sedge
Only known county occurrence is from the Elizabeth Islands
Native
Historic
CNH

Carex stricta  Lam.
Tussock Sedge
Native
Occasional
PHARB

Carex swanii  (Fern.) Mackenzie
Swan's Sedge
Native
Abundant
PHARB

Carex tenera  Dewey
Delicate Quill Sedge
County Record (GP #16-66)
Native
Rare
PHARB

Carex tonsa  var.  rugosperma  (Mackenzie) W.J. Crins
[Carex rugosperma  Mackenzie]
Sand Sedge
Native
Rare
PHARB

Carex tonsa  (Fern.) Bickn.
[Carex rugosperma  var.  rugosperma  Mackenzie]
Shaved Sedge
County Record (GP #17-12)
Native
Occasional
PHARB

Carex umbellata  Schkuhr ex Willd.
[Carex abdita  Bicknell]
Short-beaked Sand Sedge, Parasol Sedge
Native
Historic
CNH

Carex utriculata  Boott
[Carex rostrata  var.  utriculata  (Boott) Bailey]
Beaked or Bottle Sedge
Native
Unknown

Carex virescens  Muhl. ex Willd.
Ribbed Sedge
Native
Historic
PHARB

Carex viridula  ssp.  viridula  Michaux
Little Green Sedge
Native, Watch List
Historic
CNH

Carex vulpinoidea  Michaux
[Carex setacea  Dewey]
Fox Sedge
Native
Common
PHARB

Cladium mariscoides  (Muhl.) Torrey
Twig Sedge, Twig Rush
Native
Occasional
PHARB

Cyperus bipartitus  Torrey
[Cyperus rivularis  Kunth]
Shining or Red-scaled Flatsedge
Native
Rare
PHARB

Cyperus brevifolioides  Thieret & Delahouss.
Pasture Greenhead-sedge
Introduced
Rare
PHARB

Cyperus compressus  L.
Annual Sedge
County and State Record (GP #16-168)
Introduced
Rare
PHARB

Cyperus dentatus  Torrey
Pondshore or Toothed Flatsedge
Native
Uncommon
PHARB

Cyperus diandrus  Torrey
Strand or Red-edged Flatsedge
Native
Occasional
PHARB

Cyperus esculentus  var.  leptostachyus  Boeck.
Yellow or Tuberous Flatsedge
Native
Common
PHARB

Cyperus filicinus  Vahl
[Cyperus polystachyos  var.  filicinus  (Vahl) C.B. Clarke]
Saltpond or Seaside Flatsedge
Native
Common
PHARB

Cyperus flavescens
Yellow Flatsedge
Introduced
Rare
PHARB

Cyperus grayi  Torrey
Dune or Gray's Flatsedge
Previously historic, re-established in 2013 (TB, EH)
Native
Occasional
PHARB

Cyperus iria  L.
Rice-field Flat Sedge
County Record (GP #16-166)
Introduced
Rare
PHARB

Cyperus lupulinus  ssp.  macilentus  (Fern.) Marcks
[Cyperus filiculmis  var.  macilentus  Fern.]
Sand or Button Flatsedge
Native
Occasional
PHARB

Cyperus microiria  Steud.
Lesser rice-field sedge
County Record (GP #16-174)
Introduced
Rare
PHARB

Cyperus odoratus  L.
[Cyperus ferruginescens  Boeckl.]
Saltmarsh Flatsedge
Native, Watch List
Rare
PHARB

Cyperus retrorsus  Chapman
Pine Barren Flatsedge
Native, Watch List
Rare
PHARB

Cyperus squarrosus  L.
Awned Flatsedge
County Record (GP #16-167)
Native
Rare
PHARB

Cyperus strigosus  L.
[Cyperus strigosus  var.  robustior  Britton]
Straw-colored Flatsedge
Native
Common
PHARB

Dulichium arundinaceum  var.  arundinaceum  (L.) Britton
Threeway Sedge
Native
Occasional
PHARB

Eleocharis acicularis  (L.) R. & S.
Needle Spike-rush
Native
Occasional
PHARB

Eleocharis ambigens  Fern.
Ambiguous Spike-rush
Only known county occurrence is from the Elizabeth Islands
Native
Historic
CNH

Eleocharis elliptica  var.  elliptica  Kunth
Orange-fruited Spike-rush
Native
Historic
CNH

Eleocharis flavescens  var.  olivacea  (Torr.) Gleason
[Eleocharis olivacea  Torrey]
Olive Spike-rush
Native
Rare
PHARB

Eleocharis obtusa  var.  obtusa  (Willd.) J.A. Schultes
Soft-stemmed Spike-rush
Native
Common
PHARB

Eleocharis palustris  (L.) Roemer & Schultes
[Eleocharis palustris  var.  major  (L.) Roemer & Schultes]
Small's Spike-rush, Marsh Spike-rush
Native
Occasional
PHARB

Eleocharis parvula  (R. & S.) Link ex Bluff, Nees & Schauer
Saltpong or Dwarf Spike- rush
Native
Uncommon
PHARB

Eleocharis rostellata  (Torrey) Torrey
Beaked Spike-rush
Native, Watch List
Rare
PHARB

Eleocharis tenuis  var.  tenuis  (Willd.) J.A. Schultes
Slender Spike-rush
Previously historic, re-established in 2012 (KF, TB)
Native
Occasional
PHARB

Eleocharis uniglumis  (Link) Schultes
[Eleocharis halophila  (Fern. & Brack.) Fern. & Brack]
Saline Spike-rush
Native
Historic
CNH

Eriophorum tenellum  Nutt.
Rough or Conifer Cottongrass
Native
Historic
CNH

Eriophorum virginicum  L.
Tawny or Virginia Cottongrass
Native
Rare
PHARB

Fimbristylis autumnalis  (L.) Roemer & Schultes
Autumn or Northern Fimbry
Native
Occasional
PHARB

Kyllinga gracillima  Miq.
Pasture Greenhead-sedge
County Record (GP #18-164)
Introduced
Rare
PHARB

Lipocarpha micrantha  (Vahl) G. Tucker
[Hemicarpha micrantha  (Vahl) Pax ex Engler & Prantl]
Lakeshore Hemicarpha
Native, Threatened
Rare
PHARB

Rhynchospora alba  (L.) Vahl
White Beak-rush
Native
Rare
PHARB

Rhynchospora capitellata  (Michaux) Vahl
Brown Beak-rush
Native
Common
PHARB

Rhynchospora fusca  (L.) Aiton f.
Sooty Beak-rush
Native
Historic
CNH

Schoenoplectus acutus  (Muhl. Ex Bigelow) A. & D. Love
[Scirpus acutus  Muhl. Ex Bigelow]
Hard-stemmed Bulrush
County Record (MDC #2240)
Native, Watch List
Rare
PHARB

Schoenoplectus americanus  (Pers.) Volk. ex Schinz & R. Keller
[Scirpus americanus  Pers.]
Saltmarsh Bulrush
Native
Uncommon
PHARB

Schoenoplectus pungens  (Vahl) Palla
[Scirpus pungens  var.  pungens  (Vahl) Palla]
Chairmaker's Bulrush
Native
Common
PHARB

Schoenoplectus purshianus  var.  purshianus  (Fern.) M.T. Strong
[Scirpus purshianus  var.  purshianus  (Fern.) M.T. Strong]
Pursh's Bulrush
Previously historic, re-established in 2015 (GP #15-44)
Native
Rare
PHARB

Schoenoplectus subterminalis  (Torr.) Sojak
[Scirpus subterminalis  Torr.]
Water Bulrush
County record (TB, MDC #1929)
Native
Rare
PHARB

Schoenoplectus tabernaemontani  (K.C. Gmel.) Palla
[Scirpus tabernaemontani  K. C. Gmelin]
Soft-stemmed Bulrush
Native
Common
PHARB

Scirpus cyperinus  (L.) Kunth
[Scirpus rubricosus  Fern.]
Wool-grass, Common Bulrush
Native
Common
PHARB

Scirpus hattorianus  Makino
Mosquito Bulrush
County Record (GP #19-262)
Native
Rare
PHARB

Scleria pauciflora  var.  caroliniana  (Willd.) Wood
Papillose Nut-sedge
Native, Endangered
Uncommon
PHARB

Scleria pauciflora  var.  pauciflora  Muhl. ex Willd.
Papillose Nut-sedge
Native, Endangered
Uncommon
PHARB

Scleria reticularis  Michaux
Pondshore or Reticulate Nut-sedge
Native, Watch List
Historic
CNH


Poaceae


Agrostis capillaris  L.
[Agrostis tenuis  Sibth.]
Rhode Island Bentgrass
Introduced
Common
PHARB

Agrostis gigantea  Roth
[Agrostis alba  auct. non L.]
Redtop, Black Bentgrass
Introduced
Abundant
PHARB

Agrostis hyemalis  (Walt.) B.S.P.
Southern Ticklegrass
Native
Uncommon
PHARB

Agrostis perennans  (Walt.) Tuckerman
[Agrostis altissima  (Walter) Tuckerman]
Upland Bentgrass
Native
Occasional
PHARB

Agrostis scabra  Willd.
Northern Ticklegrass
Native
Common
PHARB

Agrostis stolonifera  L.
[Agrostis stolonifera  var.  palustris  (Hudson) Farw.]
Creeping Bentgrass
Introduced
Common
PHARB

Aira caryophyllea  var.  caryophyllea  L.
Silvery Hairgrass
Introduced
Common
PHARB

Aira praecox  L.
Strict Hairgrass
Introduced
Abundant
PHARB

Ammophila breviligulata  ssp.  breviligulata  Fern.
Dunegrass
Native
Abundant
PHARB

Andropogon gerardii  Vitman
Big Bluestem, Turkeyfoot
Native
Unknown
PHARB

Andropogon glomeratus  var.  glomeratus  (Walter) B.S.P.
[Andropogon virginicus  var.  abbreviatus  (Hackel) Fern. &]
Bunched Broom-sedge
Native
Common
PHARB

Andropogon virginicus  var.  virginicus  L.
Broom-sedge
Native
Common
PHARB

Anthoxanthum nitens  ssp.  nitens  (Weber) Y. Schouten & Veldkamp
[Hierochloe odorata  (L.) Beauv.]
Sweet or Indian Grass
Native
Historic
CNH

Anthoxanthum odoratum  L.
Sweet Vernalgrass
Introduced
Abundant
PHARB

Anthoxanthum ovatum  var.  aristatum  Pérez-Lara
[Anthoxanthum aristatum  Boiss.]
Puel's Vernalgrass
Introduced
Historic
CNH

Apera spica-venti  (L.) Beauv.
Silky Bentgrass
Introduced
Unknown

Aristida dichotoma  var.  dichotoma  Michaux
Poverty Grass
Native
Occasional
PHARB

Aristida longespica  var.  geniculata  (Raf.) Fern.
Slender Needle-grass
County record (GP #19-288)
Native
Rare
PHARB

Aristida purpurascens  Poiret
Purple Needle-grass
Native, Threatened
Rare
PHARB

Arrhenatherum elatius  (L.) J. & K. Presl
Tall Oat Grass
Introduced
Rare
PHARB

Avena fatua  L.
Common Wild Oat
County Record (GP #21-142)
Introduced
PHARB

Avena sativa  L.
Wild Oats
Previously historic, re-established in 2017 (GP #17-77)
Introduced
Waif
PHARB

Bromus commutatus  Schrader
Hairy Chess
Introduced
Historic

Bromus hordeaceus  ssp.  hordeaceus  L.
[Bromus mollis  auct. non L.]
Soft Chess
Introduced
Occasional
PHARB

Bromus hordeaceus  ssp.  thominei  (Hardouin) Hylander
[Bromus thominii  Hardouin]
Soft Chess
Introduced
Historic
CNH

Bromus inermis  Leyss.
Smooth Brome
County Record (GP #17-45)
Introduced
Common
PHARB

Bromus japonicus  Thunb. ex Murr.
Japanese Brome
County Record (GP #17-57)
Introduced
Rare
PHARB

Bromus secalinus  L.
Rye Brome
Introduced
Historic
CNH

Bromus tectorum  L.
Drooping Brome
Introduced
Common
PHARB

Calamagrostis canadensis  var.  canadensis  (Michaux) Beauv.
Canada Bluejoint, Reedgrass
Native
Common
PHARB

Calamagrostis cinnoides  (Muhl.) Bart.
[Calamagrostis coarctata  (Torrey) Eaton]
Reed Bluejoint
Native
Rare
PHARB

Calamagrostis epigejos  (L.) Roth
Feathertop Reed Grass
County Record (GP #16-135)
Introduced
Occasional
PHARB

Calamagrostis stricta  (Timm) Koel.
Neglected Reed Grass
County Record (GP #16-177)
Native
Waif
PHARB

Cenchrus alopecuroides  (L.) Thunb.
Fountain Grass
County Record (GP #17-159)
Introduced
Uncommon
PHARB

Cenchrus longispinus  (Hackel) Fern.
Common or Field Sandbur, Sandspur
Native
Historic
CNH

Chloris verticillata  Nutt.
Windmill-grass
Only known county occurrence is from the Elizabeth Islands
Introduced
Historic
CNH

Cinna arundinacea  L.
Common, Stout, or Broad Woodreed
Native
Rare
PHARB

Coleataenia longifolia  ssp.  longifolia  (Torr.) Soreng
[Panicum longifolium   Torr.]
Long-leaved Panic- grass
Only known county occurrence is from the Elizabeth Islands
Native, Threatened
Rare

Coleataenia rigidula  ssp.  rigidula  (Bosc ex Nees)
[Panicum rigidulum  var.  rigidulum  Bosc ex Nees]
Flat-stemmed Panic-grass
Previously historic, re-established in 2020 (GP #20-219)
Native
Rare
PHARB

Corynephorus canescens  (L.) Beauv.
Clubgrass, Gray Hairgrass
Introduced
Historic
CNH

Dactylis glomerata  L.
Orchard Grass
Introduced
Abundant
PHARB

Danthonia compressa  Austin ex Peck
Flattened Oatgrass
County Record (GP #16-98)
Native
Occasional
PHARB

Danthonia spicata  (L.) Beauv. ex Roemer & J.A. Schultes
Poverty-grass, Wild Oatgrass
Native
Common
PHARB

Deschampsia flexuosa  (L.) Trin.
Common Hairgrass
Native
Common
PHARB

Dichanthelium acuminatum  ssp.  acuminatum  (Sw.) Gould & Clark
[Panicum auburne  Ashe]
Auburn Panic-grass
Native, Watch List
Common

Dichanthelium acuminatum  ssp.  columbianum  (Scribn.) Freckmann & Lelong
[Dichanthelium columbianum  (Scribner) Freckmann]
Downy Panic-grass
Native
Common
PHARB

Dichanthelium acuminatum  ssp.  lindheimeri  (Nash) Freckmann & Lelong
[Dichanthelium acuminatum  var.  lindheimeri  Gould & Clark]
Lindheimer's Panic-grass
Native
Historic
CNH

Dichanthelium clandestinum  (L.) Gould
[Panicum clandestinum]
Deer-tongue, Riverside Panic-grass
Native
Common
PHARB

Dichanthelium columbianum  (Scribn.) Freckmann
Panic-grass
Native
Common
PHARB

Dichanthelium commutatum  ssp.  ashei  (G. Pearson ex Ashe) Freckmann & Lelong
[Panicum commutatum  J.A. Schultes]
Changeable Panic-grass
Only known county occurrence is from the Elizabeth Islands
Native
Historic

Dichanthelium depauperatum  (Muhl.) Gould
[Panicum depauperatum  Muhl.]
Depauperate Panic-grass
Native
Occasional
PHARB

Dichanthelium dichotomum  ssp.  dichotomum  (L.) Gould
[Panicum dichotomum  L.]
Forked Panic-grass
Native
Occasional
PHARB

Dichanthelium dichotomum  ssp.  mattamuskeetense  (Ashe) Freckmann & Lelong
[Dichanthelium mattamuskeetense  (Ashe) Mohlenbrock]
Mattamuskeet Panic-grass
Native, Endangered
Historic
CNH

Dichanthelium dichotomum  ssp.  microcarpon  (Muhl. ex Ell.) Freckmann & Lelong
[Dichanthelium microcarpon  (Muhl. ex Ell.) Mohlenbrock]
Tiny-fruited Panic-grass
Native
Occasional
PHARB

Dichanthelium huachucae  (Ashe) G.Wilh. & Rericha
Hairy Rosette Grass
Native
Occasional
PHARB

Dichanthelium implicatum  (Scribn.) Kerguélen
Panic Grass
Native
Uncommon
PHARB

Dichanthelium meridionale  (Ashe) Freckmann
Matting Rosette Grass
Native
Common
PHARB

Dichanthelium oligosanthes  ssp.  scribnerianum  (Nash) Freckmann & Lelong
[Dichanthelium oligosanthes  var.  scribnerianum  (Nash)]
Scribner's Panic-grass
Native
Occasional
PHARB

Dichanthelium ovale  ssp.  pseudopubescens  (Nash) Freckmann & Lelong
[Dichanthelium commonsianum  (Ashe) Freckmann]
Commons' Panic-grass
Only known county occurrence is from the Elizabeth Islands
Native
Historic
CNH

Dichanthelium ovale  ssp.  villosissimum  (Nash) Freckmann & Lelong
[Dichanthelium villosissimum  (Nash) Freckmann]
Villous Panic-grass
Native
Historic
CNH

Dichanthelium scoparium  (Lam.) Gould
[Panicum scoparium  Lam.]
Broom Panic-grass
Previously historic, re-established in 2019
Native
Rare
PHARB

Dichanthelium sphaerocarpon  (Ell.) Gould
Round-fruited Panic-grass
Native
Occasional
PHARB

Dichanthelium spretum  (Schult.) Freckmann
Eaton's Rosette Grass
County Record (GP #21-45)
Native
PHARB

Dichanthelium linearifolium  (Scribn.) Gould
Linear-leaved Rosette Panic-grass
Native
Historic

Digitaria cognata  (J. A Schultes) Pilger
[Leptoloma cognatum  (J.A.Schultes) Chase]
Fall Witchgrass
Native, Watch List
Rare
PHARB

Digitaria filiformis  var.  filiformis  (L.) Koeler
Slender Crabgrass
Native
Historic
CNH

Digitaria ischaemum  (Schreber) Muhl.
Smooth Crabgrass
Introduced
Common
PHARB

Digitaria sanguinalis  (L.) Scop.
Tall or Large Crabgrass
Introduced
Historic
CNH

Distichlis spicata  (L.) Greene
Saltmarsh Spikegrass, Alkali-grass, Saltgrass
Native
Common
PHARB

Echinochloa crus-galli  (L.) Beauv.
Barnyard Grass
Introduced
Common
PHARB

Echinochloa frumentacea  Link
[Echinochloa crus-galli  var.  frumentacea  (Link) W.]
Japanese Millet
Introduced
Historic
CNH

Echinochloa muricata  var.  microstachya  Wiegand
Cockspur-grass, Barnyard Grass
Native
Rare
PHARB

Echinochloa muricata  var.  muricata  (Beauv.) Fern.
Cockspur-grass, Barnyard Grass
Previously historic, re-established in 2018 (GP #18-118)
Native
Rare
PHARB

Echinochloa walterii  (Pursh) Heller
Walter's Cockspur, Water Millet
Native
Occasional
PHARB

Eleusine indica  (L.) Gaertn.
Indian Goosegrass
County Record (EL 2012)
Introduced
Occasional
PHARB

Elymus glabriflorus  var.  australis  (Scribn. & Ball) J.J.N. Campb.
Southeastern Wild Rye
Native
Historic
CNH

Elymus repens  (L.) Gould
[Elytrigia repens  (L.) Desv. ex B.D. Jackson]
Quack-grass, Couch-grass
Native
Common
PHARB

Elymus virginicus  var.  halophilus  (Bickn.) Wieg.
Saltmarsh Wild Rye
Native
Rare
PHARB

Elymus virginicus  var.  virginicus  L.
Virginia Wild Rye
Native
Rare
PHARB

Eragrostis capillaris  (L.) Nees
Lace Lovegrass
County Record (GP #20-146)
Native
Rare
PHARB

Eragrostis cilianensis  (All.) Lut. ex Janchen
[Eragrostis megastachya  (Koeler) Link]
Stink Grass, Skunk Grass
Introduced
Uncommon
PHARB

Eragrostis curvula  (Schrad.) Nees
Weeping Lovegrass
County Record (GP #16-176)
Introduced
Rare
PHARB

Eragrostis pectinacea  var.  pectinacea  (Michaux) Nees
Tufted or Carolina Lovegrass
Native
Uncommon
PHARB

Eragrostis pilosa  (L.) Beauv.
India Lovegrass
County Record (GP #16-159)
Introduced
Uncommon
PHARB

Eragrostis spectabilis  (Pursh) Steudel
[Eragrostis spectabilis  var.  sparsihirsuta  Farw.]
Purple Lovegrass, Tumble-grass
Native
Common
PHARB

Festuca filiformis  Pourret
[Festuca capillata  Lam.]
Hair Fescue
Introduced
Common
PHARB

Festuca ovina  L.
Sheep Fescue
Introduced
Historic
PHARB

Festuca rubra  L.
Chewing's Fescue
Native
Common
PHARB

Festuca subverticillata  (Pers.) Alexeev
[Festuca obtusa  Biehler]
Nodding Fescue
Native
Uncommon
PHARB

Festuca trachyphylla  (Hackel) Krajina
[Festuca duriuscula  L. sensu auct. amer.]
Hard Fescue
Introduced
Unknown

Glyceria acutiflora  Torrey
Sharp-scaled Mannagrass
Native
Historic
PHARB

Glyceria canadensis  (Michaux) Trin.
Rattlesnake Grass, Mannagrass
Native
Occasional
PHARB

Glyceria obtusa  (Muhl.) Trin.
Coastal Mannagrass
Native
Occasional
PHARB

Glyceria striata  (Lam.) A.S. Hitchc.
[Glyceria striata  var.  stricta  (Scribner)]
Fowl Meadow-grass, Fowl Mannagrass
Native
Occasional
PHARB

Holcus lanatus  L.
Velvet-grass
Introduced
Abundant
PHARB

Hordeum jubatum  ssp.  jubatum  L.
Foxtail-barley, Squirrel-tail
Native
Historic
CNH

Leersia oryzoides  (L.) Sw.
Rice Cut-grass
Native
Common
PHARB

Leptochloa fusca  ssp.  fascicularis  (Lam.) N. Snow
[Diplachne maritima  Bicknell]
Saltpond Grass, Salty Sprangletop
Native, Threatened
Rare
CNH

Leymus mollis  ssp.  mollis  (Trin.) Hara
[Elymus arenarius  var.  villosus  Meyer]
Sea Lyme-grass, American Dunegrass
Native, Endangered
Historic
CNH

Lolium multiflorum  Lam.
[Lolium perenne  var.  aristatum  Willd.]
Italian Rye-grass
Introduced
Unknown

Lolium perenne  L.
Perennial or English Rye-grass
Introduced
Common
PHARB

Microstegium vimineum  (Trin.) A. Camus
Japanese Stilt Grass
County Record (EL,TB 2009)
Introduced, Invasive
Common
PHARB

Miscanthus sinensis  Anderss.
Chinese Silvergrass
County Record (GP #16-144)
Introduced
Occasional
PHARB

Muhlenbergia frondosa  (Poiret) Fern.
Wirestem or Leafy Muhly
Native
Historic
CNH

Muhlenbergia schreberi  J.F. Gmelin
Nimblewill
Previously historic, re-established in 2011 (EL)
Native
Common
PHARB

Panicum capillare  L.
[Panicum capillare  var.  occidentale  Rydb.]
Witch Grass
Previously historic, re-established in 2020 (GP #20-239)
Native
Rare
PHARB

Panicum dichotomiflorum  var.  dichotomiflorum  Michaux
[Panicum dichotomiflorum  var.  geniculatum  (Wood) Fern.]
Fall Panic-grass
Native
Common
PHARB

Panicum dichotomiflorum  var.  puritanorum  Svenson
Svenson's Panic-grass
Native
PHARB

Panicum miliaceum  L.
Proso Millet
County Record (GP #20-144)
Introduced
PHARB

Panicum philadelphicum  var.  campestre  (Gatt.) A. Haines
[Panicum philadelphicum  ssp.  gattingeri  (Nash)]
Gattinger's Panic-grass
County Record (GP #16-163)
Native
PHARB

Panicum philadelphicum  var.  philadelphicum  Bernh. ex Trin.
Philadelphia Panic-grass
County Record (GP #19-213)
Native, Special Concern
PHARB

Panicum verrucosum  Muhl.
Warty Panic-grass
Previously historic, re-established in 2019 (GP #19-200)
Native
Rare
PHARB

Panicum virgatum  L.
[Panicum virgatum  var.  cubense  Griseb.]
Saltmarsh Switchgrass
Native
Abundant
PHARB

Paspalum laeve  Michaux
[Paspalum laeve  var.  circulare  (Nash) W. Stone Fern.]
Field or Meadow Beadgrass
Native
Historic
CNH

Paspalum setaceum  var.  muhlenbergii  (Nash) D. Banks
[Paspalum ciliatifolium  var.  muhlenbergii  (Nash) Fern.]
Muhlenberg's Beadgrass
Native
Uncommon
PHARB

Paspalum setaceum  var.  psammophilum  (Nash) D. Banks
[Paspalum psammophilum]
Sand Beadgrass
Native, Watch List
Uncommon
PHARB

Paspalum setaceum  var.  setaceum  Michaux
Small-fruited or Slender Beadgrass
Native, Watch List
Uncommon
PHARB

Phalaris arundincaea  L.
Reed Canary Grass
Introduced, Invasive
Occasional
PHARB

Phleum pratense  L.
[Phleum pratense  ssp.  nodosum  (L.) Arcang.]
Timothy
Introduced
Common
PHARB

Phragmites americanus  (Saltonst., P.M. Peterson, & Soreng) A. Haines
American Reed
County Record (EL 2018)
Native, Watch List
Rare
LAST RECORD 2018

Phragmites australis  var.  australis  (Cav.) Trin. ex Steudel
Phragmites, Common Reed
Introduced, Invasive
Common
PHARB

Piptochaetium avenaceum  (L.) Parodi
[Stipa avenacea  L.]
Black Oatgrass
Native, Watch List
Rare
PHARB

Poa annua  L.
Annual Bluegrass, Low Speargrass
Introduced
Common
PHARB

Poa bulbosa  L.
Bulbous Blue Grass
County Record (GP #17-05)
Introduced
Rare
PHARB

Poa compressa  L.
Canada or Flat-stemmed Bluegrass
Introduced
Occasional
PHARB

Poa palustris  L.
Fowl Meadow Grass
Introduced
Historic
CNH

Poa pratensis  ssp.  angustifolia  (L.) Arcang.
[Poa angustifolia  L.]
Narrow-leaved Kentucky Bluegrass
Introduced
Uncommon
PHARB

Poa pratensis  ssp.  pratensis  L.
Junegrass, Kentucky Bluegrass
Introduced
Common
PHARB

Poa trivialis  ssp.  trivialis  L.
Rough Bluegrass
Previously historic, re-established in 2018 (GP #18-11)
Introduced
Occasional
PHARB

Puccinellia pumila  (Vasey) A.S. Hitchc.
[Glyceria paupercula  (Holmb.)]
Northern Alkali Grass
Native
Historic
CNH

Schedonorus arundinaceus  (Schreb.) Dumort.
[Festuca arundinacea  Vill.]
Tall Fescue
County Record (GP #17-163)
Introduced
Uncommon
PHARB

Schedonorus pratensis  (Huds.) Beauv.
[Festuca pratensis  Hudson]
Meadow Fescue
Introduced
Historic
CNH

Schedonorus pratensis  (Huds.) Beauv.
Meadow Rye Grass
Introduced
Uncommon
CNH

Schizachyrium scoparium  var.  scoparium  (Michaux) Nash
[Andropogon scoparium  Michaux]
Little Bluestem, Broom or Prairie Beardgrass
Native
abundant
PHARB

Secale cereale  L.
Cultivated Rye
County Record (GP #16-85)
Introduced
Rare
PHARB

Setaria faberi  Herrm. ex Rosen
Foxtail Grass, Nodding or Giant Foxtail
Introduced
Occasional
PHARB

Setaria italica
[Panicum verticillatum  L.]
Millet Foxtail
County Record (GP #16-178)
Introduced
Rare
PHARB

Setaria parviflora  (Poiret) Kerguelen
[Setaria geniculata  (Lam.) Beauv.]
Bristly or Saltmarsh Foxtail
Native, Special Concern
Occasional
PHARB

Setaria pumila  ssp.  pumila  (Poir.) Roemer & J.A. Schultes
[Panicum pumilum  Poir.]
Yellow Foxtail
Introduced
Common
PHARB

Setaria viridis  var.  viridis  (L.) Beauv.
[Setaria viridis  var.  weinmannii  (Roemer & Schultes) Brand]
Green Foxtail, Bottle Grass
Previously historic, re-established in 2012 (EL)
Introduced
Rare
PHARB

Sorghastrum nutans  (L.) Nash
Indian Grass
Native
Uncommon
PHARB

Spartina ×caespitosa  A.A. Eaton
[Spartina patens  var.  monogyna  (M.A. Curtis)]
Short Cordgrass
Native
Historic
CNH

Spartina alterniflora  Loisel
Smooth or Saltwater Cordgrass
Native
Common
PHARB

Spartina cynosuroides  (L.) Roth
Salt Reedgrass
Native, Threatened
Historic

Spartina patens  (Aiton) Muhl.
[Spartina patens  ×  S. pectinata]
Salt-hay, Salt-meadow Grass, Cordgrass
Native
Common
PHARB

Spartina pectinata  Link
[Spartina pectinata  var.  suttiei  (Farw.) Fern.]
Freshwater or Prairie Cordgrass, Slough-grass
Native
Common
PHARB

Sporobolus vaginiflorus  var.  vaginiflorus  (Torrey ex A. Gray) Wood
Poverty Grass
Native
Historic
CNH

Thinopyrum intermedium  (Host) Barkworth & D.R.Dewey
[Elytrigia intermedia  Nevski.]
Intermediate Wheatgrass
County Record (GP #17-155)
Introduced
Rare
PHARB

Thinopyrum pycnanthum  (Godr.) Barkworth
Tick Quack Grass
Introduced
Uncommon
PHARB

Torreyochloa pallida  var.  pallida  (Torrey) Church
[Glyceria pallida  (Torr.) Trin.]
Pale or Torrey's Mannagrass
Native
Rare
PHARB

Tridens flavus  var.  flavus  (L.) A.S. Hitchc.
[Triodia flava  (L.) Smyth]
Purpletop, Tall Retop
Introduced
Occasional
PHARB

Triplasis purpurea  var.  purpurea  (Walter) Chapman
Gama-grass, Sesame Grass
Native
Historic
PHARB

Tripsacum dactyloides  (L.) L.
Gama-grass
Native, Endangered
Rare

Vulpia myuros  (L.) K.C. Gmelin
[Vulpia myuros  var.  hirsuta  Hackel]
Mousetail or Rattail Fescue
Introduced
Common
PHARB

Vulpia octoflora  var.  octoflora  (Walt.) Rydb.
Eight-flowered Six-weeks Grass
County record (GP #18-43)
Native
Uncommon
PHARB

Vulpia octoflora  var.  tenella  (Willd.) Fern.
[Festuca octoflora  var.  glauca  (Nutt.) Fern.]
Six-weeks Fescue
Native
Historic
CNH

Zizania palustris  var.  palustris  L.
[Zizania aquatica  var.  angustifolia  A.S. Hitchc.]
Slender Wild Rice
Native, Watch List
Historic
CNH

Zoysia japonica  Steud.
Zoysia Grass
Introduced
Uncommon
PHARB


Commelinaceae


Commelina communis  L.
Dayflower
Introduced
Uncommon
PHARB

Tradescantia ohiensis  Raf.
Smooth Spiderwort
County Record (GP #20-53)
Native
Rare
PHARB

Tradescantia virginiana  L.
Virginia Spiderwort
Introduced
Historic
CNH


Pontederiaceae


Pontederia cordata  L.
[Pontederia cordata  var.  lancifolia  (Muhl.) Torrey]
Pickerel Weed
Native
Uncommon
PHARB


Ceratophyllaceae


Ceratophyllum demersum  L.
Common hornwort
County Record (GP #21-98)
Native
Unknown
PHARB

Ceratophyllum echinatum  A. Gray
Forked Coontail
County Record (MDC 2010)
Native
Rare
PHARB


Lardizabalaceae


Akebia quinata  (Houtt.) Dcne.
Five-leaved Akebia
Only known county occurrence is from the Elizabeth Islands
Introduced
Historic
CNH


Berberidaceae


Berberis thunbergii  DC.
Japanese Barberry
Introduced, Invasive
Uncommon
PHARB

Berberis vulgaris  L.
European Barberry
Introduced
Historic
CNH

Podophyllum peltatum  L.
Mayapple
Introduced
Rare
PHARB


Ranunculaceae


Actaea pachypoda  Ell.
[Actaea alba  auct. non L. P. Miller]
Doll's Eyes, White Baneberry
Native
Rare
PHARB

Actaea rubra  (Aiton) Willd.
Red Baneberry
Native
Historic
CNH

Anemone quinquefolia  var.  quinquefolia  L.
Wood Anemone
Native
Abundant
PHARB

Anemone virginiana  var.  virginiana  L.
Stout Thimbleweed
Native
Historic

Aquilegia canadensis  L.
Columbine
Native
Rare
PHARB

Clematis terniflora  DC.
[Clematis paniculata  Thunb.]
Yam-leaf Clematis
Introduced
Common
PHARB

Ficaria verna  Huds.
[Ranunculus ficaria  ssp.  bulbifera  (Marsden-Jones) Lawalree]
Fig-crowfoot, Lesser Celandine
Introduced
Rare
PHARB

Ranunculus abortivus  L.
[Ranunculus abortivus  var.  acrolasius  Fern.]
Kidney-leaved Buttercup, Crowfoot
Native
Occasional
PHARB

Ranunculus acris  L.
[Ranunculus acris  var.  latisectus  G. Beck]
Tall, Common, or Meadow Buttercup
Introduced
Occasional
PHARB

Ranunculus aquatilis  var.  diffusus  Withering
[Ranunculus trichophyllus  var.  diffusus  L.]
White Water Crowfoot
Native
Historic
CNH

Ranunculus bulbosus  L.
Bulbous Buttercup or Crowfoot
Introduced
Common
PHARB

Ranunculus cymbalaria  Pursh
Seaside Crowfoot
Native
Rare
CNH

Ranunculus flabellaris  Raf.
Yellow Water Buttercup or Crowfoot
Native
Historic
PHARB

Ranunculus recurvatus  var.  recurvatus  Poiret
Hooked Buttercup or Crowfoot
Native
Historic
CNH

Ranunculus repens  L.
Creeping or Spotted Buttercup
Introduced
Rare
PHARB

Thalictrum pubescens  Pursh
[Thalictrum pubescens  var.  hebecarpum  (Fern.) Boivin]
Tall Meadow Rue
Native
Uncommon
PHARB


Papaveraceae


Chelidonium majus  L.
Celandine
Introduced
Common
PHARB

Glaucium flavum  Crantz
Sea or Horned Poppy
Introduced, Invasive
Uncommon
PHARB


Platanaceae


Platanus occidentalis  L.
Sycamore, Buttonwood
Introduced
Historic
PHARB


Hamamelidaceae


Hamamelis virginiana  L.
Witch Hazel
Native
Common
PHARB


Crassulaceae


Crassula aquatica  (L.) Schoenl.
[Tillaea aquatica  L.]
Shore Pygmyweed
Previously historic, re-established in 2019 (GP #19-97)
Native, Threatened
Rare
PHARB

Hylotelephium telephium  ssp.  telephium  (L.) H. Ohba
[Sedum telephium  L.]
Garden Orpine
Introduced
Historic

Sedum acre  L.
Wall Sedum, Mossy Stonecrop
Introduced
Rare
PHARB


Haloragaceae


Myriophyllum aquaticum  (Vell.) Verdc.
Parrot's-feather Water-milfoil
County Record (GP #20-250)
Introduced
Rare
PHARB

Myriophyllum humile  (Raf.) Morong
Lowly Water-milfoil
Native
Occasional
PHARB

Myriophyllum pinnatum  (Walter) B.S.P.
[Myriophyllum scabratum  Michaux]
Pinnate Water-milfoil
Only known county occurrence is from the Elizabeth Islands
Native, Special Concern
Historic
CNH

Myriophyllum spicatum  L.
Spiked or European Water-milfoil
Introduced, Invasive
Uncommon
PHARB

Myriophyllum tenellum  Bigelow
Leafless Water-milfoil
Native
Occasional
PHARB

Proserpinaca palustris  L.
[Proserpinaca palustris  var.  crebra  Fern & Griscom]
Mermaid-weed
Native
Common
PHARB

Proserpinaca pectinata  Lam.
Comb-leaved Mermaid-weed
Native
Rare
PHARB


Grossulariaceae


Ribes cynosbati  L.
Pasture Gooseberry
Introduced
Unknown

Ribes hirtellum  Michaux
[Ribes hirtellum  var.  calcicola  (Fern.) Fern.]
Swamp or Downy Gooseberry
Native
Occasional
PHARB

Ribes rubrum  L.
[Ribes sativum  Syme]
Red Currant
Introduced
Uncommon
CNH

Ribes uva-crispa  var.  sativum  DC.
[Ribes grossularia  L.]
European Gooseberry
Introduced
Unknown


Saxifragaceae


Chrysosplenium americanum  Schwein. ex Hooker
Golden Saxifrage, Water Mat, Water Carpet
Native
Occasional
PHARB


Vitaceae


Ampelopsis heterophylla  var.  brevipedunculata  C.L. Li
[Ampelopsis brevipedunculata  (Maxim.) Trautv.]
Porcelain Berry
Introduced
Abundant
PHARB

Parthenocissus inserta  (Kerner) Fritsch
Ticket-creeper
Native
Uncommon
PHARB

Parthenocissus quinquefolia  (L.) Planchon
Virginia Creeper, Woodbine
Only known county occurrence is from the Elizabeth Islands
Native
Common
PHARB

Parthenocissus tricuspidata  (Sieb. & Zucc.) Planchon
Boston Ivy
Introduced
Historic
CNH

Vitis aestivalis  var.  aestivalis  Michaux
Silver-leaved Grape
Native
Rare
PHARB

Vitis aestivalis  var.  bicolor  Deam
[Vitis aestivalis  var.  argentifolia  (Munson) Fern.]
Silver-leaved Grape
Native
Uncommon
PHARB

Vitis labrusca  L.
Fox Grape
Native
Common
PHARB


Celastraceae


Celastrus orbiculatus  Thunb.
Oriental Bittersweet
Introduced, Invasive
Abundant
PHARB

Celastrus scandens  L.
American Bittersweet, Waxwork
Native, Threatened
Historic
CNH

Euonymus alatus  (Thunb.) Sieb.
Burning Bush
County Record (EL 2015)
Introduced, Invasive
Rare
PHARB

Euonymus europaeus  L.
European Spindle Tree
Introduced
Rare
PHARB

Euonymus fortunei  (Turcz.) Hand.-Mazz.
Wintercreeper
County Record (GP #20-05)
Introduced
Uncommon
PHARB


Oxalidaceae


Oxalis corniculata  L.
[Oxalis repens  Thunb.]
Creeping Wood Sorrel
Introduced
Occasional
PHARB

Oxalis dillenii  Jacq.
Southern or Showy Yellow Woodsorrel
Native
Unknown
PHARB

Oxalis stricta  L.
[Oxalis europaea  Jordan]
Common Yellow Woodsorrel
Native
Common
PHARB


Hypericaceae


Hypericum boreale  (Britton) Bicknell
Northern Dwarf St. John's-Wort
Native
Common
PHARB

Hypericum canadense  L.
Canadian St. John's-Wort
Native
Common
PHARB

Hypericum dissimulatum  Bicknell
Bicknell's St. John's-Wort
Native
Historic
CNH

Hypericum ellipticum  Hooker
Pale St. John's-Wort
Native
Historic
PHARB

Hypericum gentianoides  (L.) B.S.P.
Pineweed, Orange Grass
Native
Common
PHARB

Hypericum mutilum  L.
Dwarf St. John's-Wort
Native
Common
PHARB

Hypericum perforatum  L.
Common St. John's-Wort
Introduced
Common
PHARB

Hypericum prolificum  L.
Shrubby St. John's-Wort
Introduced
Unknown

Hypericum punctatum  Lam.
Spotted St. John's-Wort
Native
Rare
CNH

Triadenum virginicum  (L.) Raf.
[Hypericum virginicum  L.]
Marsh or Pink St. John's-Wort
Native
Common
PHARB


Elatinaceae


Elatine minima  (Nutt.) Fischer & C.A. Meyer
Lesser Waterwort
Native
Rare
PHARB


Violaceae


Viola affinis  Le Conte
[Viola latiuscula  Greene]
Le Conte's Violet
Native
Occasional
PHARB

Viola blanda  Willd.
Sweet White Violet
Native
Historic

Viola cucullata  Aiton
Blue Marsh Violet
Native
Common
PHARB

Viola labradorica  Schrank
American Dog Violet
Introduced
Rare
PHARB

Viola lanceolata  ssp.  lanceolata  L.
Lance-leaf Violet
Native
Occasional
PHARB

Viola odorata  L.
English Violet
County Record (GP #20-12)
Introduced
Rare
PHARB

Viola pallens  (Banks ex DC.) Brainerd
[Viola macloskeyi  ssp.  pallens  (Banks ex DC.) Baker]
Northern White Violet
Native
Occasional
PHARB

Viola pedata  L.
Bird's Foot Violet
Native
Common
PHARB

Viola primulifolia  L.
[Viola primulifolia  var.  acuta  (Bigelow) Torr. & Gray]
Primrose-leaf Violet
Native
Historic
CNH

Viola sagittata  var.  ovata  (Nutt.) Torr. & Gray
[Viola fimbriatula  J. E. Smith]
Arrowhead Violet
Native
Common
PHARB

Viola sagittata  var.  sagittata  Aiton
Erect Arrowhead Violet
Native
Historic
CNH

Viola sororia  Willd.
[Viola papilionacea  Pursh p. p.]
Common Blue or Dooryard Violet
Native
Occasional
PHARB

Viola tricolor  L.
Johnny-jump-up
Introduced
Waif
PHARB


Salicaceae


Populus ×canescens  (Ait.) Sm.
Grey Poplar
Introduced
Historic
CNH

Populus ×jackii  Sarg.
[Populus balsamifera  ×  P. deltoides]
Balm-of-Gilead
Introduced
Historic

Populus alba  L.
White or Silver Poplar
Introduced
Occasional
PHARB

Populus deltoides  Bartram ex Marsh.
Cottonwood
Introduced
Rare
CNH

Populus grandidentata  Michaux
Big-toothed Aspen
Native
Occasional
PHARB

Populus tremuloides  Michx.
Quaking Aspen
Native
Uncommon
PHARB

Salix ×conifera  Wangenh. (pro sp.)
[Salix discolor  ×  S. humilis]
Conifer Willow
Native
Historic

Salix ×smithiana  Willd.
Smith Willow
Introduced
Historic

Salix bebbiana  Sarg.
Bebb's or Long-beaked Willow
Introduced
Historic
CNH

Salix cinerea  ssp.  cinerea  L.
[Salix atrocinerea  Brotero]
Gray Willow
Introduced
Common
PHARB

Salix cinerea  ssp.  oleifolia  (Sm.) Macreight
Gray Willow
Introduced
Uncommon
CNH

Salix discolor  Muhl.
[Salix discolor  var.  latifolia  Andersson]
Large Pussy Willow
Native
Rare
PHARB

Salix humilis  Marsh
Prairie or Upland Willow
Native
Historic
CNH

Salix lucida  ssp.  lucida  Muhl.
Shinning Willow
Native
Historic
CNH

Salix nigra  Marsh.
Black Willow
Native
Rare
PHARB

Salix occidentalis
[Salix humilis  var.  microphylla  (Anderss.) Fern.]
Dwarf Prairie Willow
Native
Uncommon
PHARB

Salix pentandra  L.
Bayleaf or Laurel Willow
Only known county occurrence is from the Elizabeth Islands
Introduced
Historic
CNH

Salix purpurea  L.
Basket Willow, Purple Osier
Introduced
Historic
PHARB


Euphorbiaceae


Acalypha gracilens  Gray
Slender Three-seeded Mercury
Native
Rare
PHARB

Acalypha rhomboidea  Raf.
Broad Three-seeded Mercury
County Record (GP #16-157)
Native
Rare
PHARB

Acalypha virginica  L.
Three-seeded Mercury
Native, Watch List
Historic
CNH

Euphorbia cyparissias  L.
Cypress Spurge
Introduced, Potentially invasive
Uncommon
PHARB

Euphorbia helioscopia  L.
Sun Spurge
County Record (EL 2011)
Introduced
Rare
PHARB

Euphorbia maculata  L.
[Chamaesyce maculata  (L.) Small]
Milk Purslane, Spotted Spurge, Eyebane
Native
Common
PHARB

Euphorbia polygonifolia  L.
[Chamaesyce polygonifolia  (L.) Small]
Seaside Spurge
Native
Common
PHARB

Euphorbia virgata  Waldst. & Kit.
Slender Leafy Spurge
County Record (GP #19-48)
Introduced
Rare
PHARB


Linaceae


Linum intercursum  Bickn.
Sandplain Flax, Bicknell's Yellow Flax
Native, Watch List
Occasional
PHARB

Linum medium  var.  texanum  (Planchon) Fern.
Texan Flax or Common Yellow Flax
Native, Threatened
Rare
PHARB

Linum striatum  Walter
[Linum striatum  var.  multijugum  Fern.]
Ridgestem Yellow Flax
Native, Watch List
Historic
CNH

Linum usitatissimum  L.
Flax
Introduced
Historic

Linum virginianum  L.
Woodland, Spreading, or Common Yellow Flax
Native
Rare
PHARB


Fabaceae


Albizia julibrissin  Durazz.
Persian Silk Tree
County Record (GP #21-65)
Introduced
PHARB

Amphicarpaea bracteata  (L.) Fern.
[Amphicarpaea bracteata  var.  comosa  (L.) Fern.]
Hog Peanut
Native
PHARB

Apios americana  Medicus
Groundnut
Native
Occasional
PHARB

Baptisia tinctoria  (L.) R. Br. ex Aiton f.
[Baptisia tinctoria  f.  crebra  Fern.]
Yellow Wild Indigo, Rattleweed
Native
Common
PHARB

Chamaecrista fasciculata  (Michaux) Greene
[Cassia fasciculata  Michaux]
Partridge Pea
Native
Historic
CNH

Chamaecrista nictitans  ssp.  nictitans  (L.) Moench
[Cassia nictitans  L.]
Sensitive Plant
Native
Historic

Cytisus scoparius  var.  scoparius  (L.) Link
Scotch Broom
Introduced
Occasional
PHARB

Desmodium canadense  (L.) DC.
Canadian or Showy Tick Trefoil
Native
Historic
CNH

Desmodium ciliare  (Muhl. ex Willd.) DC.
Hairy Small-leaved Tick Trefoil
Native
Occasional
PHARB

Desmodium marilandicum  (L.) DC.
Maryland Tick Trefoil
Native
Historic

Desmodium obtusum  (Muhl. ex Willd.) DC.
[Desmodium rigidum  (Ell.) DC.]
Stiff Tick Trefoil
Native
Historic
CNH

Desmodium rotundifolium  DC.
Prostrate or Round-leaved Tick Trefoil
Native
Historic
CNH

Genista tinctoria  L.
Dyer's Greenweed, Woad Waxen, Whin
Only known county occurrence is from the Elizabeth Islands
Introduced
Rare
CNH

Gleditsia triacanthos  L.
Honey Locust
Native
Unknown
PHARB

Hylodesmum nudiflorum  (L.) H. Ohashi & R.R. Mill
[Desmodium nudiflorum  (L.) DC.]
Naked Tick Trefoil
Native
Uncommon
PHARB

Kummerowia striata  (Thunb.) Schindl.
Japanese Clover
County Record (GP #21-130)
Introduced
PHARB

Lathyrus japonicus  var.  maritimus  (L.) Kartesz & Gandhi
[Lathyrus japonicus  var.  glaber  (Ser.) Fern.]
Beach Pea
Native
Common
PHARB

Lathyrus latifolius  L.
Everlasting or Perennial Pea
Introduced
Occasional
PHARB

Lathyrus palustris  L.
[Lathyrus palustris  var.  myrtifolius  (Muhl. ex Willd.) Gray]
Marsh Pea, Vetchling
Previously historic, re-established in 2018 (GP #18-63)
Native, Watch List
Rare
PHARB

Lespedeza ×brittonii  Bicknell
[Lespedeza procumbens  ×  L. virginica]
Britton's Bush Clover
Native
Historic

Lespedeza ×nuttallii  Darl.
[Lespedeza hirta  var.  dissimulans  Fern.]
Nuttall's Bush Clover
Native
Historic

Lespedeza angustifolia  (Pursh) Ell.
Narrow-leaved Bush Clover
Native, Watch List
Rare
PHARB

Lespedeza bicolor  Turcz.
Shrubby Bush Clover
County Record (EL 2009)
Introduced
Rare
PHARB

Lespedeza capitata  Michaux
Round-headed Bush Clover
Native
Common
PHARB

Lespedeza cuneata  (Dum.-Cours.) G. Don
Chinese Bush Clover
County Record (KF 2011)
Introduced
Occasional
PHARB

Lespedeza cyrtobotrya  Miq.
Curved Bush Clover
Introduced
Rare
PHARB

Lespedeza hirta  ssp.  hirta  (L.) Hornem.
[Lespedeza hirta  ×  L. violacea]
Hairy Bush Clover
Native
Common
PHARB

Lespedeza procumbens  Michaux
Trailing Bush Clover
Native
Occasional
PHARB

Lespedeza stuevei  Nutt.
Stueve's or Velvety Bush Clover
Native, Watch List
Uncommon
PHARB

Lespedeza violacea  (L.) Pers.
[Lespedeza intermedia  (S. Watson) Britton]
Wand or Intermediate Bush Clover
Native
Uncommon
PHARB

Lespedeza virginica  (L.) Britton
Virginia or Slender Bush Clover
Native
Uncommon
PHARB

Lotus corniculatus  L.
Birdsfoot Trefoil
Introduced
Common
PHARB

Medicago falcata  L.
[Medicago sativa  ssp.  falcata  (L.) Arcang.]
Yellow Alfalfa
Introduced
Historic
CNH

Medicago lupulina  L.
Black Medick, Nonesuch
Introduced
Occasional
PHARB

Medicago sativa  L.
Blue Alfalfa
Introduced
Historic
CNH

Melilotus albus  Medicus
Sweet Clover
Introduced
Common
PHARB

Melilotus officinalis  (L.) Lam.
Yellow Sweet Clover
Introduced
Rare
PHARB

Phaseolus polystachios  (L.) B.S.P.
Wild Bean
Native
Historic

Pueraria montana  var.  lobata  (Willd.) Maesen & S. Almeida
Kudzu
Introduced, Invasive
Rare
PHARB

Robinia hispida  var.  hispida  L.
Bristly Locust, Rose Acacia
Introduced
Rare
PHARB

Robinia pseudoacacia  L.
Black Locust
Introduced, Invasive
Common
PHARB

Securigera varia  (L.) Lassen
[Coronilla varia  L.]
Crown Vetch
Introduced
Common
PHARB

Strophostyles helvola  (L.) Ell.
Beach or Wild Bean
Native
Occasional
PHARB

Strophostyles umbellata  (Muhl.) Britt.
Pink Wild Bean
Native
Historic

Tephrosia virginiana  (L.) Pers.
Goat's Rue
Native, Watch List
Common
PHARB

Trifolium arvense  L.
Rabbitfoot Clover
Introduced
Common
PHARB

Trifolium aureum  Pollich
[Trifolium agrarium  L.]
Palmate or Yellow Hop Clover
Introduced
Uncommon
PHARB

Trifolium campestre  Schreber
[Trifolium procumbens  L.]
Pinnate or Low Hop Clover
Introduced
Common
PHARB

Trifolium dubium  Sibth.
Little Hop Clover
Introduced
Common
PHARB

Trifolium hybridum  L.
Alsike Clover
Introduced
Historic, Waif
PHARB

Trifolium incarnatum  L.
Crimson or Italian Clover
Introduced
Rare
PHARB

Trifolium pratense  L.
[Trifolium pratense  var.  sativum  (P. Miller) Schreber]
Red Clover
Introduced
Common
PHARB

Trifolium repens  L.
White Clover
Introduced
Common
PHARB

Ulex europaeus  L.
Gorse, Furze, Whin
Introduced
Historic
CNH

Vicia cracca  ssp.  cracca  L.
Bird or Cow Vetch, Tufted Vetch
Introduced
Rare
PHARB

Vicia faba  L.
Broad Bean
Introduced
Historic, Waif

Vicia sativa  ssp.  nigra  (L.) Ehrh.
[Vicia angustifolia  var.  angustifolia  L.]
Narrow-leaved Vetch
Introduced
Rare
PHARB

Vicia tetrasperma  (L.) Schreber
[Vicia tetrasperma  var.  tenuissima  Druce]
Sparrow Vetch or Four-seeded Vetch
Introduced
Uncommon
PHARB

Vicia villosa  Roth
Hairy or Winter Vetch
Introduced
Common
PHARB

Wisteria floribunda  (Willd.) DC.
Japanese wisteria
County record (GP #17-11)
Introduced
Uncommon
PHARB


Polygalaceae


Polygala cruciata  var.  aquilonia  Fern. & Schub.
Cross-leaved Milkwort
Native
Uncommon
PHARB

Polygala nuttallii  Torrey & A. Gray
Nuttall's Milkwort
Native, Watch List
Occasional
PHARB

Polygala polygama  Walter
Racemed or Bitter Milkwort
Native
Occasional
PHARB

Polygala sanguinea  L.
Purple or Common Milkwort
Native
Occasional
PHARB

Polygala verticillata  L.
[Polygala verticillata  var.  isocycla  Fern.]
Whorled Milkwort
Native, Watch List
Rare
PHARB


Rosaceae


Agrimonia eupatoria  L.
Medicinal Agrimony
Introduced
Unknown

Agrimonia gryposepala  Wallr.
Common or Woodland Agrimony
Native
Uncommon
PHARB

Agrimonia pubescens  Wallr.
[Agrimonia bicknellii  (Kearney) Rydb.]
Downy Agrimony
Native, Threatened
Rare
PHARB

Agrimonia striata  Michx.
Woodland Agrimony
Native
Unknown

Amelanchier canadensis  (L.) Medicus
Juneberry, Eastern Serviceberry
Native
PHARB

Amelanchier laevis  Wieg.
[Amelanchier arborea  var.  laevis  (Wiegand)]
Smooth Shadbush or Serviceberry
Native
PHARB

Amelanchier nantucketensis  Bickn.
[Amelanchier stolonifera  f.  micropetala  (B.L. Robins). Rehder]
Nantucket Shadbush
Native, Watch List
Occasional
PHARB

Amelanchier spicata  (Lam.) K. Koch
[Amelanchier stolonifera  Wiegand]
Running Shadbush
Native
Rare
PHARB

Argentina egedii  ssp.  groenlandica  (Tratt.) A. Löve
[Potentilla egedii  var.  groenlandica  Tratt.]
Saltmarsh Silverweed
Native
Rare
PHARB

Aronia arbutifolia  (L.) Ell.
[Pyrus arbutifolia  (L.) L. f.]
Red Chokeberry
Native
Occasional
PHARB

Aronia floribunda  (Lindl.) Spach
[Aronia ×prunifolia  (Marsh.) Rehder]
Purple Chokeberry
Native
Occasional
PHARB

Aronia melanocarpa  (Michaux) Ell.
[Pyrus melanocarpa  (Michaux) Willd.]
Black Chokeberry
Native
Occasional
PHARB

Crataegus brainerdii  Sarg.
Brainerd's Hawthorn
Native
Historic

Crataegus chrysocarpa  var.  chrysocarpa  Ashe
Round-leaved or Fireberry Hawthorn
Native
Historic
CNH

Crataegus crus-galli  L.
[Crataegus crus-galli  var.  exigua  (Sarg.) Eggleston]
Cockspur Hawthorn
Introduced
PHARB

Crataegus flavida  Sarg.
Yellow Hawthorn
Native
Rare
PHARB

Crataegus macrosperma  Ashe
[Crataegus roanensis  Ashe]
Big-seeded Hawthorn
Native
Historic
CNH

Crataegus pruinosa  (Wendl. f.) K. Koch
[Crataegus rugosa  Ashe]
Frosted Hawthorn
Native
Historic
CNH

Crataegus schizophylla  Egglest.
Cut-leaf Hawthorn
Previously historic, re-established in 2007 (AH)
Native
Rare
PHARB

Fragaria vesca  L.
Woodland Strawberry
Introduced
Occasional

Fragaria virginiana  Duchesne
Common Strawberry
Native
PHARB

Geum aleppicum  var.  strictum  (Ait.) Clausen
[Geum strictum  Ait.]
Yellow Avens
Introduced
Historic

Geum canadense  var.  canadense  Jacq.
[Geum canadense  var.  camporum  (Rydb.) Fern. &]
White Avens
Native
Common
PHARB

Geum virginianum  L.
Virginia or Cream-colored Avens
Native, Watch List
Historic
CNH

Malus prunifolia  (Willd.) Borkh.
Plumleaf Crabapple
County Record (GP #21-79)
Introduced
PHARB

Malus pumila  P. Miller
Apple
Introduced
PHARB

Malus toringo  (Siebold) Siebold ex de Vriese
Siebold Crabapple
County Record (GP #21-93)
Introduced
PHARB

Potentilla argentea  L.
Silvery or Hoary Cinquefoil, Five-fingers
Introduced
Common
PHARB

Potentilla canadensis  L.
[Potentilla pumila  Poir.]
Dwarf Cinquefoil, Running Five-fingers
Introduced
Common
PHARB

Potentilla norvegica  L.
Three-finger, Rough Cinquefoil, Strawberry Weed
Native
Historic
PHARB

Potentilla recta  L.
Rough-fruited Cinquefoil, Sulphur Cinquefoil
Introduced
Occasional
PHARB

Potentilla simplex  Michaux
[Potentilla simplex  var.  calvescens  Fern.]
Old Field Cinquefoil, Five-fingers
Native
Common
PHARB

Prunus avium  (L.) L.
Sweet, Bing, or Mazzard Cherry
Introduced
Rare
PHARB

Prunus maritima  var.  maritima  Marsh.
Beach Plum
Native
Common
PHARB

Prunus nigra  Aiton
Canada or Horse Plum
Introduced
Historic, Waif
CNH

Prunus serotina  var.  serotina  Ehrh.
Black Cherry
Native
Common
PHARB

Prunus virginiana  var.  virginiana  L.
Choke Cherry
Native
Historic
CNH

Pyrus calleryana  Decne.
Bradford Pear
County Record (GP #19-02)
Introduced
Rare
PHARB

Pyrus communis  L.
European Pear
County Record (GP #19-14)
Introduced
Rare
PHARB

Rosa arvensis  Huds.
Field Rose
County Record (SS 2014)
Introduced
Rare
PHARB

Rosa carolina  ssp.  carolina  L.
Pasture or Carolina Rose
Native
Occasional
PHARB

Rosa luciae  Franch. & Rochebr. ex Crépin
Memorial Rose
County Record (GP #19-103)
Introduced
Uncommon
PHARB

Rosa multiflora  Thunb. ex Murray
Multiflora Rose
Introduced, Invasive
Common

Rosa nitida  Willd.
Shining Rose
Observed by MacKeever (notes) 1961, Chilmark
Native
Historic

Rosa palustris  Marsh.
Swamp Rose
Native
Uncommon
PHARB

Rosa rubiginosa  L.
[Rosa eglanteria  L.]
Sweetbrier, Eglantine
Introduced
Historic
CNH

Rosa rugosa  Thunb.
Saltspray or Japanese Rose
Introduced
Common
PHARB

Rosa virginiana  P. Miller
Low or Virginia Rose
Native
Common
PHARB

Rubus allegheniensis  Porter
Common, Sow-teat, or Allegheny Blackberry
Native
Common
PHARB

Rubus arenicola  Blanchard
New England Sand Blackberry
Native
Historic
CNH

Rubus bifrons  Vest ex Tratt.
Double-leaved Blackberry
Introduced
PHARB

Rubus canadensis  L.
Smooth Blackberry
Native
Historic

Rubus flagellaris  Willd.
Northern or Whip Dewberry
Native
Common
PHARB

Rubus frondosus  Bigelow
Leafy or Brainerd's Blackberry
Native
Historic
CNH

Rubus hispidus  L.
Swamp Dewberry
Native
Abundant
PHARB

Rubus idaeus  ssp.  strigosus  (Mich.) Focke
Wild Red Raspberry
Native
Historic

Rubus laciniatus  Willd.
Evergreen or Cut-leaved Blackberry
Introduced
Historic
CNH

Rubus occidentalis  L.
Black Raspberry
Native
PHARB

Rubus pensilvanicus  Poiret
Pennsylvania or Highbush Blackberry
Native
Historic
CNH

Rubus phoenicolasius  Maxim.
Wineberry
Introduced
Common
PHARB

Rubus pubescens  Raf.
Dwarf or Running Raspberry
Native
Historic

Rubus vermontanus  Blanchard
Vermont Blackberry
Native
Historic
CNH

Sorbaria sorbifolia  (L.) A. Braun
False Spiraea
County Record (GP #20-120)
Introduced
Rare
PHARB

Sorbus aucuparia  L.
European Mountain-ash
County Record (CS 2017)
Introduced
Rare

Spiraea alba  var.  latifolia  (Aiton) Dippel
[Spiraea latifolia  (Aiton) Borkh.]
Meadowsweet
Native
Historic
CNH

Spiraea tomentosa  L.
Steeple Bush, Hardhack
Native
Common
PHARB


Rhamnaceae


Berchemia scandens  (Hill) K. Koch
Supple-jack
Introduced
Unknown

Frangula alnus  P. Miller
[Rhamnus frangula  L.]
Glossy, Smooth, or European Buckthorn
Introduced, Invasive
Common
PHARB

Rhamnus cathartica  L.
Common Buckthorn
Introduced, Invasive
Historic
CNH


Elaeagnaceae


Elaeagnus angustifolia  L.
Russian Olive, Oleaster, Silverberry
Introduced
Rare
PHARB

Elaeagnus umbellata  var.  parvifolia  (Royle) Schneid.
Autumn Olive, Oleaster
Introduced, Invasive
Abundant
PHARB


Ulmaceae


Ulmus americana  L.
American Elm
Introduced
Historic
CNH


Cannabaceae


Humulus lupulus  L.
Hops
Previously historic, re-established in 2019 (GP #19-261)
Introduced
Rare
PHARB


Moraceae


Morus alba  L.
White Mulberry
Only known county occurrence is from the Elizabeth Islands
Introduced
Historic
CNH


Urticaceae


Boehmeria cylindrica  (L.) Sw.
[Boehmeria cylindrica  var.  drummondiana  (Weddell) Weddell]
False Nettle, Bog Hemp
Native
Common
PHARB

Pilea pumila  (L.) A. Gray
Clearweed, Richweed
Previously historic, re-established in 2010 (MDC #2038)
Native
Uncommon
PHARB

Urtica dioica  ssp.  dioica  L.
Stinging Nettle
Introduced
Rare
PHARB

Urtica dioica  ssp.  gracilis  (Aiton) Selander
[Urtica dioica  var.  procera  (Muhl. ex Willd.)]
Slender Stinging Nettle
Native
Rare
PHARB


Cucurbitaceae


Cucumis melo  L.
Cantaloupe, Honeydew Melon
Introduced
Unknown

Cucurbita maxima  Dcne.
Squash
Only known county occurrence is from the Elizabeth Islands
Introduced
Unknown
CNH

Echinocystis lobata  (Michaux) Torrey & A. Gray
Wild or Prickly Cucumber
Observed by MacKeever (notes) 1960, Edgartown
Introduced
Historic

Sicyos angulatus  L.
Bur Cucumber
Native
Unknown


Fagaceae


Castanea crenata  Siebold & Zucc.
Korean Chestnut
New England Record (GP #20-189)
Introduced
Rare
PHARB

Castanea dentata  (Marsh.) Borkh.
American Chestnut
Native
Historic
CNH

Castanea mollissima  Blume
Chinese Chestnut
Introduced
PHARB

Fagus grandifolia  Ehrh.
[Fagus grandifolia  var.  caroliniana  (Loudon) Fern. &]
American Beech
Native
Common
CNH

Quercus ×faxonii  Trel.
Faxon's hybrid oak
Native
PHARB

Quercus ×fernowii  Trel.
[Quercus alba  ×  Quercus stellata]
Hybrid Oak
Native
Unknown

Quercus ×rehderii  Trel.
[Quercus ilicifolia  ×  Q. velutina]
Rehder's Oak
Previously historic, re-established in 2003 (TB)
Native
PHARB

Quercus ×stelloides  Palmer
[Quercus prinoides  ×  Q. stellata]
Stelloides Oak
Previously historic, re-established in 2017 (TB)
Native
PHARB

Quercus alba  L.
White Oak
Native
Common
PHARB

Quercus coccinea  Muenchh.
Scarlet Oak
Native
Uncommon
PHARB

Quercus ilicifolia  Wangenh.
Scrub, Bear, or Holly-leaved Oak
Native
Common
PHARB

Quercus prinoides  Willd.
[Quercus prinoides  var.  rufescens  Rehder]
Dwarf Chinquapin Oak or Dwarf Chestnut Oak
Native
Common
PHARB

Quercus robur  L.
English Oak
Previously historic, re-established in 2010 (KF,TB)
Introduced
Uncommon
PHARB

Quercus rubra  L.
[Quercus rubra  var.  ambigua  (A. Gray) Fern.]
Red Oak
Only known county occurrence is from the Elizabeth Islands
Introduced
Historic
CNH

Quercus stellata  Wangenh.
Post Oak
Native, Watch List
Occasional
PHARB

Quercus velutina  Lam.
Black Oak
Native
Abundant
PHARB


Myricaceae


Comptonia peregrina  (L.) Coulter
Sweet Fern
Native
Common
PHARB

Morella caroliniensis  (Mill.) Small
[Myrica pensylvanica  Loisel.]
Bayberry, Wax Myrtle
Native
Common
PHARB

Myrica gale  L.
Sweet Gale
Native
Occasional
PHARB


Juglandaceae


Carya glabra  (P. Mill) Sweet
[Carya ovalis  (Wangenh.) Sarg.]
Pignut Hickory
Native
Common
PHARB

Carya ovata  (Mill.) K. Koch
Shagbark Hickory
County Record (GP #21-187)
Native
Rare
PHARB

Carya tomentos  (Poir. in Lam.) Nutt.
[Carya alba  (L.) Nutt. ex Ell.]
Mockernut or White-hearted Hickory
Native
Common
PHARB


Betulaceae


Alnus glutinosa  (L.) Gaertn.
European Alder
County Record (GP #20-111)
Introduced
Rare
PHARB

Alnus incana  ssp.  rugosa  (Du Roi) Clausen
[Alnus rugosa  (Du Roi) Spreng.]
Speckled Alder
Native
Common
PHARB

Alnus serrulata  (Aiton) Willd.
[Alnus serrulata  var.  subelliptica  Fern.]
Smooth Alder
Native
Uncommon
PHARB

Betula papyrifera  Marsh.
Paper Birch
Introduced
Rare
CNH

Betula pendula  Roth
Silver or Weeping Birch
Introduced
Rare
PHARB

Betula populifolia  Marsh.
Gray Birch
Native
Common
PHARB

Betula pubescens  ssp.  pubescens  Ehrh.
[Betula alba  var.  pubescens  (Ehrh.) Spach]
White Birch
Only known county occurrence is from the Elizabeth Islands
Introduced
Historic
CNH

Carpinus caroliniana  ssp.  virginiana  (Marsh.) Furlow
Ironwood, Hornbeam, Blue Beech
Native
Rare
PHARB

Corylus americana  Walter
Hazelnut, American Filbert
Native
Common
PHARB

Corylus cornuta  Marsh.
Beaked Hazelnut
Native
Occasional
PHARB

Ostrya virginiana  (P. Miller) K. Koch
Hop Hornbeam, Ironwood
Native
Uncommon
PHARB


Geraniaceae


Erodium cicutarium  ssp.  cicutarium  (L.) L'Hér. ex Aiton
Redstem Felaree
Introduced
Uncommon
PHARB

Geranium carolinianum  L.
Carolina Cranesbill
Native
Rare
PHARB

Geranium maculatum  L.
Wild Geranium, Spotted Cranesbill
Native
Common
PHARB

Geranium pusillum  L.
Small or Slender Cranesbill
Introduced
Historic

Geranium robertianum  L.
Herb-robert
County Record (2014)
Native
Occasional
PHARB

Geranium thunbergii  Siebold ex Lindl. & Paxton
Japanese Cranesbill
County Record (GP #21-151)
Introduced
PHARB


Onagraceae


Chamerion angustifolium  ssp.  circumvagum  (Mosq.) Kartesz
[Epilobium angustifolium  L.]
Fireweed, Great Willow-herb
Native
Unknown
CNH

Circaea canadensis  ssp.  canadensis  (L.) Hill
[Circaea lutetiana  ssp.  canadensis  L.]
Enchanter's Nightshade
Native
Common
PHARB

Epilobium ciliatum  Raf.
[Epilobium glandulosum  var.  adenocaulon  (Hauskk.) Fern.]
American or Glandular Willow-herb
Native
Occasional
PHARB

Epilobium coloratum  Biehler
Purple-leaved Willow-herb
Native
Occasional
PHARB

Epilobium hirsutum  L.
Hairy Willow-herb
Introduced
Historic
CNH

Epilobium leptophyllum  Raf.
Narrow-leaved Willow-herb
Native
Historic
PHARB

Epilobium palustre  L.
[Epilobium palustre  var.  grammadophyllum  Haussk.]
Marsh Willow-herb
Only known county occurrence is from the Elizabeth Islands
Native
Historic
CNH

Epilobium strictum  Muhl. ex Sprengel
Downy Willow-herb
Native
Historic
CNH

Ludwigia alternifolia  L.
Seedbox, Square-pod Water Primrose
Native
Rare
PHARB

Ludwigia palustris  (L.) Elliott
[Ludwigia palustris  var.  americana  (DC.) Fern. Griscom]
Water Purslane, Mud Loosestrife
Native
Common
PHARB

Oenothera biennis  L.
[Oenothera biennis  var.  pycnocarpa  (Atkinson & Bartlett)]
Evening Primrose
Native
Common
PHARB

Oenothera fruticosa  ssp.  fruticosa  L.
[Oenothera fruticosa  var.  linearis  Michaux S. Watson]
Bushy Evening Primrose, Sundrops
Native
Unknown

Oenothera gaura  W. L. Wagner & Hoch
[Gaura biennis  L.]
Biennial Bee-blossom
County Record (GP, EL 2013)
Introduced
Rare
PHARB

Oenothera glazioviana  Micheli
[Oenothera erythrosepala  Borbás]
Garden or Showy Evening Primrose
Only known county occurrence is from the Elizabeth Islands
Introduced
Historic
CNH

Oenothera oakesiana  (A. Gray) Robbins ex S. Watson & Coulter
[Oenothera cruciata  var.  stenopetala  Fern.]
Cross-shaped Evening Primrose
Native
Uncommon
PHARB

Oenothera parviflora  L.
Small-flowered Evening Primrose
Native
Common
PHARB

Oenothera perennis  L.
Little or Small Sundrops
Native
Historic
CNH


Lythraceae


Decodon verticillatus  (L.) Ell.
[Decodon verticillatus  var.  laevigatus  Torrey & Gray]
Water Willow, Water Oleander, Swamp Loosestrife
Native
Abundant
PHARB

Lythrum salicaria  L.
[Lythrum salicaria  var.  gracilior  Turcz.]
Purple of Spiked Loosestrife
Introduced, Invasive
Uncommon
PHARB


Melastomataceae


Rhexia virginica  L.
Northern Meadow Beauty
Native
Occasional
PHARB


Anacardiaceae


Rhus ×pulvinata  Greene (pro sp.)
[Rhus glabra  ×  R. hirta]
Pulvinate Sumac
Native
Unknown

Rhus copallinum  var.  latifolia  Engler
Winged Sumac
Native
Common
PHARB

Rhus glabra  L.
[Rhus borealis  Greene]
Smooth Sumac
Native
Occasional
PHARB

Rhus hirta  (L.) Sudworth
[Rhus typhina  L.]
Staghorn Sumac
Native
Occasional
PHARB

Toxicodendron radicans  ssp.  radicans  (L.) Kuntze
[Rhus radicans  L.]
Poison Ivy
Native
abundant

Toxicodendron vernix  (L.) Kuntze
[Rhus vernix  L.]
Poison Sumac
Native
Occasional
CNH


Sapindaceae


Acer negundo  var.  negundo  L.
Boxelder
County Record (GP #20-33)
Introduced
Rare
PHARB

Acer platanoides  L.
Norway Maple
Introduced, Invasive
Common
PHARB

Acer pseudoplatanus  L.
Sycamore Maple
Introduced, Invasive
Common
PHARB

Acer rubrum  L.
Red Maple
Native
Abundant
PHARB


Simaroubaceae


Ailanthus altissima  (P. Mill.) Swingle
Tree-of-Heaven
Introduced, Invasive
Common
PHARB


Cistaceae


Crocanthemum bicknellii  (Fern.) Barnh.
[Helianthemum bicknellii  Fern.]
Bicknell's Frostweed, Rockrose
Native
Common
PHARB

Crocanthemum canadense  (L.) Britt.
[Helianthemum canadense  (L.) Michaux]
Canadian Frostweed or Rockrose
Native
Common
PHARB

Crocanthemum dumosum  Bicknell
[Helianthemum dumosum  (Bicknell) Fern.]
Bushy Frostweed, Rockrose
Native, Watch List
Unknown
PHARB

Crocanthemum propinquum  (Bicknell) Bicknell
[Helianthemum propinquum  Bicknell]
Low Frostweed or Rockrose
Native
Common
PHARB

Hudsonia ericoides  ×  H. tomentosa  Nutt.
Hybrid Beach Heather
Native
Historic
PHARB

Hudsonia ericoides  L.
Golden Heather
Native
Common
PHARB

Hudsonia tomentosa  Nutt.
[Hudsonia tomentosa  var.  intermedia  Peck]
Hudsonia, Beach Heather
Native
Common
PHARB

Lechea maritima  var.  maritima  Leggett ex B.S.P.
Beach Pinweed
Native
Occasional
PHARB

Lechea minor  L.
Thyme-leaved Pinweed
Native, Watch List
Occasional
PHARB

Lechea mucronata  Raf.
[Lechea villosa  Ell.]
Hairy Pinweed
Native
Occasional
PHARB

Lechea pulchella  var.  pulchella  Raf.
[Lechea leggettii  Britton & Hollick]
Leggett's Pinweed
Native
Common
PHARB


Malvaceae


Abutilon theophrasti  Medik.
Velvet Leaf
Previously historic, re-established in 2009 (MDC #1929)
Introduced
Rare
PHARB

Hibiscus moscheutos  L.
[Hibiscus palustris  L.]
Rose, Swamp, or Seaside Mallow
Native
Common
PHARB

Hibiscus trionum  L.
Flower-of-an-hour
Introduced
Unknown

Malva moschata  L.
Musk Mallow
Introduced
Historic
CNH

Malva neglecta  Wallr.
[Malva rotundifolia  auct. non L.]
Cheeses, Common Mallow
Introduced
Rare
PHARB

Tilia ×vulgaris  Hayne
[Tilia cordata  ×  T. platyphyllos]
Linden
Introduced
unknown


Brassicaceae


Alliaria petiolata  (Bieb.) Cavara & Grande
Garlic Mustard
County Record (GP#16-27)
Introduced, Invasive
Common
PHARB

Arabidopsis thaliana  (L.) Heynh.
Mouse Ear Cress
Introduced
Common
PHARB

Armoracia rusticana  Gaertner, Meyer, & Scherb.
[Armoracia lapathifolia  Gilib.]
Horse Radish
Introduced
Unknown

Barbarea verna  (P. Miller) Ascherson
Early Winter Cress
Introduced
Common
PHARB

Barbarea vulgaris  Ait. f.
[Barbarea vulgaris  var.  arcuata  Opiz ex Fries]
Winter Cress
Introduced
Occasional
PHARB

Berteroa incana  (L.) DC.
Hoary Alyssum
Introduced
Historic
CNH

Brassica juncea  (L.) Czern.
Brown Mustard
Introduced
Historic
CNH

Brassica nigra  (L.) W.D.J. Koch
Black Mustard
Introduced
Uncommon
PHARB

Brassica rapa  L.
[Brassica rapa  ssp.  campestris  (L.) Clapham]
Turnip, Field Mustard, Chinese Cabbage
Introduced
Historic
CNH

Cakile edentula  ssp.  edentula  (Bigelow) Hooker
Sea Rocket
Native
Common
PHARB

Capsella bursa-pastoris  (L.) Medik.
Shepard's Purse
Introduced
Occasional
PHARB

Cardamine hirsuta  L.
Hairy Bittercress
County Record (EL 2013)
Introduced
Common
PHARB

Cardamine pensylvanica  Muhl. ex Willd.
Common Bittercress
Native
Rare
PHARB

Draba verna  L.
[Erophila verna  (L.) Besser]
Shortpod Whitlow Grass
Introduced
Common
PHARB

Erysimum cheiranthoides  L.
Wormseed Wallflower
Introduced
PHARB

Hesperis matronalis  L.
Dame's Rocket
Introduced, Invasive
Uncommon
PHARB

Lepidium campestre  (L.) Aiton f.
Cow or Field Cress
Introduced
Common
PHARB

Lepidium virginicum  var.  virginicum  L.
Wild Peppergrass, Poor Man's Pepper
Native
Common
PHARB

Lobularia maritima  (L.) Desv.
Sweet or Seaside Alyssum
Introduced
Rare
PHARB

Lunaria annua  L.
Annual Honesty
County Record (TB 2011)
Introduced
Occasional
PHARB

Nasturtium officinale  Aiton f.
[Rorippa nasturtium-aquaticum  (L.) Hayek]
Water Cress
Introduced
Rare
PHARB

Nastutium microphyllum  Boenn. ex Reichenb.
One-rowed Water-cress
County Record (MDC 2009)
Introduced
Uncommon
PHARB

Raphanus raphanistrum  L.
Wild Radish
Introduced
Occasional
PHARB

Raphanus sativus  L.
Garden Radish
Introduced
Unknown

Rorippa palustris  var.  palustris  (L.) Besser
Common Yellowcress
Native
Rare
PHARB

Sinapis alba  L.
[Brassica hirta  Moench]
White Mustard
Introduced
Historic
CNH

Sisymbrium altissimum  L.
Tumbling or Jim Hill Mustard
Introduced
Historic
CNH

Sisymbrium officinale  (L.) Scop.
[Sisymbrium officinale  var.  leiocarpum  DC.]
Hedge Mustard
Introduced
Historic
CNH

Teesdalia nudicaulis  (L.) Ait. f.
Common shepherd's-cress
County Record (GP #16-32)
Introduced
Occasional
PHARB

Thlaspi arvense  L.
Penny Cress
Introduced
Occasional
PHARB


Santalaceae


Comandra umbellata  ssp.  umbellata  (L.) Nutt.
Bastard Toadflax
Native
Common
PHARB


Droseraceae


Drosera filiformis  var.  filiformis  Raf.
Thread-leaved Sundew
Native
Unknown

Drosera intermedia  Hayne
Spatulate-leaved Sundew
Native
Uncommon
PHARB

Drosera rotundifolia  L.
Round-leaved Sundew
Native
Uncommon
PHARB


Plumbaginaceae


Limonium carolinianum  (Walter) Britton
[Limonium nashii  Small]
Sea Lavender, Marsh Rosemary, Blue Statice
Native
Common
PHARB


Polygonaceae


Fagopyrum esculentum  Moench
[Fagopyrum sagittatum  Gilib.]
Buckwheat
Introduced
PHARB

Fallopia convolvulus  (L.) A. Löve
[Polygonum convolvulus  L.]
Black Bindweed, False Buckwheat
Introduced
Historic
CNH

Fallopia dumetorum  (L.) Holub
Thicket Bindweed
County Record (GP #19-159)
Introduced
PHARB

Fallopia japonica  var.  japonica  (Houtt.) R. Decr.
[Polygonum cuspidatum  Sieb. & Zucc.]
Japanese Knotweed, Boston Bamboo
Introduced, Invasive
Common
PHARB

Fallopia scandens  (L.) Holub
[Polygonum scandens  var.  scandens  L.]
Climbing False Buckwheat, Bindweed
Native
Occasional
PHARB

Persicaria arifolia  (L.) Haroldson
[Periscaria arifolium  var.  pubescens  (keller) Fern]
Halberd-leaved Smartweed
Native
Rare
PHARB

Persicaria careyi  (Olney) Greene
[Polygonum careyi]
Carey's Knotweed or Smartweed
Native
Historic
CNH

Persicaria coccinea  (Muhl. ex Willd.) Greene
Scarlet Smartweed
Native
Historic
PHARB

Persicaria hydropiper  (L.) Opiz
Water-pepper Smartweed
Introduced
Rare
PHARB

Persicaria hydropiperoides  (Michaux) Small
[Polygonum hydropiperoides  Michx.]
False or Mild Water-pepper
Native
Occasional
PHARB

Persicaria lapathifolia  (L.) S.F. Gray
[Polygonum lapathifolium  salicifolium  Sibthorp]
Willow-weed, Nodding or Dockleaf Smartweed
Native
PHARB

Persicaria longiseta
Oriental Lady's-thumb Smartweed
County Record (GP #16-119)
Introduced
Occasional
PHARB

Persicaria maculosa  S.F. Gray
[Polygonum persicaria  L.]
Lady's Thumb
Introduced
Common
PHARB

Persicaria orientalis  (L.) Spach
[Polygonum orientale  L.]
Kiss-Me-Over-the-Garden-Gate
Introduced
Historic
CNH

Persicaria pensylvanica  (L.) G. Maza
[Polygonum pensylvanicum  L.]
Pinkweed, Smartweed
Native
Occasional
PHARB

Persicaria perfoliata  (L.) H.Gross
Asiatic Smartweed
County Record (GP #19-23)
Introduced
Rare
PHARB

Persicaria punctata  (Ell.) Small
[Polygonum punctatum  Ell.]
Annual or Duck Smartweed
Native
Common
PHARB

Persicaria sagittata  (L.) H. Gross
[Polygonum sagittatum  (L.) H. Gross]
Arrow-leaf Tearthumb
Native
Common
PHARB

Persicaria virginiana  (L.) Gaertn.
[Persicaria virginiana  var.  filiformis  (Thunb.) J.M.H.Shaw]
Jumpseed
County Record (GP #18-158)
Introduced
Rare
PHARB

Polygonum articulatum  L.
[Polygonella articulata  (L.) Meisner]
Jointweed
Native
Occasional
PHARB

Polygonum aviculare  ssp.  neglectum  (Bess.) Arcang.
Dooryard Knotweed
Introduced
Common
PHARB

Polygonum buxiforme  Small
[Polygonum aviculare  var.  vegetum  Ledeb.]
Box-leaf Knotweed
Native
Historic
CNH

Polygonum glaucum  Nutt.
Seaside Knotweed
Native, Special Concern
Occasional
PHARB

Polygonum ramosissimum  ssp.  prolificum  (Small) Costea & Tardif
[Polygonum prolificum  (Small) Robinson]
Saltmarsh or Bushy Smartweed
Native
Historic

Polygonum ramosissimum  ssp.  ramosissimum  Michaux
[Polygonum exsertum  Small]
Saltmarsh or Bushy Smartweed
Native
Historic

Rumex ×pratensis  Mertens & Koch
[Rumex ×acutus]
Hybrid Dock
Introduced
Historic

Rumex acetosella  ssp.  pyrenaicus  (Pourret ex Lapeyr.) Akeroyd
[Rumex acetosella  ssp.  angiocarpus  auct. non (Murb.)]
Sheep or Red Sorrel
Introduced
abundant
PHARB

Rumex britannica  L.
[Rumex orbiculatus  A. Gray]
Great Water-dock
Native
Occasional
PHARB

Rumex crispus  ssp.  crispus  L.
Curly or Sour Dock
Introduced
Common
PHARB

Rumex obtusifolius  ssp.  obtusifolius  L.
Bitter or Red-veined Dock
Introduced
Common
PHARB

Rumex persicarioides  var.  fueginus  (Phil.) A. Haines
[Rumex maritimus  var.  persicarioides  (L.) R.S. Mitchell]
American Golden Dock
Native
Uncommon
PHARB

Rumex persicarioides  var.  persicardiodes  L.
American Golden Dock
Native
Rare
PHARB

Rumex triangulivalvis  (Danser) Rech. f.
[Rumex salicifolius  (Danser) Rech. f.]
Willow-leaf Dock
Introduced
Historic
CNH

Rumex verticillatus  L.
Swamp Dock, Water Dock
Native, Threatened
Unknown


Caryophyllaceae


Agrostemma githago  var.  githago  L.
Corn Cockle
Introduced
Historic
CNH

Arenaria serpyllifolia  L.
[Arenaria serpyllifolia  var.  tenuior  Mert. & Koch]
Thyme-leaved Sandwort
Introduced
Historic
PHARB

Atocion armeria  (L.) Raf.
Garden Catchfly
Introduced
Historic

Cerastium fontanum  ssp.  vulgare  (Hartman) Greuter & Burdet
[Cerastium vulgatum  L.]
Mouse-ear Chickweed
Introduced
Abundant
PHARB

Cerastium glomeratum  Thuill.
[Cerastium viscosum  auct. non L.]
Sticky Mouse-ear Chickweed
Supposedly reported from Edgartown
Introduced
Historic

Cerastium semidecandrum  L.
Chickweed
Observed by B. Sorrie (notes) 1980, Oak Bluffs
Introduced
Historic

Dianthus armeria  L.
Deptford Pink
Introduced
Occasional
PHARB

Dianthus barbatus  L.
Sweet William
Only known county occurrence is from the Elizabeth Islands
Introduced
Historic
CNH

Dianthus deltoides  L.
Maiden Pink
Introduced
Historic
CNH

Dianthus plumarius  L.
Garden or Grass Pink
Introduced
Historic

Gypsophila paniculata  L.
Baby's Breath
Only known county occurrence is from the Elizabeth Islands
Introduced
Historic
CNH

Honckenya peploides  ssp.  robusta  (Fern.) Hultén
[Arenaria peploides  var.  robusta  Fern.]
Sea Purslane
Native
Occasional
PHARB

Lychnis coronaria  (L.) Murr.
Mullein Lychnis
County Record (GP 2014)
Introduced
Rare
PHARB

Lychnis flos-cuculi  L.
Ragged Robin Lychnis
County Record (GP #20-64)
Introduced
Rare
PHARB

Moehringia lateriflora  (L.) Fenzl
[Arenaria lateriflora  L.]
Gove Sandwort
Native
Uncommon
PHARB

Sagina decumbens  ssp.  decumbens  (Ell.) Torrey & A. Gray
Trailing Pearlwort
Native, Watch List
Historic
PHARB

Sagina japonica  (Sw.) Ohwi
Japanese Pearlwort
County Record (GP #17-03)
Introduced
Rare
PHARB

Sagina procumbens  L.
Matted Pearlwort, Birdseye
Native
Rare
PHARB

Saponaria officinalis  L.
Bouncing Bet, Soapwort
Introduced
Common
PHARB

Scleranthus annuus  L.
Annual Knawel
Introduced
Uncommon
PHARB

Silene antirrhina  L.
Sleepy Catchfly
Native
Unknown

Silene dioica  (L.) Clairville
[Lychnis dioica  L.]
Red Campion or Cockle
Introduced
Historic
CNH

Silene latifolia  ssp.  alba  (P. Mill.) Greuter & Burdet
[Silene alba  (P. Mill.)]
White Campion or Cockle
Introduced
Occasional
PHARB

Silene noctiflora  L.
Night-flowering Catchfly
Introduced
unknown, waif

Silene pendula  L.
Nodding Catchfly
Introduced
Historic

Silene vulgaris  ssp.  vulgaris  (Moench) Garcke
[Silene cucubalus  Wibel]
Bladder Campion
Introduced
Uncommon
PHARB

Spergula arvensis  L.
Spurrey, Corn Spurrey
Introduced
Historic
CNH

Spergularia canadensis  ssp.  canadensis  (Pers.) G. Don
Northern or Lesser Sand Spurrey
Native
Historic
CNH

Spergularia marina  (L.) Griseb.
[Spergularia salina  J. & K. Presl]
Saltmarsh Sand Spurrey
Native
Uncommon
PHARB

Spergularia rubra  (L.) J. & K. Presl
Red, Roadside, or Common Sand Spurrey
Introduced
Occasional
PHARB

Stellaria graminea  L.
Common, Meadow, or Field Stichwort
Introduced
Uncommon
PHARB

Stellaria media  (L.) Vill.
Common Chickweed
Introduced
Common
PHARB


Amaranthaceae


Amaranthus albus  L.
Tumbleweed
Introduced
Historic
CNH

Amaranthus blitoides  S. Watson
Prostrate Amaranth
Introduced
Historic
CNH

Amaranthus blitum  L.
Purple Amaranth
County Record (GP #21-123)
Introduced
PHARB

Amaranthus hybridus  L.
Green Amaranth
County Record (GP #16-107)
Introduced
Rare
PHARB

Amaranthus pumilus  Raf.
Seabeach Amaranth
Native
Historic

Amaranthus retroflexus  L.
Pigweed
Introduced
Rare
PHARB

Atriplex cristata  Humb. & Bonpl. ex Willd.
[Atriplex pentandra  (Jacq.) Standley]
Seabeach or Sand Orache
Native
Occasional
PHARB

Atriplex glabriuscula  Edmonston
Bracted Orache
County Record (GP #20-263)
Native
Rare
PHARB

Atriplex patula  L.
Narrow-leaved Orache
Introduced
Historic

Atriplex prostrata  Boucher ex DC.
[Atriplex patula  var.  hastata  auct. non (L.) Gray]
Halberd-leaf Orache
Native
Common
PHARB

Bassia hirsuta  (L.) Aschers.
Downy Seabite
Only known county occurrence is from the Elizabeth Islands
Introduced
Historic
CNH

Chenopodium album  L.
[Chenopodium album  var.  missouriense  (Aellen) Bassett &]
Pigweed, Lamb's Quarters
Introduced
Common
PHARB

Chenopodium berlandieri  var.  macrocalycium  (Aellen) Cronq.
[Chenopodium macrocalycium  Aellen]
Pitseed Pigweed
Native
Common
PHARB

Chenopodium glaucum  var.  glaucum  L.
Oak-leaf Goosefoot, Saltpond Goosefoot
Introduced
Common
PHARB

Chenopodium leptophyllum  (Moq.) Nutt. ex S. Wats.
Narrow-leaved Goosefoot
Introduced
Historic
CNH

Chenopodium pratericola  Rydb.
[Chenopodium desiccatum  var.  leptophylloides  (J. Murr.) Wahl]
White Pigweed
Only known county occurrence is from the Elizabeth Islands
Native
Historic
CNH

Chenopodium rubrum  L.
Coast Blite, Red Goosefoot
Native
Rare
PHARB

Chenopodium strictum
Oval-seeded Goosefoot
County Record (GP #17-166)
Introduced
Rare
PHARB

Dysphania ambrosioides  L.
[Chenopodium ambrosioides  L.]
Wormseed, Mexican Tea
Introduced
Occasional
PHARB

Dysphania pumilio  (R. Br.) Mosyakin & Clemants
[Chenopodium pumilio  R. Br.]
Ridged Goosefoot, Pygmy Goosefoot
Only known county occurrence is from the Elizabeth Islands
Introduced
Occasional
CNH

Salicornia ambigua  Michx.
[Salicornia virginica  L.]
Perennial Saltwort, Glasswort
Native
Common
PHARB

Salicornia biglovii  Torr.
Dwarf Glasswort
Native
Rare
PHARB

Salicornia depressa  Standl.
Common Glasswort
Native
Common
PHARB

Salsola kali  ssp.  kali  L.
Prickly Saltwort
Introduced
Common
PHARB

Salsola kali  ssp.  pontica  (Pallas) Mosyakin
[Salsola caroliniana  Walter]
Carolina Saltwort
Only known county occurrence is from the Elizabeth Islands
Introduced
Historic
CNH

Suaeda calceoliformis  (Hook.) Moq.
American Sea-blite
Native, Special Concern
Rare
PHARB

Suaeda linearis  (Ell.) Moq.
Slender or Erect Sea-blite
Native
Uncommon
PHARB

Suaeda maritima  ssp.  maritima  (L.) Dumort.
Saltmarsh Sea-blite
Native
Common
PHARB

Suaeda maritima  ssp.  richii  (Fern.) Bassett & Crompton
Herbaceous Sea-blite
County Record (GP #20-259)
Native
Rare
PHARB


Phytolaccaceae


Phytolacca americana  var.  americana  L.
Pokeweed, Pokeberry, Poke
Native
Common
PHARB


Nyctaginaceae


Mirabilis nyctaginea  (Michaux) MacMillan
Four-o'clock, Heart-leaved Umbrellawort
Introduced
Rare
PHARB


Molluginaceae


Mollugo verticillata  L.
Carpetweed, Indian Chickweed
Introduced
Common
PHARB


Portulacaceae


Portulaca oleracea  L.
Common Purslane, Pusley
Introduced
Occasional
PHARB


Cactaceae


Opuntia humifusa  (Raf.) Raf.
Eastern Prickly Pear
Native, Endangered
Rare
PHARB


Hydrangeaceae


Hydrangea paniculata  Siebold
Panicle Hydrangea
County Record (GP #21-132)
Introduced
Waif
PHARB


Cornaceae


Benthamidia florida  (L.) Spach
[Cornus florida  L.]
Flowering Dogwood
Native
Uncommon
PHARB

Chamaepericlymenum canadense  (L.) Aschers. & Graebn.
[Cornus canadensis  L.]
Bunchberry, Dwarf Cornell
Native
Historic
CNH

Nyssa sylvatica  Marshall
Beetlebung, Black or Sour Gum, Tupelo, Pepperidge
Native
Common
PHARB

Swida alternifolia  (L. f.) Small
[Cornus alternifolia  L. f.]
Pagoda or Alternate-leaved Dogwood
Native
Uncommon
PHARB

Swida racemosa  (Lam.) Moldenke
[Cornus racemosa  Lam.]
Northern Swamp Dogwood, Gray or White Dogwood
Previously historic, re-established in 2015 (GP #15-06)
Native
Rare
PHARB

Swida sericea  (L.) Holub
[Cornus sericea  L.]
Red-osier Dogwood
County Record (TB 2008)
Introduced
Occasional
PHARB


Balsaminaceae


Impatiens balfourii  Hook. f.
Balfour's Touch-me-not
County Record (GP #21-166)
Introduced
PHARB

Impatiens capensis  Meerb.
Jewelweed
Native
Common
PHARB


Theophrastaceae


Samolus valerandi  ssp.  parviflorus  (Raf.) Hultén
Water Pimpernel, Brookweed
Native
Occasional
PHARB


Primulaceae


Hottonia inflata  Ell.
Featherfoil, Water Violet
Native, Watch List
Rare
PHARB

Lysimachia arvensis  (L.) U.Manns & Anderb.
[Anagallis arvensis  L.]
Scarlet Pimpernel
Introduced
Occasional
PHARB

Lysimachia borealis  (Raf.) U Manns & A. Anderb.
[Trientalis borealis  ssp.  borealis  Raf.]
Starflower
Native
Common
PHARB

Lysimachia ciliata  L.
Fringed Loosestrife
Native
Historic
CNH

Lysimachia clethroides  Duby
Gooseneck Yellow-loosestrife
County Record (GP #18-80)
Introduced
Rare
PHARB

Lysimachia maritima  (L.) Galasso, Banfi, & Soldano
[Glaux maritima  L.]
Sea Milkwort
Native
Unknown

Lysimachia nummularia  L.
Creeping Yellow-loosestrife
County Record (GP 2014)
Introduced, Invasive
Rare
PHARB

Lysimachia punctata  L.
Spotted or Garden Loosestrife
Introduced
Rare
PHARB

Lysimachia quadrifolia  L.
Whorled Loosestrife
Native
Common
PHARB

Lysimachia terrestris  (L.) B.S.P.
Swamp Candles, Swamp or Bulbil Loosestrife
Native
Common
PHARB


Styracaceae


Styrax japonicus  Siebold & Zucc.
Japanese Snowbell
County Record (GP #19-203)
Introduced
Rare
PHARB


Sarraceniaceae


Sarracenia purpurea  L.
Pitcher-plant
Native
Rare
PHARB


Clethraceae


Clethra alnifolia  L.
Summersweet, Sweet Pepper Bush, White Alder
Native
Abundant
PHARB


Ericaceae


Arctostaphylos uva-ursi  (L.) Sprengel
Bearberry, Kinnikinnik
Native
Common
PHARB

Calluna vulgaris  (L.) Hull
Heather, Scotch Heather
Introduced
Occasional
PHARB

Chamaedaphne calyculata  (L.) Moench
[Chamaedaphne calyculata  var.  angustifolia  (Aiton) Rehder]
Leatherleaf, Cassandra
Native
Rare
PHARB

Chimaphila maculata  (L.) Pursh
Striped Pipsissewa, Spotted Wiintergreen
Native
Rare
PHARB

Chimaphila umbellata  ssp.  cisatlantica  (Blake) Hultén
Prince's Pine, Pipsissewa
County Record (GP #18-53)
Native
Rare
PHARB

Corema conradii  (Torrey) Torrey ex Loudon
Broom Crowberry
Native, Watch List
Rare
PHARB

Epigaea repens  L.
[Epigaea repens  var.  glabrifolia  Fern.]
Mayflower, Trailing Arbutus
Native
Common
PHARB

Erica tetralix  L.
Crossleaf Heath
Introduced
Historic
CNH

Eubotrys racemosa  (L.) Nutt.
[Leucothoe racemosa  (L.) A. Gray]
Fetterbush, Swamp Sweetbells
Native
Historic
CNH

Gaultheria procumbens  L.
Wintergreen, Checkerberry, Teaberry
Introduced
Common
PHARB

Gaylussacia baccata  (Wangenh.) K. Koch
Black Huckleberry
Native
Abundant
PHARB

Gaylussacia bigeloviana  (Fern.) Sorrie & Weakley
[Gaylussacia dumosa  var.  bigeloviana  Fern.]
Dwarf or Bog Huckleberry
County Record (GP #19-143)
Native
Rare

Gaylussacia frondosa  (L.) Torrey & A. Gray ex Torrey
Dangleberry, Blue Tangle
Native
Common
PHARB

Hypopitys lanuginosa
[Monotropa lanuginosa  Michx.]
Hairy Pine-sap
County Record (GP #17-145)
Native, Watch List
Occasional
PHARB

Hypopitys monotropa  Crantz
[Monotropa hypopithys  L.]
Pinesap, False Beech Drops
Native
PHARB

Kalmia angustifolia  var.  angustifolia  L.
Sheep Laurel, Lambkill, Wicky
Native
Abundant
PHARB

Kalmia latifolia  L.
Mountain Laurel
Previously historic, but re-established in 2012
Native
Rare
PHARB

Leucothoe fontanesiana  (Steud.) Sleumer
Fetterbush
County Record (GP #19-27)
Introduced
Rare
PHARB

Lyonia ligustrina  var.  ligustrina  (L.) DC.
Maleberry, Male Blueberry
Native
Common
PHARB

Monotropa uniflora  L.
Indian Pipe
Native
Common
PHARB

Pieris japonica  (Thunb.) D.Don ex G.Don
Japanese Pieris
Introduced
Rare
PHARB

Pyrola americana  Sweet
[Pyrola rotundifolia  var.  americana  (Sweet) Fern.]
Pyrola, Round-leaved Shinleaf
Native
Common
PHARB

Pyrola elliptica  Nutt.
Pyrola, Elliptic Shinleaf
Native
Rare
PHARB

Rhododendron viscosum  (L.) Torrey
Swamp Azalea or Honeysuckle
Native
Common
PHARB

Vaccinium angustifolium  Aiton
[Vaccinium angustifolium  var.  hypolasium  Fern.]
Lowbush Blueberry
Native
Common
PHARB

Vaccinium caesariense  Mackenzie
New Jersey Highbush Blueberry
Native
unknown
PHARB

Vaccinium corymbosum  L.
[Vaccinium corymbosum  var.  glabrum  A. Gray]
Highbush Blueberry
Native
Common
PHARB

Vaccinium fuscatum  Aiton
[Vaccinium atrococcum  (A. Gray) Heller]
Black Highbush Blueberry
Native
Common
PHARB

Vaccinium macrocarpon  Aiton
Large or American Cranberry
Native
Common
PHARB

Vaccinium pallidum  Aiton
[Vaccinium vacillans  Kalm ex Torrey]
Early Lowbush Blueberry
Native
Common
PHARB


Rubiaceae


Cephalanthus occidentalis  L.
Buttonbush
Native
Occasional
PHARB

Galium album
White Bedstraw
County Record (GP #17-39)
Introduced
Rare
PHARB

Galium aparine  L.
Cleavers, Spring Cleavers
Native
Common
CNH

Galium asprellum  Michaux
Rough Bedstraw
Native
Unknown

Galium circaezans  var.  hypomalacum  Fern.
Wild Licorice, Forest Bedstraw
Native
Rare
PHARB

Galium mollugo  L.
[Galium erectum  Hudson]
Field Madder, White Bedstraw
Introduced
Common
PHARB

Galium obtusum  ssp.  obtusum  Bigelow
Blunt-leaved or Large Marsh Bedstraw
Native
Rare
PHARB

Galium pilosum  Aiton
Hairy Bedstraw
Native
Rare
PHARB

Galium tinctorium  var.  tinctorium  (L.) Scop.
Stiff Marsh Bedstraw
Native
Uncommon
PHARB

Galium trifidum  ssp.  trifidum  L.
Tricleft or Three-lobed Bedstraw
Native
Common
PHARB

Galium triflorum  Michaux
[Galium triflorum  var.  asprelliforme  Fern.]
Sweet-scented or Woodland Bedstraw
Native
Rare
PHARB

Galium verum  ssp.  verum  L.
Yellow or Our Lady's Bedstraw
Introduced
Historic
CNH

Galium verum  ssp.  wirtgenii  (F.W. Schultz) Oborny
Wirtgen's Bedstraw
Introduced
Historic
CNH

Houstonia caerulea  L.
[Hedyotis caerulea  (L.) Hooker]
Bluets, Quaker Ladies
Native
Common
PHARB

Houstonia purpurea  L.
Large Bluet
County Record (GP #19-57)
Native
Rare
PHARB

Mitchella repens  L.
Partridgeberry, Twinberry
Native
Uncommon
PHARB


Gentianaceae


Bartonia paniculata  (Michaux) Muhl.
Twining Screwstem
Native, Watch List
Common
PHARB

Bartonia virginica  (L.) B.S.P.
Virginia Screwstem
Native
Occasional
PHARB

Centaurium erythraea  Raf.
European Centaury
County Record (GP #20-88)
Introduced
Rare

Sabatia campanulata  (L.) Torrey
Slender Pink Marsh
Native, Endangered
Historic

Sabatia stellaris  Pursh
Sea Pink, Marsh Pink
Native, Endangered
Historic
CNH


Apocynaceae


Apocynum ×floribundum  Greene
[Apocynum androsaemifolium  ×]
Intermediate Dogbane
Native
Historic

Apocynum androsaemifolium  L.
Spreading or Pink Dogbane
Native
Occasional
PHARB

Apocynum cannabinum  L.
[Apocynum cannabinum  var.  hypericifolium  A. Gray]
Indian Hemp
Native
Rare
PHARB

Asclepias amplexicaulis  J.E. Smith
Wavy-leaved Milkweed
Native, Watch List
Occasional
PHARB

Asclepias exaltata  L.
Poke Milkweed
Native
Occasional
PHARB

Asclepias incarnata  ssp.  pulchra  (Ehrh. ex Willd.) Woodson
Downy Swamp Milkweed
Native
Common
PHARB

Asclepias purpurascens  L.
Purple Milkweed
Native, Endangered
Historic
CNH

Asclepias syriaca  L.
Common Milkweed
Native
Common
PHARB

Asclepias tuberosa  L.
Butterfly Weed
Native, Watch List
Common
PHARB

Asclepias verticillata  L.
Whorled Milkweed
Native, Threatened
Unknown

Cynanchum louiseae  Kartesz & Gandhi
[Vincetoxicum nigrum  (L.) Moench]
Black Swallow-wort
Introduced, Invasive
Uncommon

Vinca major
Greater Periwinkle
County record (GP #17-07)
Native
Rare
PHARB

Vinca minor  L.
Periwinkle, Myrtle
Introduced
Common
PHARB


Convolvulaceae


Calystegia sepium  ssp.  americana  (Sims) Brummitt
[Convolvulus sepium  var.  americanus  Sims]
Wild Morning-glory
Native
Common
PHARB

Convolvulus arvensis  L.
Field Bindweed
Only known county occurrence is from the Elizabeth Islands
Introduced
Historic
CNH

Cuscuta cephalanthi  Engelm.
Buttonbush Dodder
Native
Historic

Cuscuta compacta  var.  compacta  Juss. ex Choisy
Dense or Compact Dodder, Love Vine
Previously historic, re-established in 2018 (MDC #3859)
Native
Rare
PHARB

Cuscuta gronovii  var.  gronovii  Willd. ex J.A. Schultes
Love Vine, Strangleweed, Swamp Dodder
Native
Occasional
PHARB

Cuscuta polygonorum  Engelm.
Smartweed Dodder
Native, Watch List
Historic
CNH

Ipomoea pandurata  (L.) G.F.W. Meyer
Wild Potato Vine
Introduced
Unknown

Ipomoea purpurea  (L.) Roth
Common Morning Glory
County Record (GP #21-172)
Introduced
PHARB


Solanaceae


Datura stramonium  L.
[Datura stramonium  var.  tatula  (L.) Torrey.]
Jimsonweed, White Thorn-apple
Introduced
Occasional
PHARB

Nicandra physalodes  (L.) Gaertner
Apple-of-Peru
Introduced
Historic

Nicotiana longiflora  Cav.
Long-flowered Tobacco
Introduced
Historic
CNH

Physalis alkekengi  L.
Chinese Lantern
Introduced
Historic

Physalis angulata  L.
Cutleaf Ground Cherry
Introduced
Historic

Physalis grisea  (Waterfall) M. Martinez
[Physalis pruinosa  auct. non L.]
Ground Cherry, Strawberry Tomato
Native
Historic
CNH

Physalis philadelphica  var.  immaculata  Waterfall
Tomatillo, Mexican Ground Cherry
Introduced
Historic

Solanum carolinense  var.  carolinense  L.
Horse Nettle
County Record (EL 2012)
Introduced
Occasional
PHARB

Solanum dulcamara  var.  dulcamara  L.
Bittersweet Nightshade, Bittersweet
Introduced
Occasional
PHARB

Solanum nigrum  ssp.  nigrum  L.
European Black Nightshade
Introduced
Rare
CNH

Solanum ptychanthum  Dunal
[Solanum americanum  auct. non P. Miller]
American Black Nightshade
Native
Uncommon
PHARB

Solanum rostratum  Dunal
[Solanum cornutum  auct. non Lam.]
Buffalo-bur, Sandbur
Introduced
Historic
CNH

Solanum triflorum  Nutt.
Cut-leaved Nightshade
Only known county occurrence is from the Elizabeth Islands
Introduced
Historic
CNH


Boraginaceae


Cynoglossum amabile  Stapf & Drummond
Chinese Forget-Me-Not
Introduced
Historic
CNH

Echium vulgare  L.
Viper's Bugloss
Introduced
Occasional
PHARB

Myosotis arvensis  (L.) Hill
Field Scorpion Grass
Introduced
Rare
PHARB

Myosotis discolor  Pers.
Yellow-and-blue Forget-me-not
County Record (GP #20-51)
Introduced
Rare
PHARB

Myosotis scorpioides  L.
True Forget-me-not
Introduced
Waif
PHARB

Myosotis stricta  Link ex Roem. & Schult.
Blue Forget-me-not
County Record (GP #20-27)
Introduced
Rare
PHARB

Myosotis sylvatica  Ehrh. ex Hoffm.
Garden Forget-me-not
Introduced
Waif
PHARB

Myosotis verna  Nutt.
Spring Scorpion Grass
Native
Historic
CNH

Onosmodium virginianum  (L.) A. DC.
False Gromwell
Native
Historic
CNH

Symphytum officinale  L.
Comfrey
County Record (GP #16-96)
Introduced
Rare
PHARB


Oleaceae


Forsythia suspensa  (Thunb.) Vahl
Weeping Forsythia
County Record (GP #21-03)
Introduced
PHARB

Fraxinus americana  L.
White Ash
Introduced
Historic
CNH

Ligustrum obtusifolium  Sieb. & Zucc.
Japanese Privet
Introduced
Historic
CNH

Ligustrum ovalifolium  Hassk.
California Privet
Introduced
Occasional
PHARB

Ligustrum vulgare  L.
Common or Hedge Privet
Introduced
Historic
CNH

Syringa vulgaris  L.
Lilac
Introduced
Unknown


Plantaginaceae


Callitriche heterophylla  var.  heterophylla  Pursh
[Callitriche anceps  Fern.]
Variable Water-starwort
Native
Occasional
PHARB

Chelone glabra  L.
[Chelone glabra  var.  dilatata  Fern. & Wiegand.]
White Turtlehead
Native
Rare
PHARB

Chelone lyonii  Pursh
Lyon's or Pink Turtlehead
Introduced
Historic
CNH

Digitalis purpurea  var.  purpurea  L.
Common or Purple Foxglove, Digitalis
Introduced
Historic
CNH

Gratiola aurea  Pursh
Golden Pert, Golden or Yellow Hedge-hyssop
Native
Common
PHARB

Linaria dalmatica  ssp.  dalmatica  (L.) P. Miller
Dalmatian Toadfllax
Introduced
Rare
PHARB

Linaria vulgaris  P. Miller
Butter-and-Eggs, Common Toadflax
Introduced
Common
PHARB

Nuttallanthus canadensis  (L.) D.A. Sutton
[Linaria canadensis  (L.) Chaz.]
Blue Toadflax
Native
Common
PHARB

Plantago aristata  Michaux
Bracted or Rat-tail Plantain
Introduced
Occasional
PHARB

Plantago intermedia  DC.
[Plantago major  var.  intermedia  (DC.) Pilger]
Saltmarsh or Saltpond Plantain
Of uncertain taxonomic status
Native
Historic
CNH

Plantago lanceolata  L.
[Plantago altissima]
Narrow-leaved or English Plantain
Introduced
Abundant
PHARB

Plantago major  L.
Common or Dooryard Plantain
Introduced
Common
PHARB

Plantago maritima  var.  juncoides  (Lam.) A. Gray
[Plantago oliganthos  R. & S.]
Seaside Plantain
Native
Occasional
PHARB

Plantago rugelii  Dcne.
American, Rugel's or Pale Plantain
Native
Uncommon
PHARB

Plantago virginica  L.
Hoary, White, or Pale-seeded Plantain
Introduced
Historic
CNH

Veronica arvensis  L.
Corn Speedwell
Introduced
Occasional
PHARB

Veronica chamaedrys  L.
Germander Speedwell
County Record (GP #20-42)
Introduced
Rare
PHARB

Veronica officinalis  L.
Common Speedwell, Gypsyweed
Introduced
Occasional
PHARB

Veronica peregrina  ssp.  peregrina  L.
Purslane Speedwell, Neckweed
Only known county occurrence is from the Elizabeth Islands
Native
Historic

Veronica serpyllifolia  ssp.  serpyllifolia  L.
Thyme-leaved Speedwell
Previously historic, re-established in 2016 (GP #16-37)
Introduced
Occasional
PHARB


Scrophulariaceae


Limosella australis  R. Br.
[Limosella subulata  Ives]
Atlantic Mudwort, Saltpond Stars
Native, Watch List
Occasional
PHARB

Scrophularia lanceolata  Pursh
American or Hare Figwort
Native
Historic
PHARB

Scrophularia nodosa  L.
Common Figwort
County Record (GP #18-151)
Native
Rare
PHARB

Verbascum blattaria  L.
Moth Mullein
County Record (GP #20-165)
Introduced
Rare
PHARB

Verbascum thapsus  L.
Mullein, Flannel-plant
Introduced
Common
PHARB


Linderniaceae


Lindernia dubia  var.  anagallidea  (Michaux) Cooperrider
[Lindernia anagallidea  (Michaux) Pennell]
False Pimpernel
Native
Occasional
PHARB


Bignoniaceae


Campsis radicans  (L.) Seem. ex Bureau
Trumpet Creeper
County Record (GP #16-133)
Introduced
Occasional
PHARB

Catalpa bignonioides  Walter
Catalpa, Indian Bean Tree
Introduced
Uncommon
PHARB


Lentibulariaceae


Utricularia cornuta  Michaux
Horned or Naked Bladderwort
Native
unknown

Utricularia geminiscapa  Benj.
Twin-scaped, Mixed or Hidden-fruited Bladderwort
Native
Rare
PHARB

Utricularia gibba  L.
[Utricularia biflora  Lam.]
Humped, Swollen-spurred, or Creeping Bladderwort
Native
Historic
CNH

Utricularia subulata  L.
Slender or Zigzag Bladderwort
Native, Special Concern
Historic
CNH

Utricularia vulgaris  ssp.  macrorhiza  (Le Conte) Clausen
[Utricularia macrorhiza  Le Conte]
Great, Milfoil or Common Bladderwort
Native
unknown


Verbenaceae


Verbena bonariensis  L.
South American Vervain
Introduced
Rare
PHARB

Verbena hastata  var.  hastata  L.
Blue or Common Vervain
Native
Occasional
PHARB

Verbena urticifolia  L.
White Vervain
Native
Uncommon
PHARB


Lamiaceae


Ajuga reptans  L.
Carpet Bugelweed
Introduced
Occasional
PHARB

Galeopsis bifida  Boenn.
Split-lipped Hemp-nettle
County Record (GP #19-75)
Introduced
Occasional
PHARB

Glechoma hederacea  L.
[Glechoma hederacea  var.  micrantha  Moricand]
Ground Ivy, Gill-Over-the-Ground
Introduced
Common
PHARB

Hedeoma pulegioides  (L.) Pers.
American Pennyroyal
Native
Historic
CNH

Lamium amplexicaule  L.
Common Henbit
County Record (GP #16-17)
Introduced
Common
PHARB

Lamium galeobdolon  (L.) L.
Yellow Henbit
County Record (GP #20-26)
Introduced
Rare
PHARB

Lamium purpureum  L.
Red Henbit
County Record (GP #16-08)
Introduced
Common
PHARB

Leonurus cardiaca  L.
Motherwort
Introduced
Occasional
PHARB

Leonurus marrubiastrum  L.
Horehound-motherwort
Introduced
Historic

Lycopus americanus  Muhl. ex W. Barton
American Water Horehound
Native
Common
PHARB

Lycopus amplectens  Raf.
Sessile or Pondshore Horehound
Previously historic, re-established in 2020 (GP #20-225)
Native, Watch List
Rare
PHARB

Lycopus rubellus  Moench
Stalked Water Horehound
Native, Endangered
Unknown

Lycopus sherardii  Steele
Water Horehound
Native
Uncommon
PHARB

Lycopus uniflorus  Michaux
Northern or Tuberous Horehound
Native
Common
PHARB

Lycopus virginicus  L.
Virginia Horehound
Native
Common
PHARB

Marrubium vulgare  L.
Horehound
Introduced
Historic
PHARB

Melissa officinalis  L.
Lemon Balm
County Record (GP #20-207)
Introduced
Rare
PHARB

Mentha ×gracilis  Sole
[Mentha gentilis  auct. non L.]
Spotted or Downy Whorled Mint
Introduced
Rare

Mentha ×piperita  L.
[Mentha aquatica  ×  M. spicata]
Peppermint
Introduced
Historic

Mentha ×rotundifolia  (L.) Huds.
Round-leaved Mint
Introduced
Unknown

Mentha ×villosa  Hudson
[Mentha spicata  ×  M. suaveolens]
Wooly Mint
Introduced
Rare
PHARB

Mentha aquatica  var.  aquatica  L.
Water Mint
Introduced
Historic

Mentha arvensis  ssp.  parietariaefolia  (Becker) Briq.
Field Mint
Introduced
Historic
CNH

Mentha spicata  ssp.  spicata  L.
[Mentha longifolia  sensu auct.]
Spearmint
Introduced
Occasional
PHARB

Nepeta cataria  L.
Catnip
Introduced
Historic
CNH

Origanum vulgare  L.
Wild Marjoram
Introduced
Rare
PHARB

Physostegia virginiana  ssp.  virginiana  (L.) Bentham
[Physostegia virginiana  var.  speciosa  (Sweet) A.]
False Dragonhead, Obedience
Introduced
Unknown

Prunella laciniata  (L.) L.
Cut-leaved Heal-all
Introduced
Historic
CNH

Prunella vulgaris  ssp.  lanceolata  (W. Barton) Hultén
[Prunella vulgaris  var.  elongata  Bentham]
American Heal-all, Self-heal
Native
Common
PHARB

Prunella vulgaris  ssp.  vulgaris  L.
Eurasian Heal-all, Self-heal
Introduced
Uncommon
PHARB

Pycnanthemum incanum  var.  incanum  (L.) Michaux
Hoary Mountain Mint
Native
Historic
CNH

Pycnanthemum muticum  (Michaux) Pers.
Short-toothed Mountain Mint
Native
Occasional
PHARB

Pycnanthemum tenuifolium  Schrader
Slender-leaved Mountain Mint
Native
Uncommon
PHARB

Pycnanthemum verticillatum  (Michx.) Pers.
Whorled Mountain Mint
County Record (ET #19-62)
Native
Rare
PHARB

Salvia pratensis  L.
Meadow Clary or Meadow Sage
Introduced
Historic
CNH

Scutellaria galericulata  L.
[Scutellaria epilobiifolia  Hamilton]
Marsh or Common Skullcap
Native
Uncommon
PHARB

Scutellaria lateriflora  L.
Mad Dog Skullcap
Native
Uncommon
PHARB

Scutellaria parvula  var.  missouriensis  (Epling) Fern.
Small or Leonard's Skullcap
Introduced
Unknown

Teucrium canadense  var.  canadense  L.
[Teucrium canadense  var.  virginicum  (L.) Eaton]
Saltmarsh or American Germander, Wood Sage
Native
Common
PHARB

Thymus pulegioides  L.
[Thymus serpyllum  ssp.  chamaedrys  (Fries) Voll.]
Lemon Thyme
Country Record (GP 2014)
Introduced
Rare
PHARB

Trichostema dichotomum  L.
Blue Curls
Native
Occasional
PHARB


Phrymaceae


Mimulus ringens  L.
Blue, Allegheny or Longstalk Monkey-flower
Native
Historic
CNH

Phryma leptostachya  L.
Lopseed
Native
Rare
PHARB


Orobanchaceae


Agalinis acuta  Pennell
[Gerardia acuta  (Pennell) Pennell]
Sandplain Gerardia, Agalinis
Native, Endangered
Rare
PHARB

Agalinis maritima  ssp.  maritima  (Raf.) Raf.
[Gerardia maritima  Raf.]
Seaside Gerardia, Saltmarsh Agalinis
Native
Uncommon
PHARB

Agalinis paupercula  (Gray) Britt.
[Agalinis purpurea  var.  parviflora  (Benth.) Boivin]
Small-flowered Gerardia
Native
Rare
PHARB

Agalinis purpurea  (L.) Pennell
[Gerardia purpurea  var.  parviflora  Bentham]
Purple Gerardia, Smooth Agalinis
Native
Occasional
PHARB

Aureolaria flava  var.  flava  (L.) Farw.
Smooth False Foxglove
Native
Unknown

Aureolaria pedicularia  var.  intercedens  (Pennell) Pennel
Fernleaf Yellow False Foxglove
Native
Rare
PHARB

Aureolaria virginica  (L.) Pennell
[Gerardia virginica  (L.) B.S.P.]
Downy False Foxglove
Native
Rare
PHARB

Epifagus virginiana  (L.) W. Bart.
Beechdrops
Native
Occasional
PHARB

Melampyrum lineare  Desr.
[Melampyrum lineare  var.  latifolium  Barton]
Common Cow Wheat
Native
Common
PHARB

Orobanche uniflora  L.
One-flowered Cancer
Native
Uncommon
PHARB

Pedicularis canadensis  L.
Wood Betony, Forest Lousewort
Native
Historic
CNH

Schwalbea americana  L.
Chaffseed
Native, Endangered
Historic
CNH


Aquifoliaceae


Ilex crenata
Japanese Holly
County Record (GP #17-41)
Introduced
Occasional
PHARB

Ilex glabra  (L.) A. Gray
Inkberry
Native
Occasional
PHARB

Ilex opaca  var.  opaca  Aiton
Holly or American Holly
Native
Common
PHARB

Ilex verticillata  (L.) A. Gray
[Ilex verticillata  var.  tenuifolia  (Torrey) Wats.]
Winterberry, Black Alder
Native
Common
PHARB


Campanulaceae


Campanula alliariifolia  Willd.
Cornish Bellflower
County Record (GP #16-138)
Introduced
Waif
PHARB

Campanula aparinoides  Pursh
[Campanula uliginosa  Rydb.]
Marsh Bellflower
Native
Historic
CNH

Campanula rapunculoides  L.
Creeping Bellflower
County record (GP #17-62)
Introduced
Uncommon
PHARB

Jasione montana  L.
Sheepbit
County Record (EL 2014)
Introduced
Occasional
PHARB

Lobelia cardinalis  L.
Cardinal Flower
Native
Occasional
PHARB

Lobelia dortmanna  L.
Water Lobelia
Native
Historic
CNH

Lobelia siphilitica  L.
Blue Lobelia
County Record (GP #20-215)
Introduced
Rare
PHARB

Lobelia spicata  var.  spicata  Lam.
Spiked Lobelia
Native
Historic
CNH

Triodanis perfoliata  (L.) Nieuwl.
[Specularia perfoliata  (L.) A. DC.]
Venus's Looking-glass
Native
Occasional
PHARB


Menyanthaceae


Menyanthes trifoliata  L.
[Menyanthes trifoliata  var.  minor  Raf.]
Buckbean, Bogbean
Only known county occurrence is from the Elizabeth Islands
Native
Historic
CNH

Nymphoides cordata  (Ell.) Fern.
Floating Heart
Previously historic, re-established in 2009 (MDC,TB)
Native
Rare
PHARB


Asteraceae


Achillea millefolium  ssp.  lanulosa  (Nutt.) Piper
[Achillea millefolium  var.  occidentalis  DC.]
Seaside Yarrow
Native, Watch List
Abundant
PHARB

Achillea millefolium  ssp.  millefolium  L.
Yarrow
Introduced
Unknown
PHARB

Ageratina altissima  (L.) King & H.E. Robins.
[Eupatorium rugosum  Houtt.]
White Snakeroot
Introduced
Unknown

Ageratina aromatica  (L.) Spach
[Eupatorium aromaticum  L.]
Lesser Snakeroot, Aromatic Boneset
Native, Endangered
Unknown

Ambrosia artemisiifolia  L.
[Ambrosia artemisiifolia  var.  elatior  (L.) Descourtils]
Ragweed
Native
Abundant
PHARB

Ambrosia psilostachya  DC.
[Ambrosia coronopifolia  Torrey & A. Gray]
Western Ragweed
Introduced
Historic
CNH

Anaphalis margaritacea  (L.) Bentham & Hooker f.
[Gnaphalium margaritaceum  L.]
Pearly Everlasting
Native
Common
PHARB

Antennaria howellii  ssp.  neodioica  (Greene) Bayer
[Antennaria neodioica  var.  chlorophylla  Fern.]
Greene's Pussytoes
Native
Historic
CNH

Antennaria neglecta  Greene
Pussytoes
Native
Rare
PHARB

Antennaria parlinii  ssp.  fallax  (Greene) Bayer & Stebbins
Parlin's Pussytoes
County Record (GP #20-70)
Native
Rare
PHARB

Antennaria plantaginifolia  (L.) Richardson
Plantain-leaved Pussytoes
Native
Occasional
PHARB

Anthemis arvensis  L.
Corn Chamomile
County Record (GP#16-90)
Introduced
Rare
PHARB

Anthemis cotula  L.
Stinking Chamomile
Introduced
Historic
CNH

Arctium minus  Bernh.
Burdock
Introduced
Occasional
PHARB

Artemisia campestris  ssp.  caudata  (Michaux) Hall & Clements
Seaside Wormwood
Native
Occasional
PHARB

Artemisia pontica  L.
Roman Wormwood
Introduced
Historic

Artemisia stelleriana  Besser
Dusty Miller, Beach Wormwood
Introduced
Common
PHARB

Artemisia vulgaris  L.
Common Mugwort
County Record (GP 2010)
Introduced
Occasional
PHARB

Baccharis halimifolia  L.
Groundsel Tree, Sea Myrtle
Native
Common
PHARB

Balsamita major  Desf.
Costmary
Introduced
Unknown

Bellis perennis  L.
Lawn-daisy
Introduced
Occasional

Bidens connata  Muhl. ex Willd.
Sticktights
Native
Common
PHARB

Bidens discoidea  (Torrey & A. Gray) Britton
Buttonbush Beggar-ticks
Native
Historic
CNH

Bidens frondosa  L.
Beggar-ticks, Sticktights
Native
Common
PHARB

Bidens tripartita  L.
Three-lobed Beggar-ticks
Observed by MacKeever (notes) 1959, Squibnocket
Native
Historic

Boltonia asteroides  (L.) L'Hér.
White Doll's-daisy
County Record (GP #19-255)
Introduced
Rare
PHARB

Centaurea ×moncktonii  C. E. Britton
Protean Knapweed
County Record (GP #19-266)
Introduced
Rare
PHARB

Centaurea nigra  L.
[Centaurea nigra  var.  radiata  DC.]
Black Knapweed
Introduced
Historic
CNH

Centaurea nigrescens  Willd.
[Centaurea vochinensis  Bernh. ex Reichenb.]
Knapweed
Introduced
Historic
CNH

Centaurea stoebe  ssp.  micranthos  (Gugler) Hayek
[Centaurea biebersteinii  DC.]
Bushy Knapweed
Introduced
Abundant
PHARB

Cichorium intybus  L.
Chicory
Introduced
Common
PHARB

Cirsium arvense  (L.) Scop.
[Cirsium arvense  var.  integrifolium  Wimmer & Grab]
Canada Thistle
Introduced
Rare
PHARB

Cirsium discolor  (Muhl. ex Willd.) Sprengel
Field Thistle
Native
Uncommon
PHARB

Cirsium horridulum  var.  horridulum  Michaux
Yellow Thistle
Native, Watch List
Common
PHARB

Cirsium muticum  Michaux
Swamp Thistle
Native
Rare
PHARB

Cirsium pumilum  var.  pumilum  (Nutt.) Sprengel
Pasture Thistle
Native
Uncommon
PHARB

Cirsium vulgare  (Savi) Tenore
Common Thistle
Introduced
Common
PHARB

Coreopsis lanceolata  L.
Coreopsis
Introduced
Historic
PHARB

Coreopsis rosea  Nutt.
Pink Tickseed, Pink Coreopsis
Native, Watch List
Uncommon
PHARB

Coreopsis tinctoria  Nutt.
Plains or Gardens Tickseed
Introduced
Historic
CNH

Cosmos sulphureus  Cav.
Sulphur Cosmos
Introduced
Rare
PHARB

Crepis capillaris  (L.) Wallr.
Smooth Hawk's Beard
Introduced
Historic
CNH

Doellingeria umbellata  (P. Mill.) Nees
[Aster umbellatus  P. Mill.]
Tall Flat-topped White Aster
Native
Occasional
PHARB

Echinacea pallida  (Nutt.) Nutt.
Prairie Coneflower
Introduced
Rare
CNH

Erechtites hieraciifolius  var.  hieraciifolius  (L.) Raf. ex DC.
Pilewort
Native
Common
PHARB

Erechtites hieraciifolius  var.  megalocarpus  (Fern.) Cronq.
[Erechtites megalocarpus  Fern.]
Seaside Pilewort
Native, Watch List
Historic

Erigeron annuus  (L.) Pers.
Daisy Fleabane
Native
Common
PHARB

Erigeron canadensis  L.
[Conyza canadensis  (L.) Cronq.]
Horseweed
Native
Abundant
PHARB

Erigeron philadelphicus  L.
Philadelphia Fleabane
County Record (GP #19-24)
Native
Rare
PHARB

Erigeron pulchellus  Michaux
Robin's Plantain
Native
Rare
PHARB

Erigeron strigosus  var.  strigosus  Muhl. ex Willd.
[Erigeron strigosus  var.  beyrichii  (Fischer C. Meyer) Torrey]
Rough Fleabane
Native
Common
PHARB

Eupatorium cannabinum  L.
Hemp-agrimony
County Record (GP #19-108)
Introduced
Rare
PHARB

Eupatorium hyssopifolium  L.
[Eupatorium hyssopifolium  var.  calcaratum  Fern. & Schub.]
Hyssop-leaved Boneset
Native
Common
PHARB

Eupatorium perfoliatum  L.
Boneset
Native
Common
PHARB

Eupatorium pilosum  Walter
[Eupatorium rotundifolium  var.  saundersii  (Porter) Cronq.]
Rough or Verbena Boneset
Native
Occasional
PHARB

Eupatorium serotinum  Michx.
Late Thoroughwort
County Record (GP #19-206)
Introduced
Rare
PHARB

Eurybia divaricatus  (L.) Nesom
[Aster divaricatus  (Nutt.) Torrey & A. Gray]
White Wood Aster
Native
Abundant
PHARB

Eurybia radula  (Ait.) Nesom
[Aster radula  Ait.]
Rough Aster
Native, Watch List
Historic

Eurybia spectabilis  (Ait.) Nesom
[Aster spectabilis  Aiton]
Showy Aster
Native
Occasional
PHARB

Euthamia caroliniana  (L.) Greene ex Porter & Britt.
[Euthamia tenuifolia  (Pursh) Nutt.]
Coastal Plain Flat-top Goldenrod
Native
Common
PHARB

Euthamia graminifolia  (L.) Nutt.
[Solidago graminifolia  (L.) Salisb.]
Grass-leaf or Flat-top Goldenrod
Native
Abundant
PHARB

Eutrochium dubium  (Willd. ex Poir.) E.E. Lamont
[Eupatorium dubium  Willd. ex Poiret]
Atlantic Joe Pye Weed
Native
Common
PHARB

Eutrochium fistulosum  (Barratt) E.E. Lamont
[Eupatorium fistulosum  Barratt]
Trumpetweed
Native
Rare
PHARB

Eutrochium maculatum  var.  maculatum  (L.) E.E. Lamont
[Eupatorium maculatum  L.]
Mottled Joe Pye Weed
Native
Unknown

Galinsoga parviflora  Cav.
Quickweed
County Record (GP #16-95)
Introduced
Uncommon
PHARB

Galinsoga quadriradiata  Ruiz & Pavón
[Galinsoga bicolorata  St. John & White]
Hairy Quickweed
Introduced
Occasional
PHARB

Gamochaeta purpurea  (L.) Cabrera
Purple Cudweed
Native, Endangered
Historic
CNH

Gnaphalium uliginosum  L.
Low Cudweed
Native
Rare
PHARB

Helenium flexuosum  Raf.
[Helenium nudiflorum  Nutt.]
Purple-headed Sneezeweed
Introduced
Historic
CNH

Helianthus annuus  L.
Common Sunflower
Only known county occurrence is from the Elizabeth Islands
Introduced
Historic
CNH

Helianthus divaricatus  L.
Woodland Sunflower
Native
Historic
PHARB

Helianthus strumosus  L.
Rough-leaved Woodland Sunflower
Native
Historic
CNH

Hieracium ×marianum  Willd.
Maryland Hawkweed
Native
Historic

Hieracium aurantiacum  L.
Orange Hawkweed
Observed by B. Sorrie (notes) 1980, Gay Head Cemetery.
Introduced
Historic

Hieracium caespitosum  Dumort.
[Hieracium pratense  Tausch]
Meadow or Field Hawkweed
Introduced
Occasional
PHARB

Hieracium flagellare  Willd.
[Pilosella flagellaris  (Willd.) P.D. Sell & C. West]
Whip Hawkweed
Introduced
Rare
PHARB

Hieracium gronovii  L.
Hairy Hawkweed
Native
Occasional
PHARB

Hieracium lachenalii  K.C. Gmelin
European Hawkweed
Introduced
Unknown

Hieracium paniculatum  L.
Woodland Hawkweed
Only known county occurrence is from the Elizabeth Islands
Native
Historic
CNH

Hieracium pilosella  L.
Mouse-ear Hawkweed
Introduced
Common

Hieracium piloselloides  Vill.
[Hieracium florentinum  All.]
Smooth Hawkweed
Introduced
Historic
CNH

Hieracium sabaudum  Michx.
Savoy hawkweed
County Record (GP #17-117)
Introduced
Occasional
PHARB

Hieracium scabrum  Michaux
Rough Hawkweed
Native
Rare
PHARB

Hieracium umbellatum  L.
Narrow-leaved Hawkweed
Native
Historic
CNH

Hieracium venosum  L.
[Hieracium venosum  var.  nudicaule  (Michaux) Farw.]
Rattlesnake Weed, Poor Robin's Plantain
Native
Common
PHARB

Hypochaeris radicata  L.
Spotted Cat's Ear
Introduced
Abundant
PHARB

Inula helenium  L.
Elecampane
Introduced
Historic
CNH

Ionactis linariifolius  (L.) Greene
[Aster linariifolius  L.]
Stiff or Spruce Aster
Native
Common
PHARB

Iva frutescens  (Bartlett) R.C. Jackson
[Iva frutescens  ssp.  oraria  (Bartlett) Jackson]
Saltmash Elder, Hightide Bush
Native
Common
PHARB

Krigia virginica  (L.) Willd.
Dwarf Dandelion
Native
Occasional
PHARB

Kuhnia eupatorioides  L.
False Boneset
Introduced
Unknown

Lactuca biennis  (Moench) Fern.
Blue Wild Lettuce
Native
Common
PHARB

Lactuca canadensis  L.
[Lactuca canadensis  var.  latifolia  Kuntze]
Yellow Wild Lettuce
Native
Common
PHARB

Lactuca hirsuta  Muhl. ex Nutt.
[Lactuca hirsuta  var.  sanguinea  (Bigelow)]
Hairy Wild Lettuce
Native, Watch List
Historic
PHARB

Lactuca sativa  L.
Garden lettuce
Introduced
Historic, Waif

Lactuca serriola  L.
Prickly Lettuce
Introduced
Rare
PHARB

Lapsana communis  L.
Common Nipplewort
County Record (GP #17-89)
Introduced
Occasional
PHARB

Leontodon saxatilis  ssp.  saxatilis  Lam.
[Leontodon taraxacoides  (Vill.) Mérat]
von Leysser's Fall Dandelion
Previously historic, re-established in 2016 (GP #16-171)
Introduced
Rare
CNH

Leucanthemum vulgare  Lam.
[Chrysanthemum leucanthemum  L.]
Oxeye Daisy
Introduced
Common
PHARB

Liatris novae-angliae  var.  novae-angliae  (Lunell) Shinners
[Liatris borealis  Nutt.]
New England Blazing Star
Native, Special Concern
Rare
PHARB

Matricaria discoidea  DC.
[Matricaria matricarioides  auct. non Less. Porter]
Pineapple Weed
Introduced
Occasional
PHARB

Mikania scandens  (L.) Willd.
Climbing Hempweed
Native
Uncommon
PHARB

Nabalus serpentarius  (Pursh) Hook.
[Prenanthes serpentaria  Pursh]
Lion's Foot
Native, Endangered
Rare
CNH

Nabalus trifoliolatus  Cass.
[Prenanthes trifoliolata  (Cass.) Fern.]
Fall Rattlesnake Root
Native
Common
PHARB

Oclemena acuminata  (Michx.) Nesom
[Aster acuminatus  Michaux]
Sharp-leaved Aster
Native
Historic
CNH

Oclemena nemoralis  (Ait.) Greene
[Aster nemoralis  Aiton]
Bog Aster
Native
Historic
PHARB

Packera aurea  (L.) A. & D. Löve
[Senecio aureus  L.]
Golden Ragwort
Native
Rare
PHARB

Pityopsis falcata  (Pursh) Nutt.
[Chrysopsis falcata  (Pursh) Ell.]
Sickle-leaved Golden Aster
Native
Common
PHARB

Pluchea odorata  var.  succulenta  (Fern.) Cronq.
[Pluchea purpurascens  var.  succulenta  Fern.]
Saltmarsh Fleabane
Native
Common
PHARB

Pseudognaphalium obtusifolium  (L.) Hilliard & Burtt
[Gnaphalium obtusifolium  L.]
Sweet Everlasting
Native
Common
PHARB

Rudbeckia hirta  var.  pulcherrima  Farw.
[Rudbeckia serotina  Nutt.]
Black-eyed Susan
Introduced
Occasional
PHARB

Rudbeckia triloba  L.
Thin-leaved Cone Flower
Observed by MacKeever (notes) 1960, Edgartown
Introduced
Historic

Scorzoneroides autumnalis  ssp.  autumnalis  (L.) Moench
[Leontodon autumnalis  L.]
Fall Dandelion, Hawkbit
Introduced
Rare
PHARB

Senecio vulgaris  L.
Common Groundsel
County Record (GP,TB 2012)
Introduced
Uncommon
PHARB

Sericocarpus asteroides  (L.) B.S.P.
[Aster paternus  Cronq.]
Toothed White-topped Aster
Native
Common
PHARB

Sericocarpus linifolius  (L.) B.S.P.
[Aster solidagineus  Michaux]
Narrow-leaved White-topped Aster
Native
Occasional
PHARB

Solidago ×asperula  Desf.
[Solidago rugosa  ×  S. sempervirens]
Hybrid Goldenrod
Native
Historic

Solidago aestivalis  Bicknell
[Solidago rugosa  var.  sphagnophila  Graves]
Sphagnum Goldenrod
Native
Historic
CNH

Solidago altissima  ssp.  altissima  L.
[Solidago canadensis  var.  scabra  Torrey & A.]
Tall Goldenrod
Native
Occasional
PHARB

Solidago arguta  var.  arguta  Aiton
Toothed Goldenrod
Native
Historic

Solidago bicolor  L.
Silverrod
Native
Occasional
PHARB

Solidago caesia  L.
Axillary Goldenrod
Native
Occasional
PHARB

Solidago erecta  Pursh
Slender Goldenrod
Native
Historic

Solidago gigantea  Aiton
[Solidago gigantea  var.  serotina  (Kuntze) Cronq.]
Late Goldenrod
Native
Rare
PHARB

Solidago juncea  Aiton
Early Goldenrod
Native
Common
PHARB

Solidago latissimifolia  P. Miller .
[Solidago elliottii  var.  ascendens  Torrey & A. Gray]
Coastal Goldenrod
Native
Common
PHARB

Solidago nemoralis  ssp.  nemoralis  Aiton
Field Goldenrod
Native
Common
PHARB

Solidago odora  ssp.  odora  Aiton
Sweet Goldenrod
Native
Common
PHARB

Solidago puberula  var.  puberula  Nutt.
Downy Goldenrod
Native
Common
PHARB

Solidago rugosa  ssp.  aspera  (Aiton) Cronq.
[Solidago aspera  Aiton]
Rough-stemmed Goldenrod
Native
Common
PHARB

Solidago rugosa  ssp.  rugosa  P. Miller
Rough-stemmed Goldenrod
Native
Common
PHARB

Solidago sempervirens  var.  sempervirens  L.
Seaside Goldenrod
Native
Common
PHARB

Solidago uliginosa  Nutt.
[Solidago uliginosa  var.  linoides  (Tor. & Gray) Fern.]
Swamp Goldenrod
Native
Historic
CNH

Solidago ulmifolia  var.  ulmifolia  Muhl. ex Willd.
Elm-leaved Goldenrod
Native
Historic
CNH

Sonchus arvensis  var.  arvensis  L.
Field or Sow Thistle
Introduced
Historic
CNH

Sonchus asper  (L.) Hill
Spiny Sow Thistle
Introduced
Common
PHARB

Sonchus oleraceus  L.
Annual Sow Thistle
Introduced
Rare
PHARB

Symphyotrichum concolor  ssp.  concolor  (L.) Nesom
[Aster concolor  L.]
Eastern Silvery Aster
Native, Endangered
Historic
CNH

Symphyotrichum cordifolium  (L.) Nesom
[Aster cordifolius  L.]
Blue Heart-leaved Aster
Native
Rare
PHARB

Symphyotrichum dumosum  (L.) Nesom
[Aster dumosus  var.  coridifolius  (Michaux) Torrey & Gray]
Bushy, Long-stalked or Rice-button Aster
Native
Common
PHARB

Symphyotrichum ericoides  var.  ericoides  (L.) Nesom
[Aster ericoides  L.]
Heath White Aster
Native
Common
PHARB

Symphyotrichum lanceolatum  ssp.  lanceolatum  (Willd.) Nesom
[Aster lanceolatus  Willd.]
Panicled Aster
County Record (GP #18-166)
Native
Rare
PHARB

Symphyotrichum lanceolatum  var.  latifolium  (Semple & Chmielewski) G.L. Nesom
Panicled Aster
County Record (GP #21-167)
Native
Rare
PHARB

Symphyotrichum lateriflorum  (L.) A. & D. Löve
[Aster lateriflorus  (L.) Britton]
Calico or Goblet Aster
Native
Common
PHARB

Symphyotrichum novae-angliae  (L.) Nesom
[Aster novae-angliae  L.]
New England Aster
Native
Rare
PHARB

Symphyotrichum novi-belgii  var.  elodes  (Torr. & Gray) Nesom
[Aster elodes Torr.  & Gray]
New York American-aster
County Record (TB, MDC #2129)
Native
Uncommon
PHARB

Symphyotrichum novi-belgii  var.  novi-belgii  (L.) Nesom
[Aster novi-belgii  L.]
New York American-aster
Native
Common
PHARB

Symphyotrichum patens  var.  patens  (Ait.) Nesom
[Aster patens  var.  patens  Aiton]
Late Purple American-aster
Native
Occasional
PHARB

Symphyotrichum pilosum  var.  pilosum  (Willd.) Nesom
[Aster pilosus  Willd.]
Awl American-aster
County Record (TB, EH 2013)
Native
Occasional
PHARB

Symphyotrichum pilosum  var.  pringlei  (A. Gray) Nesom
[Aster pilosus  var.  pringlei  (A. Gray) Blake]
Pringle's Aster
Native
Uncommon
PHARB

Symphyotrichum puniceum  var.  puniceum  (L.) A. & D. Löve
[Aster puniceus  var.  puniceus  L.]
Purple-stemmed Aster
Native
Historic

Symphyotrichum racemosum  (Ell.) Nesom
[Aster fragilis  auct. non Willd.]
Small White Aster
Native
Uncommon
PHARB

Symphyotrichum subulatum  var.  subulatum  (Michaux) Nesom
[Aster subulatus  var.  subulatus  Michaux]
Small- flowered or Annual Saltmarsh Aster
Native
Occasional
PHARB

Symphyotrichum tenuifolium  var.  tenuifolium  (L.) Nesom
[Aster tenuifolius  L.]
Large-flowered or Saltmarsh Aster
Native
Common
PHARB

Symphyotrichum undulatum  (L.) Nesom
[Aster undulatus  L.]
Wavy-leaved or Clasping Heart-leaf Aster
Native
Common
PHARB

Tanacetum parthenium  (L.) Schultz-Bip.
[Chrysanthemum parthenium  (L.) Bernh.]
Feverfew
Observed by MacKeever (notes) 1958, Katama
Introduced
Historic

Tanacetum vulgare  L.
[Chrysanthemum uliginosum  Pers.]
Tansy
Introduced
Common
PHARB

Taraxacum laevigatum  (Willd.) DC.
[Taraxacum erythrospermum  Andrz. ex Besser]
Red-seeded Dandelion
Introduced
Common
PHARB

Taraxacum officinale  G.H. Weber ex Wiggers
Dandelion
Introduced
Common
PHARB

Tragapogon pratensis  L.
Yellow Goat's Beard
Introduced
Historic

Tragopogon dubius  Scop.
[Tragopogon major  Jacq.]
Thick-stemmed Goat's Beard
Introduced
Historic
CNH

Tussilago farfara  L.
Colt's-foot
County Record (GP 2014)
Introduced
Uncommon
PHARB

Xanthium strumarium  var.  canadense  (P. Miller) Torrey & A. Gray
[Xanthium echinatum  Murray]
Cocklebur
Native
Common
PHARB


Araliaceae


Aralia elata  (Miq.) Seem.
Japanese Angelica-tree
County Record (GP #17-86)
Introduced
Rare
PHARB

Aralia nudicaulis  L.
Wild Sarsaparilla
Native
Abundant
PHARB

Hedera helix  L.
English Ivy
Introduced
Occasional
PHARB


Apiaceae


Aegopodium podagraria  L.
Bishop's Goutweed
County Record (GP#17-26)
Introduced, Invasive
Rare
PHARB

Angelica lucida  L.
[Coelopleurum lucidum  (L.) Fern.]
Seaside Angelica
Native, Watch List
Unknown
PHARB

Carum carvi  L.
Caraway
County Record (GP #17-115)
Introduced
Rare
PHARB

Cicuta bulbifera  L.
Bulblet Water Hemlock
Native
Uncommon
PHARB

Cicuta maculata  var.  maculata  L.
Water Hemlock
Previously historic, re-established in 2016 (GP #16-124)
Native
Uncommon
PHARB

Conium maculatum  L.
Poison Hemlock
Introduced
Rare
PHARB

Coriandrum sativum  L.
Coriander
Previously historic, re-established in 2019 (GP #19-49)
Introduced
Rare
PHARB

Daucus carota  L.
Queen Anne's Lace
Introduced
Abundant
PHARB

Foeniculum vulgare  P. Miller
Fennel
Introduced
Historic

Heracleum mantegazzianum  Sommier & Levier
Giant Cow-parsnip
County Record (EL 2011)
Introduced
Rare
PHARB

Heracleum maximum  Bartram
[Heracleum lanatum  Michaux]
Cow-parsnip
Native
Common
PHARB

Hydrocotyle americana  L.
Swamp or Woodland Pennywort
Native
Uncommon
PHARB

Hydrocotyle umbellata  L.
Water or Pondshore Pennywort
Native
Common
PHARB

Hydrocotyle verticillata  Thunb.
[Hydrocotyle verticillata  var.  triradiata  (A. Richard) Fern.]
Saltpond Pennywort
Native, Threatened
Rare
PHARB

Kalopanax septemlobus  (Thunb.) Koidz.
[Kalopanax pictus  (Thunb.) Nakai]
Castor Aralia
County Record (GP #17-85)
Introduced
Rare
PHARB

Ligusticum scoticum  ssp.  scoticum  L.
[Ligusticum scothicum  L.]
Scotch or Sea Lovage
Native
Rare
PHARB

Myrrhis odorata  (L.) Scop.
Sweet Cicely
Introduced
Rare
PHARB

Pimpinella saxifraga  ssp.  saxifraga  L.
Burnet-saxifrage
Introduced
Rare
PHARB

Ptilimnium capillaceum  (Michaux) Raf.
Mock Bishop's Weed
Native
Occasional
PHARB

Sanicula canadensis  var.  canadensis  L.
Canadian Sanicle
Native, Threatened
Uncommon
PHARB

Sanicula marilandica  L.
Black Snakeroot
Native
Historic
CNH

Sium suave  Walter
Water Parsnip
Native
Occasional
PHARB

Torilis japonica  (Houtt.) DC.
Erect Hedge-parsley
County Record (GP #16-129)
Introduced
Rare
PHARB


Adoxaceae


Sambucus nigra  ssp.  canadensis  (L.) R. Bolli
[Sambucus canadensis  L.]
Black Elderberry
Native
Common
PHARB

Viburnum dentatum  var.  lucidum  Aiton
[Viburnum recognitum  Fern.]
Northern or Smooth Arrowwood
Native
Abundant
PHARB

Viburnum dentatum  var.  venosum  (Britton) Gleason
Southern Arrowwood
Native
Occasional
PHARB

Viburnum dilatatum  Thunb.
Linden Arrowwood
County Record (TB, KF 2011)
Introduced
Rare
PHARB

Viburnum nudum  var.  cassinoides  (L.) Torr. & Gray
[Viburnum cassinoides  L.]
Witherod, Wild Raisin
Native
Rare
PHARB


Caprifoliaceae


Knautia arvensis  (L.) Coulter
Blue Buttons or Caps
Introduced
Unknown

Lonicera × bella  Zabel
Bell's Honeysuckle
County Record (GP #20-38)
Introduced
Rare
PHARB

Lonicera × purpusi  Rehder
Winter Beauty Honeysuckle
State Record (GP #20-14)
Introduced
Rare
PHARB

Lonicera japonica  Thunb.
Japanese Honeysuckle
Introduced, Invasive
Common
PHARB

Lonicera morrowii  A. Gray
Morrow Honeysuckle
Introduced, Invasive
Common
PHARB

Symphoricarpos albus  ssp.  laevigatus  (Fern.) Hultén
Snowberry
Introduced
Historic, Waif

Symphoricarpos orbiculatus  Moench.
Coralberry
Introduced
Historic

Triosteum perfoliatum  L.
Perfoliate Horse Gentian
Native, Endangered
Rare
PHARB

Valerianella locusta  (L.) Lat.
European Corn-salad
State Record (GP #20-36)
Introduced
Rare
PHARB

Weigela floribunda  (Siebold & Zucc.) K.Koch
Crimson Weigela
County record (GP #19-36)
Introduced
Waif
PHARB