NHESP Plant Watch List

(as of March 6, 2012)

Plant Watch List
Scientific Name	MA Checklist Synonym	Common Name	S Rank	New England Rank	G Rank	Reason
Acalypha virginica		Three-seeded Mercury	S1S2		G5	Uncommon
Acer nigrum		Black Maple	S3		G5	MESA- Delisted
Achillea millefolium var. lanulosa	A. millefolium var. occidentalis; A. millefolium var. borealis; A. borealis	Seaside Yarrow	S3S4		G5T5	MESA- Delisted
Agrimonia rostellata		Small-beaked Agrimony	SNR		G5	Introduced?
Amelanchier nantucketensis	A. stolonifera	Nantucket Shadbush	S3	1	G3Q	MESA- Delisted
Angelica lucida	Coelopleurum lucidum	Seaside-angelica	S2?	IND	G5	Uncommon
Asclepias tuberosa		Orange Milk-weed	S4	3	G5?	MESA- Delisted
Athyrium asplenioides	A. filix-femina var. asplenioides	Southern Lady-fern	S2?		G5T5	Uncommon
Atriplex glabriuscula		Prostrate Orache	S1S2		G4	Uncommon
Betula cordifolia	B. papyrifera var. cordifolia	Heart-leaf Paper-birch	SNR		G5T5	Uncommon
Betula nigra		River Birch	S3	2	G5	Uncommon
Bidens beckii	Megalodonta beckii	Water Marigold	S2		G4G5	Uncommon
Boechera stricta	Arabis drummondii	Drummond's Rockcress	S2S3		G5	Uncommon
Bolboschoenus fluviatilis	Scirpus fluviatilis	River Bulrush	S2		G5	MESA- Delisted
Bolboschoenus novae-angliae	Scirpus cylindricus	Long-stalked Bullrush	S2?	2	G5	Uncommon
Botrychium angustisegmentum	B. lanceolatum ssp. angustisegmentum	Narrow Triangle Grape-fern	S2S3		G5TNR	Uncommon
Botrychium matricariifolium		Daisy-leaf Moonwort	S2?		G5	Uncommon
Botrychium oneidense		Blunt-lobed Grape-fern	S1S2	IND	G4	Uncommon
Botrychium simplex	B. simplex var. simplex	Least Moonwort	S1S2		G5	Uncommon
Botrychium tenebrosum	B. simplex var. tenebrosum	Swamp Moonwort	S1S2		G5T4?Q	Uncommon
Calamagrostis canadensis var. macouniana		Macoun's Reedgrass	SNR		G5T5?	Uncommon
Cardamine bulbosa	C. rhomboidea	Spring-Cress	S2S3		G5	Uncommon
Cardamine maxima	Dentaria maxima; Dentaria anomala	Three-leaved Toothwort	S2?	IND.	G5	Uncommon
Carex abscondita		Concealed Sedge	S2?		G4G5	Uncommon
Carex aestivalis		Summer-sedge	S2S3		G4	Uncommon
Carex aquatilis var. substricta	C. substricta	Water-sedge	SNR		G5TNR	Uncommon
Carex bicknellii		Bicknell's Sedge	S1S2	IND.	G5	Uncommon
Carex buxbaumii		Buxbaum's Sedge	S2?		G5	Uncommon
Carex cristatella		Crested Sedge	S2?		G5	Uncommon
Carex debilis var. debilis		Southern Stalked Sedge	SNR		G5T5	Uncommon
Carex deflexa		Mountain Sedge	S1		G5	Historic Rediscovered
Carex diandra		Panicled Sedge	S1S2		G5	Uncommon
Carex emoryi		Emory's Sedge	S1		G5	Uncommon
Carex exilis		Bog Sedge	S2S3		G5	Uncommon
Carex haydenii		Hayden's Sedge	S1S2		G5	Uncommon
Carex limosa		Mud Sedge	S2?		G5	Uncommon
Carex molesta		Troublesome Sedge	S1?		G4	Uncommon
Carex prairea		Praire-sedge	S1?		G5	Uncommon
Carex retrorsa		Hooked Sedge	S2S3		G5	Uncommon
Carex sparganioides		Bur-sedge	S4		G5	Uncommon?
Carex viridula ssp. viridula		Little Green Sedge	S1S2		G5T5	Uncommon
Caulophyllum giganteum	C. thalictroides var. giganteum	Early Blue Cohosh	S2S3		G4G5Q	Uncommon
Chenopodium simplex	C. gigantospermum; Chenopodiumhybridum var. gigantospermum	Maple-leaf Goosefoot	S3?		G5	Uncommon
Chenopodium standleyanum	C. hybridum var. standleyanum	Woodland-goosefoot	SNR	IND.	G5	Introduced?
Cirsium horridulum var. horridulum		Yellow Thistle	S2S3		G5T5	Uncommon
Coeloglossum viride	C. viride var. virescens; Habenaria viridis var. bracteata	Frog-orchis	S3		G5
Corema conradii		Broom Crowberry	S3		G4	MESA- Delisted
Coreopsis rosea		Pink Tickseed	S3	1	G3	Uncommon
Crataegus keepii	C. brunetiana, C. searsii	Keep's Hawthorn	SNR		GNR	Uncommon?
Cuscuta coryli		Pondshore-dodder	S1?	2	G5?	Uncommon
Cuscuta polygonorum		Smartweed-dodder	S3S4		G5	Introduced?
Cyperus odoratus	C. ferruginescens	Saltmarsh Flatsedge	S1S2	IND.	G5	MESA- Delisted
Cyperus polystachyos	C. polystachyos var. texensis	Texas Flatsedge	S2S3		G5	Uncommon
Cyperus retrorsus		Pine Barren Flatsedge	S1?		GNR	Uncommon
Cypripedium parviflorum var. pubescens	C. calceolus var. pubescens	Woodland Yellow Lady's-slipper	S1?	IND.	G5T5	Uncommon
Cystopteris laurentiana		Laurentian Bladder Fern	S2S3		G3	Uncommon
Desmodium canescens		Hoary Tick-trefoil	S3	2	G5	Uncommon
Dichanthelium acuminatum ssp. acuminatum	D. acuminatum var. acuminatum; Panicum auburne	Auburn Panic-grass	S1?		G5T5	Uncommon
Digitaria cognata ssp. cognata	Leptoloma cognatum	Fall Witch-grass	SNR		G5T5	Introduced?
Dioscorea villosa		Wild Yam	SNR		G4G5	Introduced?
Diplazium pycnocarpon	Athyrium pycnocarpon	Glade Fern	S3		G5	MESA- Delisted
Dryopteris campyloptera	D. spinulosa var. americana	Mountain Wood-fern	S3?		G5	Uncommon
Dryopteris goldiana		Goldie's Fern	S3		G4	MESA- Delisted
Elatine triandra		European Waterwort	SNR		G5	Introduced?
Eleocharis engelmannii var. detonsa		Englemann's Spike-rush	S1S2		G4G5TNR	Uncommon
Eleocharis engelmannii var. engelmannii		Englemann's Spike-rush	S1S2		G4G5TNR	Uncommon
Eleocharis erythropoda	E. calva	Redfoot Spike-rush	S3		G5	MESA- Delisted
Eleocharis melanocarpa		Black-fruited Spike-rush	S3		G4	MESA- Delisted
Eleocharis rostellata		Beaked or Saltmarsh Sedge	S2?	IND.	G5	Uncommon
Elymus macgregorii		Early Wild Rye	S2?		GNR	Uncommon
Elymus trachycaulus ssp. trachycaulus	Agropyron trachycaulum var. novae-angliae	Slender Wild Rye	SNR		G5T5	Uncommon
Equisetum pratense		Meadow-horsetail	S2		G5	Uncommon
Equisetum variegatum ssp. variegatum		Variegated Scouring Rush	S3		G5T5	MESA- Delisted
Eragrostis capillaris		Lace-grass	S2?	IND.	G5	Uncommon
Erechtites hieraciifolius var. megalocarpus	E. megalocarpus	Seaside Pilewort	S2S3		G5T3	Uncommon
Eurybia radula	Aster radula	Rough Aster	S1S2		G5	Uncommon
Fuirena pumila		Annual Umbrella-sedge	S3	3	G4	MESA- Delisted
Galearis spectabilis	Orchis spectabilis	Showy Orchis	S2S3		G5	Uncommon
Gentiana linearis		Narrow-leaved Gentian	S2?		G4G5	Uncommon
Gentianella quinquefolia	G. quinquefolia ssp. quinquefolia	Stiff Gentian	S2S3	2	G5	Uncommon
Geranium bicknellii		Bicknell's Crane's Bill	S2S3		G5	Uncommon
Geum virginianum		Virginia Avens	S2?		G5	Uncommon
Hedeoma hispida		Rough Pennyroyal	S1		G5	Introduced?
Helenium autumnale	H. tenuifolium	Common Sneezeweed	S3?		G5	Uncommon
Heteranthera dubia	Zosterella dubia	Water Star-grass	S2S3		G5	Uncommon
Hottonia inflata		Featherfoil	S3		G4	Uncommon
Hypopitys lanuginosa	Monotropa lanuginosa	Hairy Pine-sap	SNR		GNR	Uncommon?
Isotria verticillata		Large Whorled Pogonia	S3S4		G5	MESA- Delisted
Juglans cinerea		Butternut	S4?	IND.	G4	Uncommon
Juncus ambiguus	J. bufonius var. halophilus	Seaside Toad-rush	S1?		G5	Historic Rediscovered
Juncus biflorus		Two-flowered Rush	SNR		G5	Taxonomic Issue
Juncus nodosus		Knotted Rush	SNR		G5	Uncommon
Juncus torreyi		Torrey's Rush	SNR	2	G5	Introduced?
Juniperus horizontalis		Prostrate Juniper	SNR		G5	Introduced?
Lactuca hirsuta	L. hirsuta var. sanguinea	Hairy Wild Lettuce	S2S3		G5?	Uncommon
Lathyrus palustris	L. palustris var. myrtifolius; L. palustris var. pilosus	Vetchling, Marsh-pea	SNR		G5	Uncommon
Lechea minor		Thyme-leaf Pinweed	S2S3	IND.	G5	Uncommon
Lespedeza angustifolia		Narrow-leaved Bush-clover	S3?		G5	Uncommon
Lespedeza frutescens	L. violacea	Violet Bush-clover	S3		G5	MESA- Delisted
Lilaeopsis chinensis		Lilaeopsis	S2?		G5	Uncommon
Linnaea borealis ssp. americana		Twinflower	S3		G5T5	Uncommon
Linum striatum	L. striatum var. multijugum	Panicled Yellow Flax, Ridgestem Yellow Flax	S2S3		G5	Uncommon
Listera australis	Neottia australis	Southern Twayblade	S1		GNR	Uncommon
Lobelia kalmii		Brook-lobelia	S2S3		G5	Uncommon
Lonicera sempervirens		Trumpet Honeysuckle	SNR		G5	introduced?
Lupinus perennis		Wild Lupine	S3S4	3	G5	Uncommon
Luzula bulbosa		Bulbous Wood-rush	S2?		G5	Uncommon
Luzula multiflora ssp. frigida	L. multiflora var. fusconigra	Boreal Wood-rush	SNR		G5T5	Uncommon
Lycopus amplectens		Sessile Water-horehound	S2S3		G5	Uncommon
Lythrum alatum		Winged Loosestrife	S1?		G5	Uncommon
Maianthemum trifolium		Three-leaved Solomon's Seal	S3?		G5	Uncommon
Malaxis unifolia		Green Adder's Mouth	S2?		G5	Uncommon
Menispermum canadense		Moonseed	S3		G5	Uncommon
Moneses uniflora		One-flowered Pyrola	S2S3		G5	Uncommon
Myriophyllum sibiricum	M. exalbescens	Northern Water-milfoil	S1S2		G5	Uncommon
Nabalus albus	Prenanthes alba	White Lettuce	SNR		G5	Uncommon
Parietaria pensylvanica		Rock-pellitory	S2S3		G5	Uncommon
Paronychia fastigiata var. fastigiata		Hairy Forked Chickweed	SNR		G5T5	Introduced?
Paspalum setaceum var. psammophilum	P. psammophilum	Sand Bead-grass	S2S3	2	G5T4?	Uncommon
Paspalum setaceum var. setaceum		Small Fruited Bead-grass or Slender Bead-grass	S3?		G5T5	Uncommon
Pellaea atropurpurea		Purple Cliff-brake	S3		G5	MESA- Delisted
Phragmites australis ssp. americanus		Phragmites, North American Reed	S3		G5T4	Uncommon
Pinus resinosa		Red Pine	S2S3		G5	Uncommon
Piptochaetium avenaceum	Stipa avenacea	Black Oatgrass	SNR		G5	Uncommon
Plantago pusilla		Dwarf Plantain	S1?		G5	Introduced?
Platanthera hookeri	Habenaria hookeri	Hooker's Orchis	S2?		G4	Uncommon
Platanthera huronensis	P. hyperborea var. huronensis; Habenaria huronensis	Northern Green Orchis	S2?		G5T5?	Uncommon
Platanthera macrophylla	P. orbiculata var. macrophylla; Habenaria macrophylla	Large Round-leaved Orchis	S2?		G5T4	Uncommon
Platanthera orbiculata	Habenaria orbiculata	Round-leaved Orchis or Orchid	S1S2		G5	Uncommon
Podophyllum peltatum		May-apple	SNR	2	G5	Introduced?
Podostemum ceratophyllum		Threadfoot	S2		G5	MESA- Delisted
Polygala nuttallii		Nuttall's Milkwort	S3		G5	MESA- Delisted
Polygala verticillata	P. verticillata var. isocycla	Whorled Milkwort	S2S3	IND.	G5	Uncommon
Polygonum tenue		Rock Knotweed	S2S3		G5	Uncommon
Populus balsamifera ssp. balsamifera		Balsam-poplar	S2S3		G5T5	Uncommon
Potamogeton gemmiparus	P. pusillus var. gemmiparus	Tiny Pondweed	S2?	IND.	G5T3	Uncommon?
Potamogeton obtusifolius		Blunt-leaved Pondweed	S1?		G5	Uncommon
Pseudognaphalium macounii	Gnaphalium viscosum; Gnaphalium macounii	Clammy Everlasting	S1S2		G5	Uncommon
Pteridium aquilinum ssp. pseudocaudatum		Pine Barrens Braken	SNR		G5T5	Uncommon
Quercus stellata		Post Oak	S3S4		G5	MESA- Delisted
Ranunculus allegheniensis		Allegheny Buttercup	S2?	2	G4G5	Uncommon
Ranunculus fascicularis		Early Buttercup	S2?		G5	Uncommon
Rhododendron periclymenoides	R. nudiflorum	Pinxter-flower	S2?		G5	Uncommon
Ribes americanum		Wild Black Currant	S3S4		G5	MESA- Delisted
Ribes rotundifolium		Round-leaved Gooseberry	S1?	IND.	G5	Uncommon
Ribes triste		Swamp Red Currant	S3		G5	MESA- Delisted
Rosa blanda		Smooth Rose	S2S3		G5	Uncommon
Rubus cuneifolius	R. chapmanii	Sand-blackberry	S1S2	2	G5	Uncommon
Rumex hastatulus		Dune-sorrel	SNR		G5	Introduced?
Sagina decumbens ssp. decumbens		Trailing Pearlwort	SNR		G5T5	Introduced?
Sagina nodosa ssp. nodosa		Knotted Pearlwort	SU	IND.	G5T5?	Introduced?
Sagittaria rigida		Mud Arrowhead	S2?		G5	Uncommon
Salix candida		Hoary Willow	S3		G5	MESA- Delisted
Salix pedicellaris	S. pedicellaris var. hypoglauca; S. pedicellaris var. tenuescens	Bog Willow	S2?		G5	Uncommon
Salix serissima		Autumn Willow	S3		G4	MESA- Delisted
Sanicula trifoliata		Trefoil Sanicle	S2S3		G4	Uncommon
Schoenoplectus acutus var. acutus	Scirpus acutus	Hard-stemmed Bulrush	S2S3		G5T5	Uncommon
Schoenoplectus torreyi	Scirpus torreyi	Torrey's Bulrush	S2?		G5?	Uncommon
Scirpus pendulus	S. lineatus	Pendulous Bulrush	S3		G5	MESA- Delisted
Scirpus polyphyllus		Appalacian Bulrush	S2?	2	G5	Uncommon
Scleria reticularis		Pondshore Nut-sedge	S3	1	G4	MESA- Delisted
Scutellaria parvula var. missouriensis	S. parvula var. leonardii; S. ambigua	Small Skullcap	SNR	2	G4T4	Introduced?
Sedum ternatum		Mountain-stonecrop	SNR		G5	Introduced?
Selaginella rupestris		Rock Spikemoss	S3S4		G5	MESA- Delisted
Silene caroliniana ssp. pensylvanica		Wild Pink	S2S3		G5T4T5	Uncommon
Solidago speciosa var. speciosa		Showy Goldenrod	S2S3		G5T5?	Uncommon
Sparganium androcladum		Shining Bur-reed	S3?		G4G5	Uncommon
Sparganium angustifolium	S. emersum var. angustifolium; S. emersum var. multipedunculatum; S. multipedunculatum	Narrow-leaved Bull-reed	S2S3		G5	Uncommon
Sparganium fluctuans		Floating Bull-reed	S2S3		G5	Uncommon
Spiranthes lucida		Shining or Wide-leaved Ladies'-tresses	S2?		G5	Uncommon
Spiranthes tuberosa	S. tuberosa var. grayi	Little Ladies'-tresses	S3S4		G5	MESA- Delisted
Sporobolus compositus var. compositus	S. asper	Tall Dropseed	SNR		G5T5	Introduced?
Sporobolus cryptandrus		Sand Dropseed	S2?		G5	Uncommon
Stachys hyssopifolia		Hyssop Hedge-nettle	S3S4		G4G5	MESA- Delisted
Stellaria borealis ssp. borealis	S. calycantha; S. calycantha var. floribunda; S. calycantha var. isophylla	Northern Starwort	S2S3		G5T5	Uncommon
Streptopus amplexifolius		Clasping-leaf Twisted-stalk	S3?		G5	MESA- Delisted
Suaeda maritima ssp. richii	S. richii	Rich's Sea-blite	S2S3	IND.	G5T3	MESA- Delisted
Utricularia minor		Lesser Bladderwort	S2S3		G5	Uncommon
Uvularia grandiflora		Large-flowered Bellwort	S3		G5	MESA- Delisted
Verbesina alternifolia		Wingstem	SNR		G5	Introduced?
Veronica serpyllifolia ssp. humifusa	Veronica tenella	Northern Thyme-leaf Speedwell	SNR		G5T5?	Introduced?
Viola renifolia	V. renifolia var. brainerdii	Kidney-leaf Violet	S1S2		G5	Uncommon
Viola rostrata		Long-spurred Violet	S2S3		G5	Uncommon
Viola selkirkii		Great-spurred Violet	S1S2		G5?	Uncommon
Viola subsinuata	V. palmata	Early Blue Violet	S1S2	IND.	G3G5	Uncommon
Wolffia borealis	W. punctata	Northern Water-meal	SNR		G5	Uncommon
Wolffiella gladiata	W. floridana	Sickle Water-meal	SNR	2	G5	Uncommon
Xyris montana		Northern Yellow-eyed Grass	S2?		G4	Uncommon
Xyris smalliana	X. congdonii	Quagmire Yellow-eyed grass	S4		G5	Uncommon?
Zizania palustris var. palustris	Z. aquatica var. angustifolia	Slender Wild Rice	S1S2		G4G5T4T5	Uncommon

Updated: 04/17/2012