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Active Inventory List

This list contains the family name, plant name, Heritage rank, and state legal status for 574 plants that the NY Natural Heritage Program actively tracks and surveys. It contains most plant taxa (species, subspecies and varieties) that have fewer than 30 occurrences in the state and are considered highly vulnerable to extirpation. They have been documented by a Heritage report and a herbarium specimen or photograph in the last 20-30 years. It also contains rare historical taxa, those plants that have not been documented in the last 20-30 years, and the extirpated taxa, those that are considered no longer extant in the state.

To sort the following table, click on the sort arrows next to any of the heading names as needed. Detailed information regarding categories; rank; and legal status can be found on this page by scrolling past the table or by simply using one of the links below.

Explanation of Categories | Explanation of Heritage Ranks and Codes | New York State Legal Status

Active Inventory List
Family Scientific Name Common Name Global Rank State Rank NYS Status
Adoxaceae Adoxa moschatellina Musk Root G5 S1 E
Aizoaceae Sesuvium maritimum Sea Purslane G5 S1 E
Alismataceae Alisma gramineum Water-plantain G5 S2S3 U
Alismataceae Echinodorus tenellus Burhead G5? SX U
Alismataceae Sagittaria montevidensis var. spongiosa Spongy Arrowhead G5T4 S2 T
Alismataceae Sagittaria teres Quill-leaf Arrowhead G3 S1 E
Amaranthaceae Amaranthus pumilus Seabeach Amaranth G2 S2 E
Annonaceae Asimina triloba Pawpaw G5 S2 T
Apiaceae Angelica lucida Seacoast Angelica G5 S2 E
Apiaceae Berula erecta Wild Parsnip G4G5 SX U
Apiaceae Chaerophyllum procumbens Spreading Chervil G5 S1 E
Apiaceae Erigenia bulbosa Harbinger-of-spring G5 S1 E
Apiaceae Eryngium aquaticum Marsh Eryngo G4 SX U
Apiaceae Hydrocotyle ranunculoides Floating Pennywort G5 S1 E
Apiaceae Hydrocotyle verticillata Whorled-pennywort G5 S1 E
Apiaceae Ligusticum scothicum ssp. scothicum Scotch Lovage G5T4T5 S1 E
Apiaceae Lilaeopsis chinensis Eastern Grasswort G5 S2 T
Apiaceae Oxypolis rigidior Stiff Cowbane G5 SH E
Apiaceae Thaspium barbinode Meadow-parsnip G5 S1 U
Apiaceae Thaspium trifoliatum var. flavum Purple Meadow-parsnip G5T5 SX U
Araceae Orontium aquaticum Golden Club G5 S2 T
Aristolochiaceae Endodeca serpentaria Virginia Snakeroot G4 S2 E
Asclepiadaceae Asclepias purpurascens Purple Milkweed G5? S2S3 U
Asclepiadaceae Asclepias rubra Red Milkweed G4G5 SX U
Asclepiadaceae Asclepias variegata White Milkweed G5 S1 E
Asclepiadaceae Asclepias viridiflora Green Milkweed G5 S2 T
Aspleniaceae Asplenium bradleyi Bradley's Spleenwort G4 SH E
Aspleniaceae Asplenium montanum Mountain Spleenwort G5 S2S3 T
Aspleniaceae Asplenium scolopendrium var. americanum Hart's-tongue Fern G4T3 S2 T
Aspleniaceae Asplenium trichomanes-ramosum Green Spleenwort G4 S1 E
Asteraceae Ageratina aromatica var. aromatica Small White Snakeroot G5T5 S1 E
Asteraceae Arnica lanceolata ssp. lanceolata Lanceleaf Arnica G4G5T3 S1 E
Asteraceae Arnoglossum atriplicifolium Pale Indian-plantain G4G5 SH U
Asteraceae Bidens bidentoides Delmarva Beggar-ticks G3G4 S3 R
Asteraceae Bidens hyperborea var. hyperborea Estuary Beggar-ticks G4T2T4 S1 E
Asteraceae Bidens laevis Smooth Bur-marigold G5 S2 T
Asteraceae Cirsium altissimum Tall Thistle G5 SX U
Asteraceae Coreopsis rosea Rose Coreopsis G3 S3 R
Asteraceae Erechtites hieraciifolius var. megalocarpus Large Fruited Fireweed G5T3 S1 E
Asteraceae Erigeron hyssopifolius Daisy Fleabane G5 S1 E
Asteraceae Erigeron philadelphicus var. provancheri Provancher's Fleabane G5T2Q S1 U
Asteraceae Eupatorium album var. album White Boneset G5T5 S1 U
Asteraceae Eupatorium album var. subvenosum Trinerved White Boneset G5T3T4 S2S3 T
Asteraceae Eupatorium leucolepis var. leucolepis White-bracted Boneset G5T5 S1 E
Asteraceae Eupatorium pubescens Serrate Round-leaf Boneset G5T5 S1 E
Asteraceae Eupatorium resinosum Pine Barrens Boneset G3 SX U
Asteraceae Eupatorium rotundifolium Round-leaf Boneset G5 SH E
Asteraceae Eupatorium torreyanum Fringed Boneset G5T4T5 S2 T
Asteraceae Eurybia radula Swamp Aster G5 SH E
Asteraceae Eurybia spectabilis Showy Aster G5 S2 T
Asteraceae Hasteola suaveolens Sweet-scented Indian-plantain G4 S1 E
Asteraceae Helianthus angustifolius Swamp Sunflower G5 S2 T
Asteraceae Lactuca floridana False Lettuce G5 S1 E
Asteraceae Lactuca hirsuta Downy Lettuce G5? S1 E
Asteraceae Liatris cylindracea Slender Blazing-star G5 S1 E
Asteraceae Liatris scariosa var. nieuwlandii Nieuwland's Blazing-star G5?T3T5 S1 U
Asteraceae Liatris scariosa var. novae-angliae Northern Blazing-star G5?T3 S2 T
Asteraceae Oligoneuron houghtonii Houghton's Goldenrod G3 S1 E
Asteraceae Oligoneuron ohioense Ohio Goldenrod G4 S2 T
Asteraceae Oligoneuron rigidum var. rigidum Stiff-leaf Goldenrod G5T5 S2 T
Asteraceae Omalotheca sylvatica Woodland Cudweed G4 S1 E
Asteraceae Petasites frigidus var. palmatus Sweet Coltsfoot G5T5 S1 E
Asteraceae Prenanthes boottii Boott's Rattlesnake-root G2 S1 E
Asteraceae Prenanthes crepidinea Nodding Rattlesnake-root G4 SH E
Asteraceae Prenanthes racemosa var. racemosa Glaucous Rattlesnake-root G5T4 SX U
Asteraceae Pseudognaphalium helleri ssp. micradenium Catfoot G4G5T3? SH E
Asteraceae Sericocarpus linifolius Flax-leaf Whitetop G5 S2 T
Asteraceae Smallanthus uvedalius Bear's-foot G4G5 SH E
Asteraceae Solidago latissimifolia Coastal Goldenrod G5 S1 E
Asteraceae Solidago leiocarpa Alpine Goldenrod G4 S2 T
Asteraceae Solidago sempervirens var. mexicana Seaside Goldenrod G5T5? S1 E
Asteraceae Solidago simplex var. monticola Rand's Mountain Goldenrod G5T4 S2 T
Asteraceae Solidago simplex var. racemosa Mountain Goldenrod G5T3? S1 E
Asteraceae Symphyotrichum boreale Northern Bog Aster G5 S2 T
Asteraceae Symphyotrichum ciliolatum Lindley's Aster G5 S1 E
Asteraceae Symphyotrichum concolor var. concolor Silvery Aster G5T5 S1 E
Asteraceae Symphyotrichum laeve var. concinnum Smooth Blue Aster G5T4 SH E
Asteraceae Symphyotrichum lanceolatum var. interior Tall White Aster G5T5 SH E
Asteraceae Symphyotrichum oolentangiense Sky-blue Aster G5 S1 E
Asteraceae Symphyotrichum subulatum var. subulatum Saltmarsh Aster G5T5 S2 T
Asteraceae Vernonia gigantea ssp. gigantea Tall Ironweed G5T5 S1 E
Berberidaceae Jeffersonia diphylla Twin-leaf G5 S2 T
Betulaceae Betula glandulosa Tundra Dwarf Birch G5 S1 E
Betulaceae Betula minor Dwarf White Birch G4Q S1 E
Betulaceae Betula pumila Swamp Birch G5 S2 T
Boraginaceae Cynoglossum virginianum var. boreale Northern Wild Comfrey G5T4T5 S1S2 E
Boraginaceae Cynoglossum virginianum var. virginianum Wild Comfrey G5T5 SH E
Boraginaceae Hackelia deflexa var. americana Northern Stickseed G5T5 S1 E
Boraginaceae Lithospermum canescens Hoary Puccoon G5 SX U
Boraginaceae Lithospermum caroliniense var. croceum Golden Puccoon G4G5T4T5 SH E
Boraginaceae Onosmodium virginianum Virginia False Gromwell G4 S1 E
Brassicaceae Boechera dentata Toothed Rock-cress G5 S2 E
Brassicaceae Boechera grahamii Purple Rock-cress G5 S2 R
Brassicaceae Boechera missouriensis Green Rock-cress G5 S2 T
Brassicaceae Boechera stricta Drummond's Rock-cress G5 S2 E
Brassicaceae Cardamine douglassii Purple Cress G5 S2S3 U
Brassicaceae Cardamine longii Long's Bittercress G3? S2 T
Brassicaceae Cardamine rotundifolia Mountain Watercress G4 S1 E
Brassicaceae Descurainia pinnata ssp. brachycarpa Northern Tansy-mustard G5T5 S1 E
Brassicaceae Draba arabisans Rock-cress G4 S2 T
Brassicaceae Draba glabella Smooth Rock-cress G4G5 S1 E
Brassicaceae Draba reptans Carolina Whitlow-grass G5 S2 T
Brassicaceae Rorippa aquatica Lake-cress G4? S2 T
Brassicaceae Subularia aquatica var. americana Water Awlwort G5T5 S1S2 E
Callitrichaceae Callitriche hermaphroditica Autumnal Water-starwort G5 S1 E
Callitrichaceae Callitriche terrestris Terrestrial Starwort G5 S2S3 T
Campanulaceae Campanulastrum americanum Tall Bellflower G5 S1 U
Caprifoliaceae Triosteum angustifolium Narrow-leaf Feverwort G5 SX U
Caprifoliaceae Viburnum dentatum var. venosum Southern Arrowwood G5T4T5 S2 T
Caprifoliaceae Viburnum edule Squashberry G5 S2 T
Caprifoliaceae Viburnum nudum var. nudum Possum-haw G5T5 S1 E
Caryophyllaceae Sagina decumbens ssp. decumbens Small-flowered Pearlwort G5T5 S1 E
Caryophyllaceae Silene caroliniana ssp. pensylvanica Wild Pink G5T4T5 S2 V
Caryophyllaceae Spergularia canadensis var. canadensis Northern Sand-spurry G5T5 SX U
Caryophyllaceae Stellaria longipes Longstalk Starwort G5 S2 T
Celastraceae Euonymus americanus American Strawberry-bush G5 S1 E
Chenopodiaceae Atriplex dioica Thickleaf Orach G4? S1 E
Chenopodiaceae Atriplex glabriuscula Seaside Orach G4 S1 E
Chenopodiaceae Chenopodium berlandieri var. macrocalycium Large Calyx Goosefoot G5T4 S1S2 E
Chenopodiaceae Chenopodium rubrum Red Pigweed G5 S2 T
Chenopodiaceae Salicornia bigelovii Dwarf Glasswort G5 S2S3 T
Chenopodiaceae Suaeda linearis Narrow-leaf Sea-blite G5 S1 E
Chenopodiaceae Suaeda rolandii Roland's Sea-blite G1G2 S1 E
Cistaceae Crocanthemum dumosum Bushy Rockrose G3 S2 T
Cistaceae Crocanthemum propinquum Early Frostweed G4 S2S3 U
Cistaceae Lechea pulchella var. moniliformis Bead Pinweed G5T4 S1 E
Cistaceae Lechea tenuifolia Slender Pinweed G5 S2 T
Clusiaceae Hypericum adpressum Creeping St. John's-wort G3 S2 E
Clusiaceae Hypericum densiflorum Bushy St. John's-wort G5 S1 E
Clusiaceae Hypericum denticulatum Coppery St. John's-wort G5 S1 E
Clusiaceae Hypericum gymnanthum Clasping-leaved St. John's-wort G4 SX U
Clusiaceae Hypericum hypericoides ssp. multicaule St. Andrew's Cross G5T4 S1 E
Clusiaceae Hypericum kalmianum Kalm's St. John's-wort G4 SX U
Clusiaceae Hypericum prolificum Shrubby St. John's-wort G5 S2 T
Commelinaceae Commelina erecta var. erecta Slender Dayflower G5T5 SX U
Convolvulaceae Ipomoea pandurata Wild Potato-vine G5 S1 E
Cornaceae Cornus drummondii Rough-leaf Dogwood G5 S1 E
Crassulaceae Crassula aquatica Water Pigmyweed G5 S1 E
Crassulaceae Hylotelephium telephioides Live-forever G4 SH E
Crassulaceae Rhodiola integrifolia ssp. leedyi Leedy's Roseroot G5T1 S1 E
Crassulaceae Rhodiola rosea Roseroot G5 S1 E
Cupressaceae Chamaecyparis thyoides Atlantic White Cedar G4 S2 R
Cupressaceae Juniperus horizontalis Creeping Juniper G5 S1 E
Cuscutaceae Cuscuta campestris Field Dodder G5 S1 U
Cuscutaceae Cuscuta cephalanthi Button-bush Dodder G5 S1 E
Cuscutaceae Cuscuta obtusiflora var. glandulosa Southern Dodder G5T4T5 S1 E
Cuscutaceae Cuscuta polygonorum Smartweed Dodder G5 S1 E
Cyperaceae Bolboschoenus maritimus ssp. paludosus Seaside Bulrush G5T5 S2 E
Cyperaceae Bolboschoenus novae-angliae Saltmarsh Bulrush G5 S1 E
Cyperaceae Carex abscondita Thicket Sedge G4G5 S1 T
Cyperaceae Carex aggregata Glomerate Sedge G5 SH E
Cyperaceae Carex amphibola Narrow-leaved Sedge G5 S1 E
Cyperaceae Carex arcta Northern Clustered Sedge G5 S1 E
Cyperaceae Carex atratiformis Scabrous Black Sedge G5 S1 E
Cyperaceae Carex backii Back's Sedge G4 S2 T
Cyperaceae Carex barrattii Barratt's Sedge G4 S1 E
Cyperaceae Carex bigelowii Bigelow's Sedge G5 S2 T
Cyperaceae Carex bullata Button Sedge G5 S1 E
Cyperaceae Carex buxbaumii Brown Bog Sedge G5 S2 T
Cyperaceae Carex capillaris Hair-like Sedge G5 S1 E
Cyperaceae Carex careyana Carey's Sedge G4G5 S1S2 U
Cyperaceae Carex caroliniana Carolina Sedge G5 SH E
Cyperaceae Carex chordorrhiza Creeping Sedge G5 S2 T
Cyperaceae Carex collinsii Collins' Sedge G4 S1 E
Cyperaceae Carex conjuncta Soft Fox Sedge G4G5 SH E
Cyperaceae Carex crawei Crawe's Sedge G5 S2 T
Cyperaceae Carex cumulata Clustered Sedge G4? S2S3 T
Cyperaceae Carex davisii Davis' Sedge G4 S2 T
Cyperaceae Carex debilis var. debilis White-edge Sedge G5T5 S2 U
Cyperaceae Carex decomposita Cypress-knee Sedge G3 SH E
Cyperaceae Carex echinoides Bristly Nodding Sedge G5 S1 U
Cyperaceae Carex emoryi Emory's Sedge G5 S1S2 E
Cyperaceae Carex formosa Handsome Sedge G4 S2 T
Cyperaceae Carex frankii Frank's Sedge G5 S1 E
Cyperaceae Carex garberi Elk Sedge G5 S1 E
Cyperaceae Carex glaucodea Glaucous Sedge G5 S2S3 E
Cyperaceae Carex gynocrates Northern Bog Sedge G5 S1 E
Cyperaceae Carex haydenii Cloud Sedge G5 S1 E
Cyperaceae Carex hormathodes Marsh Straw Sedge G4G5 S2S3 T
Cyperaceae Carex houghtoniana Houghton's Sedge G5 S2 T
Cyperaceae Carex jamesii James' Sedge G5 S2 T
Cyperaceae Carex livida Livid Sedge G5 S1 E
Cyperaceae Carex lupuliformis False Hop Sedge G4 S2 R
Cyperaceae Carex meadii Mead's Sedge G4G5 SH E
Cyperaceae Carex merritt-fernaldii Fernald's Sedge G5 S2S3 T
Cyperaceae Carex mesochorea Midland Sedge G4G5 S2 E
Cyperaceae Carex mitchelliana Mitchell's Sedge G4 S1S2 T
Cyperaceae Carex molesta Troublesome Sedge G4 S2S3 T
Cyperaceae Carex nigra Black Sedge G5 S1 E
Cyperaceae Carex nigromarginata Black-edge Sedge G5 S2 E
Cyperaceae Carex polymorpha Variable Sedge G3 SX U
Cyperaceae Carex retroflexa Reflexed Sedge G5 S2S3 E
Cyperaceae Carex reznicekii Reznicek's Sedge G5 S1S2 U
Cyperaceae Carex richardsonii Richardson's Sedge G4 SX U
Cyperaceae Carex sartwellii Sartwell's Sedge G4G5 S1S2 T
Cyperaceae Carex schweinitzii Schweinitz's Sedge G3G4 S2S3 T
Cyperaceae Carex scirpoidea ssp. scirpoidea Canadian Single-spike Sedge G5T5 S1 E
Cyperaceae Carex shortiana Short's Sedge G5 S1 E
Cyperaceae Carex straminea Straw Sedge G5 S1 E
Cyperaceae Carex striatula Lined Sedge G4G5 S1 E
Cyperaceae Carex styloflexa Bent Sedge G4G5 S1 E
Cyperaceae Carex sychnocephala Many-head Sedge G4 SH E
Cyperaceae Carex tenuiflora Sparse-flowered Sedge G5 S1 E
Cyperaceae Carex tincta Tinged Sedge G4G5 SH E
Cyperaceae Carex typhina Cat-tail Sedge G5 S1 T
Cyperaceae Carex vaginata Sheathed Sedge G5 S1 E
Cyperaceae Carex venusta Dark-green sedge G4 S1 E
Cyperaceae Carex wiegandii Wiegand's Sedge G4 S1 E
Cyperaceae Cyperus echinatus Globose Flatsedge G5 S1 E
Cyperaceae Cyperus flavescens Yellow Flatsedge G5 S1 E
Cyperaceae Cyperus lupulinus ssp. lupulinus Hop Sedge G5T5? S2 T
Cyperaceae Cyperus plukenetii Galingale G5 SX U
Cyperaceae Cyperus polystachyos var. texensis Coast Flatsedge G5T5 S1S2 E
Cyperaceae Cyperus retrorsus var. retrorsus Retrorse Flatsedge G5T5 S1 E
Cyperaceae Eleocharis aestuum Tidal Spikerush G3 S1 U
Cyperaceae Eleocharis diandra Wright's Spikerush G1G2 S1 U
Cyperaceae Eleocharis engelmannii Engelmann's Spikerush G4G5 S1 E
Cyperaceae Eleocharis equisetoides Knotted Spikerush G4 S2 T
Cyperaceae Eleocharis fallax Creeping Spikerush G4G5 S1 E
Cyperaceae Eleocharis ovata Ovate Spikerush G5 S1S2 E
Cyperaceae Eleocharis quadrangulata Angled Spikerush G4 S1 E
Cyperaceae Eleocharis tenuis var. pseudoptera Slender Spikerush G5T5? S1 E
Cyperaceae Eleocharis tortilis Twisted Spikerush G5 SX U
Cyperaceae Eleocharis tricostata Three-ribbed Spikerush G4 S1 E
Cyperaceae Eleocharis tuberculosa Long-tubercled Spikerush G5 S2 T
Cyperaceae Eleocharis uniglumis var. halophila Salt-marsh Spikerush G4T4 S2 T
Cyperaceae Eriophorum angustifolium ssp. angustifolium Narrow-leaf Cottongrass G5T5 SH E
Cyperaceae Fimbristylis caroliniana Carolina Fimbry G4 SX U
Cyperaceae Fimbristylis castanea Marsh Fimbry G5 S2 T
Cyperaceae Fimbristylis puberula var. puberula Hairy Fimbry G5T5 SX U
Cyperaceae Lipocarpha micrantha Dwarf Bulrush G5 S1 E
Cyperaceae Rhynchospora cephalantha Capitate Beakrush G5 SX U
Cyperaceae Rhynchospora chalarocephala Loose-headed Beakrush G5 SX U
Cyperaceae Rhynchospora inundata Drowned Beakrush G4? S2 T
Cyperaceae Rhynchospora nitens Short-beaked Beakrush G4? S2 T
Cyperaceae Rhynchospora pallida Pale Beakrush G3 SH U
Cyperaceae Rhynchospora recognita Globe Beakrush G5? SX U
Cyperaceae Rhynchospora scirpoides Long-beaked Beakrush G4 S3 R
Cyperaceae Rhynchospora torreyana Torrey's Beakrush G4 SX E
Cyperaceae Schoenoplectus heterochaetus Slender Bulrush G5 S1 E
Cyperaceae Scirpus ancistrochaetus Northeastern Bulrush G3 SX U
Cyperaceae Scirpus georgianus Georgia Bulrush G5 S1 E
Cyperaceae Scirpus longii Long's Bulrush G2G3 SX U
Cyperaceae Scleria minor Slender Nutrush G4 S1 E
Cyperaceae Scleria muehlenbergii Reticulate Nutrush G5 S1 E
Cyperaceae Scleria pauciflora var. caroliniana Few-flowered Nutrush G5T4T5 S1 E
Cyperaceae Scleria triglomerata Whip Nutrush G5 S1 T
Cyperaceae Scleria verticillata Low Nutrush G5 S1 E
Cyperaceae Trichophorum cespitosum ssp. cespitosum Deer's Hair Sedge G5T5 S2 T
Cyperaceae Trichophorum clintonii Clinton's Clubrush G4 S1 E
Dennstaedtiaceae Pteridium aquilinum var. pseudocaudatum Southeastern Bracken G5T5 SH U
Diapensiaceae Diapensia lapponica var. lapponica Diapensia G5T3T5 S2 T
Diapensiaceae Pyxidanthera barbulata Flowering Pixiemoss G4 S1 E
Dryopteridaceae Cystopteris protrusa Lowland Fragile Fern G5 S1 E
Dryopteridaceae Dryopteris celsa Log Fern G4 S1 E
Dryopteridaceae Dryopteris fragrans Fragrant Cliff Fern G5 S1 E
Dryopteridaceae Polystichum lonchitis Northern Holly-fern G5 SH E
Dryopteridaceae Woodsia alpina Alpine Cliff Fern G4 S1 E
Dryopteridaceae Woodsia glabella Smooth Cliff Fern G5 S1 E
Dryopteridaceae Woodsia oregana ssp. cathcartiana Oregon Cliff Fern G5T5 SX U
Ebenaceae Diospyros virginiana Persimmon G5 S2 T
Elatinaceae Elatine americana American Waterwort G4 S1 E
Empetraceae Corema conradii Broom Crowberry G4 S1 E
Empetraceae Empetrum nigrum Black Crowberry G5 S3 R
Equisetaceae Equisetum laevigatum Smooth Scouring Rush G5 SX E
Equisetaceae Equisetum palustre Marsh Horsetail G5 S2 T
Equisetaceae Equisetum pratense Meadow Horsetail G5 S2 T
Ericaceae Gaylussacia bigeloviana Northern Dwarf Huckleberry G4G5 S1S2 E
Ericaceae Harrimanella hypnoides Moss-heather G5 SX U
Ericaceae Kalmia procumbens Alpine Azalea G5 S1 E
Ericaceae Rhododendron canadense Rhodora G5 S2 T
Ericaceae Rhododendron lapponicum Lapland Rosebay G5 S1 E
Ericaceae Vaccinium boreale High-mountain Blueberry G4 S2 E
Ericaceae Vaccinium cespitosum Dwarf Blueberry G5 S1 E
Eriocaulaceae Eriocaulon parkeri Estuary Hatpins G3 SX U
Euphorbiaceae Acalypha virginica Virginia Three-seeded Mercury G5 S1 E
Euphorbiaceae Euphorbia ipecacuanhae American Ipecac G5 S1 E
Fabaceae Astragalus neglectus Cooper's Milkvetch G4 S1 E
Fabaceae Crotalaria sagittalis Rattlebox G5 S1 E
Fabaceae Desmodium ciliare Little-leaf Tick-trefoil G5 S2S3 T
Fabaceae Desmodium humifusum Spreading Tick-trefoil G1G2Q SH E
Fabaceae Desmodium laevigatum Smooth Tick-trefoil G5 SH E
Fabaceae Desmodium nuttallii Nuttall's Tick-trefoil G5 SH E
Fabaceae Desmodium obtusum Stiff Tick-trefoil G4G5 S1 E
Fabaceae Desmodium pauciflorum Small-flowered Tick-trefoil G5 SH E
Fabaceae Galactia volubilis Downy Milk-pea G5 SX U
Fabaceae Glycyrrhiza lepidota American Licorice G5 SX U
Fabaceae Gymnocladus dioicus Kentucky Coffee Tree G5 S1 E
Fabaceae Lathyrus venosus Rough Veiny Vetchling G5 S1 E
Fabaceae Lespedeza angustifolia Narrow-leaved Bush-clover G5 S2 R
Fabaceae Lespedeza stuevei Velvety Bush-clover G4? S2 T
Fabaceae Strophostyles umbellata Pink Wild Bean G5 S1 E
Fabaceae Stylosanthes biflora Pencil-flower G5 SX U
Fagaceae Quercus phellos Willow Oak G5 S1 E
Fagaceae Quercus shumardii var. shumardii Shumard Oak G5T5 S1 U
Fumariaceae Corydalis aurea Golden Corydalis G5 S2 T
Gentianaceae Bartonia paniculata ssp. paniculata Screw-stem G5T5 S1 E
Gentianaceae Frasera caroliniensis Green Gentian G5 S2 T
Gentianaceae Gentiana puberulenta Prairie Gentian G4G5 SX U
Gentianaceae Gentiana saponaria Soapwort Gentian G5 S1 E
Gentianaceae Gentianopsis virgata Lesser Fringed Gentian G5 S1 E
Gentianaceae Halenia deflexa Spurred Gentian G5 S1 E
Gentianaceae Sabatia angularis Rose-pink G5 S1 E
Gentianaceae Sabatia campanulata Slender Marsh-pink G5 S1 E
Gentianaceae Sabatia dodecandra var. dodecandra Large Marsh-pink G5?T4T5 SX U
Gentianaceae Sabatia stellaris Sea-pink G5 S2 T
Haemodoraceae Lachnanthes caroliniana Carolina Redroot G4 S1 E
Haloragaceae Myriophyllum alterniflorum Water Milfoil G5 S2 T
Haloragaceae Myriophyllum farwellii Farwell's Water-milfoil G5 S2 T
Haloragaceae Myriophyllum pinnatum Green Parrot's-feather G5 S1 E
Haloragaceae Proserpinaca pectinata Comb-leaved Mermaid-weed G5 S2 T
Hippuridaceae Hippuris vulgaris Common Mare's-tail G5 S1 E
Hydrangeaceae Hydrangea arborescens Wild Hydrangea G5 S2 E
Hydrophyllaceae Ellisia nyctelea Aunt Lucy G5 SX U
Hydrophyllaceae Hydrophyllum appendiculatum Appendaged Waterleaf G5 SH U
Hydrophyllaceae Phacelia dubia var. dubia Scorpion-weed G5T5 SX U
Hymenophyllaceae Trichomanes intricatum Appalachian Bristle Fern G4G5 S1 E
Iridaceae Iris prismatica Slender Blue Flag G4G5 S2 T
Iridaceae Iris virginica var. shrevei Southern Blue Flag G5T5 S1 E
Iridaceae Sisyrinchium mucronatum Michaux's Blue-eyed-grass G5 S1 E
Isoetaceae Isoetes riparia Riverbank Quillwort G5? S1 E
Juglandaceae Carya laciniosa Big Shellbark Hickory G5 S2 T
Juncaceae Juncus ambiguus Doubtful Toad-rush G5 S1 E
Juncaceae Juncus biflorus Large Grass-leaved Rush G5 S1 E
Juncaceae Juncus brachycarpus Short-fruit Rush G4G5 S1 E
Juncaceae Juncus debilis Weak Rush G5 S1 E
Juncaceae Juncus ensifolius Ensiform Rush G5 S1 E
Juncaceae Juncus scirpoides Scirpus-like Rush G5 S1 E
Juncaceae Juncus stygius ssp. americanus Moor Rush G5T5 SH E
Juncaceae Juncus subcaudatus Woodland Rush G5 S1 E
Juncaceae Juncus trifidus Arctic Rush G5 S2 T
Juncaceae Luzula spicata Spiked Woodrush G5 S1 E
Juncaginaceae Triglochin palustre Marsh Arrow-grass G5 S2 T
Lamiaceae Agastache nepetoides Yellow Giant-hyssop G5 S2S3 T
Lamiaceae Blephilia ciliata Downy Wood-mint G5 S1 E
Lamiaceae Calamintha arkansana Calamint G5 SX U
Lamiaceae Dracocephalum parviflorum American Dragonhead G5 S1 E
Lamiaceae Hedeoma hispida Mock-pennyroyal G5 S2S3 T
Lamiaceae Lycopus amplectens Water-horehound G5 S2 U
Lamiaceae Lycopus rubellus Gypsy-wort G5 S1 E
Lamiaceae Monarda clinopodia Basil-balm G5 S1S2 E
Lamiaceae Pycnanthemum clinopodioides Basil Mountain-mint G1G2 S1 E
Lamiaceae Pycnanthemum muticum Blunt Mountain-mint G5 S2S3 T
Lamiaceae Pycnanthemum torrei Torrey's Mountain-mint G2 S1 E
Lamiaceae Pycnanthemum verticillatum var. verticillatum Whorled Mountain-mint G5T5 S1S2 T
Lamiaceae Salvia lyrata Lyre-leaf Sage G5 SH E
Lamiaceae Scutellaria elliptica var. elliptica Hairy Skullcap G5T5 SX U
Lamiaceae Scutellaria incana var. incana Hoary Skullcap G5T5 SH E
Lamiaceae Scutellaria integrifolia Hyssop-skullcap G5 S1 E
Lamiaceae Scutellaria nervosa Veined Skullcap G5 SX U
Lamiaceae Scutellaria serrata Showy Skullcap G4G5 SX U
Lamiaceae Stachys hyssopifolia Rough Hedge-nettle G4G5 S2 T
Lamiaceae Trichostema setaceum Tiny Blue-curls G5 SH E
Lemnaceae Lemna perpusilla Minute Duckweed G5 S1 E
Lemnaceae Lemna valdiviana Pale Duckweed G5 S1 E
Lentibulariaceae Pinguicula vulgaris Butterwort G5 S2 T
Lentibulariaceae Utricularia juncea Rush Bladderwort G5 S1 T
Lentibulariaceae Utricularia radiata Small Floating Bladderwort G4 S2 T
Lentibulariaceae Utricularia striata Fibrous Bladderwort G4G5 S2 T
Liliaceae Aletris farinosa Stargrass G5 S2 T
Liliaceae Allium cernuum var. cernuum Nodding Wild Onion G5T5 S2 T
Liliaceae Allium tricoccum var. burdickii Burdick's Wild Leek G5T4T5 SH E
Liliaceae Amianthium muscaetoxicum Fly-poison G4G5 SX U
Liliaceae Anticlea elegans ssp. glaucus Mountain Death Camas G5T4T5 S2 T
Liliaceae Chamaelirium luteum Fairy Wand G5 S1S2 T
Liliaceae Helonias bullata Swamp Pink G3 SX U
Liliaceae Lilium michiganense Michigan Lily G5 S1 E
Liliaceae Melanthium latifolium Slender Bunchflower G5 SX U
Liliaceae Melanthium virginicum Virginia Bunchflower G5 SH E
Liliaceae Stenanthium leimanthoides Pinebarren Death Camas G4Q SX U
Liliaceae Triantha glutinosa Sticky False Asphodel G4G5 S1 E
Liliaceae Trillium flexipes Nodding Trillium G5 S1 E
Liliaceae Trillium sessile Toad-shade G4G5 S1 E
Liliaceae Uvularia puberula Pine Barren Bellwort G5 S1 E
Linaceae Linum intercursum Sandplain Wild Flax G4 S2 T
Linaceae Linum medium var. texanum Southern Yellow Flax G5T5 S2 T
Linaceae Linum sulcatum Yellow Wild Flax G5 S2 T
Lycopodiaceae Diphasiastrum complanatum Northern Running-pine G5 S1 E
Lycopodiaceae Diphasiastrum sitchense Sitka Clubmoss G5 S1 E
Lycopodiaceae Huperzia selago Fir Clubmoss G5 S1 E
Lycopodiaceae Pseudolycopodiella caroliniana Carolina Clubmoss G4 S1 E
Lycopodiaceae Spinulum canadense Northern Bristly Club-moss G4G5 S1S2 U
Lygodiaceae Lygodium palmatum Climbing Fern G4 S1 E
Lythraceae Lythrum lineare Saltmarsh Loosestrife G5 S1 E
Lythraceae Rotala ramosior Tooth-cup G5 S2 T
Magnoliaceae Magnolia virginiana Sweetbay Magnolia G5 S1 E
Malvaceae Kosteletzkya virginica Seaside Mallow G5 SX U
Melastomataceae Rhexia mariana var. mariana Meadow-beauty G5T5 SX U
Monotropaceae Pterospora andromedea Giant Pine-drops G5 S1 E
Najadaceae Najas guadalupensis ssp. muenscheri Hudson River Water-nymph G5T1 S1 E
Najadaceae Najas guadalupensis ssp. olivacea Southern Water-nymph G5T4? S1 E
Najadaceae Najas marina Spiny Water-nymph G5 S1 E
Onagraceae Epilobium hornemannii ssp. hornemannii Alpine Willow-herb G5T5 S1 E
Onagraceae Ludwigia sphaerocarpa Globe-fruited Ludwigia G5 S2 T
Onagraceae Oenothera laciniata Cut-leaved Evening-primrose G5 S1 E
Onagraceae Oenothera oakesiana Oakes' Evening-primrose G4G5Q S2 T
Ophioglossaceae Botrychium campestre Prairie Dunewort G3G4 SH E
Ophioglossaceae Botrychium lunaria Common Moonwort G5 S1 E
Ophioglossaceae Botrychium minganense Mingan Moonwort G4 S1 E
Ophioglossaceae Botrychium oneidense Blunt-lobe Grape Fern G4 S2S3 E
Ophioglossaceae Botrychium rugulosum Rugulose Grape Fern G3 S1 E
Orchidaceae Amerorchis rotundifolia Round-leaved Orchis G5 SX U
Orchidaceae Aplectrum hyemale Puttyroot G5 S1 E
Orchidaceae Arethusa bulbosa Dragon's Mouth Orchid G4 S2 T
Orchidaceae Calypso bulbosa var. americana Calypso G5T5? SH E
Orchidaceae Corallorhiza striata var. striata Striped Coralroot G5T4T5 S1 E
Orchidaceae Cypripedium arietinum Ram's-head Ladyslipper G3 S2 T
Orchidaceae Cypripedium candidum Small White Ladyslipper G4 S1 E
Orchidaceae Cypripedium parviflorum var. parviflorum Small Yellow Ladyslipper G5T3T5 SH E
Orchidaceae Isotria medeoloides Small Whorled Pogonia G2 SH E
Orchidaceae Liparis liliifolia Large Twayblade G5 S1 E
Orchidaceae Listera auriculata Auricled Twayblade G3G4 S1 E
Orchidaceae Listera australis Southern Twayblade G4 S1S2 E
Orchidaceae Listera convallarioides Broad-lipped Twayblade G5 S1 E
Orchidaceae Malaxis bayardii Bayard's Adder's-mouth Orchid G1G2 S1 E
Orchidaceae Platanthera ciliaris Orange Fringed Orchid G5 S1 E
Orchidaceae Platanthera cristata Crested Fringed Orchis G5 S1 E
Orchidaceae Platanthera hookeri Hooker's Orchid G4 S1 E
Orchidaceae Platanthera leucophaea Eastern Prairie Fringed Orchid G2G3 SH E
Orchidaceae Spiranthes vernalis Spring Ladies'-tresses G5 S1 E
Orchidaceae Tipularia discolor Cranefly Orchid G4G5 S1 E
Orchidaceae Triphora trianthophora Nodding Pogonia G3G4 S2 E
Oxalidaceae Oxalis violacea Violet Wood-sorrel G5 S2S3 T
Pinaceae Pinus echinata Shortleaf Pine G5 S1 U
Pinaceae Pinus virginiana Virginia Pine G5 S1 E
Plantaginaceae Littorella uniflora American Shore-grass G5 S1 E
Plantaginaceae Plantago cordata Heartleaf Plantain G4 S3 T
Plantaginaceae Plantago maritima var. juncoides Seaside Plantain G5T5 S2S3 T
Poaceae Agrostis mertensii Northern Bentgrass G5 S2 T
Poaceae Ammophila breviligulata ssp. champlainensis Champlain Beachgrass G5T2T3Q S1 E
Poaceae Amphicarpum purshii Peanut Grass G4 S1 E
Poaceae Anthoxanthum monticola ssp. monticola Alpine Sweetgrass G5T3T5 S1 E
Poaceae Bouteloua curtipendula var. curtipendula Side-oats Grama G5T5 S1 E
Poaceae Bromus nottowayanus Nottoway Brome Grass G3G5 S1S2 U
Poaceae Calamagrostis perplexa Wood Reedgrass G1 S1 E
Poaceae Calamagrostis porteri ssp. porteri Porter's Reedgrass G4T4 S1S2 U
Poaceae Calamagrostis stricta ssp. inexpansa New England Northern Reedgrass G5T5 S2 T
Poaceae Calamagrostis stricta ssp. stricta Northern Reedgrass G5T5 S1 E
Poaceae Cenchrus tribuloides Dune Sandspur G5 S2 T
Poaceae Chasmanthium laxum Slender Spikegrass G5 S1 E
Poaceae Diarrhena obovata Beakgrass G4G5 S2 E
Poaceae Dichanthelium leibergii Leiberg's Panic Grass G5 S1 E
Poaceae Dichanthelium oligosanthes var. oligosanthes Few-flowered Panic Grass G5T5? S1 E
Poaceae Dichanthelium scabriusculum Rough Panic Grass G4 SH E
Poaceae Dichanthelium scoparium Velvet Panic Grass G5 S1 E
Poaceae Dichanthelium wrightianum Wright's Panic Grass G4 S1S2 E
Poaceae Digitaria filiformis Slender Crabgrass G5 S1 T
Poaceae Elymus glaucus ssp. glaucus Blue Wild Rye G5T5 S1 U
Poaceae Festuca saximontana var. saximontana Sheep Fescue G5T5 S1 E
Poaceae Leptochloa fusca ssp. fascicularis Salt-meadow Grass G5T5 S1 E
Poaceae Muhlenbergia capillaris Long-awn Hairgrass G5 SX U
Poaceae Panicum anceps Panic Grass G5 SX U
Poaceae Panicum rigidulum var. elongatum Tall Flat Panic Grass G5T4T5 SH E
Poaceae Paspalum laeve Field Beadgrass G4G5 S1 E
Poaceae Piptatherum canadense Canada Ricegrass G5 S2 E
Poaceae Poa cuspidata Bluegrass G5 SH E
Poaceae Poa glauca ssp. glauca White Bluegrass G5T5 S1 E
Poaceae Poa interior Inland Bluegrass G5 SH E
Poaceae Poa laxa ssp. fernaldiana Fernald's Bluegrass G5?T3 S1 E
Poaceae Poa paludigena Slender Marsh Bluegrass G3 S1 E
Poaceae Poa sylvestris Woodland Bluegrass G5 S1 E
Poaceae Saccharum giganteum Giant Beardgrass G5 SX U
Poaceae Sphenopholis obtusata Prairie Wedgegrass G5 S1 E
Poaceae Sphenopholis pensylvanica Swamp Oats G4 S1 E
Poaceae Sporobolus clandestinus Rough Rush-grass G5 S1 E
Poaceae Sporobolus heterolepis Northern Dropseed G5 S2 T
Poaceae Tripsacum dactyloides Northern Gamma Grass G5 S2 T
Poaceae Trisetum melicoides Melic-oats G4 S1 E
Poaceae Vahlodea atropurpurea Mountain Hairgrass G5 SX U
Podostemaceae Podostemum ceratophyllum Riverweed G5 S2 T
Polemoniaceae Phlox maculata ssp. maculata Wild Sweet-william G5T4T5 S1 E
Polemoniaceae Phlox pilosa ssp. pilosa Downy Phlox G5T5 SH E
Polemoniaceae Polemonium vanbruntiae Jacob's-ladder G3G4 S3 R
Polygalaceae Polygala incarnata Pink Milkwort G5 SX U
Polygalaceae Polygala lutea Orange Milkwort G5 S1 E
Polygalaceae Polygala mariana Maryland Milkwort G5 SX U
Polygalaceae Polygala nuttallii Nuttall's Milkwort G5 S2 U
Polygonaceae Persicaria careyi Carey's Smartweed G4 S1S2 T
Polygonaceae Persicaria setacea Swamp Smartweed G5 S1S2 E
Polygonaceae Polygonum aviculare ssp. buxiforme Small's Knotweed G5T5 S1 E
Polygonaceae Polygonum douglasii Douglas' Knotweed G5 S2 T
Polygonaceae Polygonum glaucum Seabeach Knotweed G3 S3 R
Polygonaceae Rumex fueginus Golden Dock G4G5 S1 E
Polygonaceae Rumex hastatulus Heart Sorrel G5 SH E
Polygonaceae Rumex persicarioides Seaside Dock G3?Q SH T
Potamogetonaceae Potamogeton alpinus Northern Pondweed G5 S2 T
Potamogetonaceae Potamogeton diversifolius Water-thread Pondweed G5 S1 E
Potamogetonaceae Potamogeton hillii Hill's Pondweed G3 S2 T
Potamogetonaceae Potamogeton ogdenii Ogden's Pondweed G1G2 S1 E
Potamogetonaceae Potamogeton pulcher Spotted Pondweed G5 S2 T
Potamogetonaceae Potamogeton strictifolius Straight-leaf Pondweed G5 S1 E
Potamogetonaceae Stuckenia filiformis ssp. alpina Slender Pondweed G5T5 S1 E
Potamogetonaceae Stuckenia filiformis ssp. occidentalis Sheathed Pondweed G5T5 S1 E
Primulaceae Dodecatheon meadia Shooting-star G5 SX U
Primulaceae Hottonia inflata Featherfoil G4 S2 T
Primulaceae Lysimachia hybrida Lowland Yellow Loosestrife G5 S1 E
Primulaceae Lysimachia quadriflora Four-flowered Loosestrife G5? S1 E
Primulaceae Primula mistassinica Bird's-eye Primrose G5 S2 T
Pteridaceae Cheilanthes lanosa Woolly Lip-fern G5 SH E
Pteridaceae Pellaea glabella ssp. glabella Smooth Cliff Brake G5T5 S2 T
Pyrolaceae Pyrola asarifolia ssp. asarifolia Pink Wintergreen G5T5 S2 T
Pyrolaceae Pyrola minor Snowline Wintergreen G5 S1 E
Ranunculaceae Aconitum noveboracense Northern Monkshood G3 S1 T
Ranunculaceae Anemone multifida var. hudsoniana Cut-leaf Anemone G5T5 SX U
Ranunculaceae Clematis ochroleuca Curly-heads G4 SX U
Ranunculaceae Enemion biternatum False Rue-anemone G5 SX U
Ranunculaceae Hydrastis canadensis Golden-seal G4 S2 T
Ranunculaceae Ranunculus cymbalaria Seaside Crowfoot G5 SH E
Ranunculaceae Ranunculus hispidus var. nitidus Swamp Buttercup G5T5 S1 E
Ranunculaceae Ranunculus pusillus Spearwort G5 SX U
Ranunculaceae Thalictrum venulosum var. confine Veiny Meadow-rue G5T4?Q S1 E
Ranunculaceae Trollius laxus Spreading Globeflower G4T3 S3 R
Rhamnaceae Ceanothus herbaceus Prairie Redroot G5 S1 E
Rosaceae Agrimonia rostellata Woodland Agrimony G5 S2 T
Rosaceae Amelanchier nantucketensis Nantucket Juneberry G3Q S1 E
Rosaceae Argentina egedii ssp. groenlandica Silverweed G5T4T5 S2 T
Rosaceae Crataegus berberifolia Barberry-leaved Hawthorn G4 S1 E
Rosaceae Crataegus mollis Downy Hawthorn G5 S1 E
Rosaceae Crataegus uniflora Dwarf Hawthorn G5 S1 E
Rosaceae Geum macrophyllum var. macrophyllum Bigleaf Yellow Avens G5T5 S1 U
Rosaceae Geum triflorum var. triflorum Prairie-smoke G5T5 S2 T
Rosaceae Geum virginianum Rough Avens G5 S2 E
Rosaceae Porteranthus stipulatus Indian Physic G5 SX U
Rosaceae Potentilla paradoxa Bushy Cinquefoil G5 S1 E
Rosaceae Prunus pumila var. depressa Dwarf Sand-cherry G5T5 S2 T
Rosaceae Prunus pumila var. pumila Low Sand-cherry G5T4 S1 E
Rosaceae Rosa acicularis ssp. sayi Prickly Rose G5T5 S1 E
Rosaceae Rubus chamaemorus Cloudberry G5 SX U
Rosaceae Rubus cuneifolius Sand Blackberry G5 SH E
Rosaceae Spiraea septentrionalis Mountain Meadow-sweet G2G3Q S1 E
Rubiaceae Galium concinnum Shining Bedstraw G5 S1 E
Rubiaceae Galium kamtschaticum Northern Wild-licorice G5 S1 E
Rubiaceae Houstonia purpurea var. calycosa Southern Bluets G5T5 SH E
Rubiaceae Houstonia purpurea var. purpurea Purple Bluets G5T5 SH E
Rubiaceae Oldenlandia uniflora Clustered Bluets G5 S1 E
Rutaceae Ptelea trifoliata ssp. trifoliata Wafer-ash G5T5 S1S2 E
Salicaceae Populus heterophylla Swamp Cottonwood G5 S2 T
Salicaceae Salix cordata Sand Dune Willow G4 S2 E
Salicaceae Salix herbacea Dwarf Willow G5 S1 E
Salicaceae Salix uva-ursi Bearberry Willow G5 S2 T
Santalaceae Geocaulon lividum False Toadflax G5 S1 E
Saxifragaceae Saxifraga aizoides Yellow Mountain-saxifrage G5 S2 T
Saxifragaceae Saxifraga oppositifolia ssp. oppositifolia Purple Mountain-saxifrage G4G5T4T5 S1 E
Saxifragaceae Saxifraga paniculata ssp. neogaea White Mountain-saxifrage G5T5? S1 E
Schizaeaceae Schizaea pusilla Curlygrass Fern G3G4 S1 E
Scrophulariaceae Agalinis acuta Sandplain Gerardia G1 S1 E
Scrophulariaceae Agalinis maritima var. maritima Seaside Gerardia G5T5 S2S3 U
Scrophulariaceae Buchnera americana Blue-hearts G5? SH E
Scrophulariaceae Castilleja coccinea Scarlet Indian-paintbrush G5 S1 E
Scrophulariaceae Collinsia verna Blue-eyed-Mary G5 SH E
Scrophulariaceae Micranthemum micranthemoides Micranthemum GH SX U
Scrophulariaceae Pedicularis lanceolata Swamp Lousewort G5 S2 T
Scrophulariaceae Schwalbea americana Chaffseed G2G3 SX U
Scrophulariaceae Veronicastrum virginicum Culver's-root G4 S2 T
Selaginellaceae Selaginella eclipes Hidden Spike-moss G4 S1 U
Smilacaceae Smilax pseudochina False China-root G4G5 S1 E
Smilacaceae Smilax pulverulenta Downy Carrion-flower G4G5 S1 E
Solanaceae Physalis virginiana var. virginiana Virginia Ground-cherry G5T5 SH E
Sparganiaceae Sparganium natans Small Bur-reed G5 S2 T
Tiliaceae Tilia americana var. heterophylla White Basswood G5T5 SH U
Ulmaceae Ulmus thomasii Cork Elm G5 S2S3 T
Valerianaceae Valeriana uliginosa Marsh Valerian G4Q S1S2 E
Valerianaceae Valerianella chenopodiifolia Goosefoot Corn-salad G5 S1 E
Valerianaceae Valerianella umbilicata Navel-fruited Corn-salad G3G5 SH E
Violaceae Viola bicolor Field Pansy G5 S1 U
Violaceae Viola brittoniana Coast Violet G4G5 S1 E
Violaceae Viola hirsutula Southern Wood Violet G4 SH E
Violaceae Viola nephrophylla Northern Bog Violet G5 S1 E
Violaceae Viola novae-angliae New England Violet G4 S1 E
Violaceae Viola primulifolia Primrose-leaf Violet G5 S2 T
Vitaceae Vitis vulpina Winter Grape G5 S1 E
Vittariaceae Vittaria appalachiana Appalachian Shoestring Fern G4 S1 E
Xyridaceae Xyris smalliana Large Yellow-eyed-grass G5 S2 U

Explanation of Categories

The active and watch lists are produced from the Heritage Program's Biotics 4 Database and include the following categories:

Scientific Name - This is the genus and species name derived from Latin or Greek roots. Some plants also have a variety or subspecies name. These standardized scientific names are understood throughout the world. This list follows the taxonomy of the New York Flora Atlas (Weldy, Troy and David Werier. 2010. New York Flora Atlas <>. [S.M. Landry, K.N. Campbell, and L.D. Mabe (original application development), Florida Center for Community Design and Research <>. University of South Florida <>]. New York Flora Association <>, Albany, New York.

Common Name - This is the most commonly accepted English name for the plant in New York.

Global and State Ranks - These rarity ranks are maintained by NatureServe ( and are used by Natural Heritage programs in every state. They are not linked to any legal penalties but provide information used for determining state and federal legal status of rare plants.

State Status - These status codes reflect rarity, vulnerability and the action priority status of plants. Their status is backed up by state laws that provide penalties for the "taking" of plants.

Explanation of Heritage Ranks and Codes

Each taxon has a global and state rank. The global rank reflects the rarity of the species throughout the world and the state rank reflects the rarity within New York State.

Global Rank

  • G1 = Critically imperiled throughout its range due to extreme rarity (5 or fewer sites or very few remaining individuals) or extremely vulnerable to extinction due to biological factors. (10 taxa in 2010)
  • G2 = Imperiled throughout its range due to rarity (6 - 20 sites or few remaining individuals) or highly vulnerable to extinction due to biological factors. (10 taxa in 2010)
  • G3 = Either very rare and local throughout its range (21 - 100 sites), with a restricted range (but possibly locally abundant), or vulnerable to extinction due to biological factors. (39 taxa in 2010)
  • G4 = Apparently secure throughout its range (but possibly rare in parts).
  • G5 = Demonstrably secure throughout its range (but possibly rare in parts).
  • GH = No extant sites known but it may be rediscovered.
  • GX = Species believed extinct.
  • TU & T? = Status of the subspecies or variety unknown.

State Rank

  • S1 = Critically imperiled in New York State because of extreme rarity (5 or fewer sites or very few remaining individuals) or extremely vulnerable to extirpation from New York State due to biological or human factors.
  • S2 = Imperiled in New York State because of rarity (6 - 20 sites or few remaining individuals) or highly vulnerable to extirpation from New York State due to biological or human factors.
  • S3 = Rare in New York State (usually 21 - 35 extant sites).
  • S4 = Apparently secure in New York State.
  • S5 = Demonstrably secure in New York State.
  • SH = Historical. No existing sites known in New York State in the last 20-30 years but it may be rediscovered.
  • SX = Apparently extirpated from New York State, very low probability of rediscovery.
  • SR = Reported from the state, but existence has not been documented.

Taxon Rank

The T-ranks are defined in the same way as the Global ranks, but the T-rank only refers to the rarity of the subspecific taxon, not the rarity of the species as a whole. If a species has a subspecific name that is the same as the species name it means there is also another subspecies of that species which we do not consider rare in New York or it does not occur in New York.

Double Ranks

The first rank indicates rarity based upon current documentation. The second rank indicates the probable rarity after all historical records and likely habitat have been checked.

Double Ranks Denote Species That Need Additional Field Surveys.

A "Q" indicates a question exists whether or not the taxon is a good taxonomic entity.

A "?" indicates that an identification question exists about known occurrences. It also indicates the rank presumably corresponds to actual occurrences even though the information has not yet been documented in heritage files or historical records. It serves to flag species that need more field studies or specimen identification.

New York State Legal Status

The following categories are defined in regulation 6NYCRR part 193.3 and apply to New York State Environmental Conservation Law section 9-1503. Part (f) of the law reads as follows: "It is a violation for any person, anywhere in the state to pick, pluck, sever, remove, damage by the application of herbicides or defoliants, or carry away, without the consent of the owner, any protected plant. Each protected plant so picked, plucked, severed, removed, damaged or carried away shall constitute a separate violation." Violators of the regulation are subject to fines of $25 per plant illegally taken. For you convenience, the DEC Protected Plant List is included as an appendix within this publication. Questions about DEC's Protected Plant list should be directed to the Division of Lands and Forests at (518) 402-9425.

E = Endangered Species: listed species are those with

  1. 5 or fewer extant sites, or
  2. fewer than 1,000 individuals, or
  3. restricted to fewer than 4 U.S.G.S. 7 1/2 minute topographical maps, or
  4. species listed as endangered by the U. S. Department of Interior, as enumerated in the Code of Federal Regulations 50 CFR 17.11.

T = Threatened: listed species are those with

  1. 6 to fewer than 20 extant sites, or
  2. 1,000 to fewer than 3,000 individuals, or
  3. restricted to not less than 4 or more than 7 U.S.G.S. 7 1/2 minute topographical maps, or
  4. listed as threatened by the U. S. Department of the Interior, as enumerated in the Code of Federal Regulations 50 CFR 17.11.

R = Rare: listed species have

  1. 20 to 35 extant sites, or
  2. 3,000 to 5,000 individuals statewide.

V = Exploitably vulnerable: listed species are likely to become threatened in the near future throughout all or a significant portion of their range within the state if causal factors continue unchecked. [This definition does not apply to many plants on this list and efforts are underway to change the definition or the list - SMY]

U = Unprotected