FAMILY SCIENTIFIC NAME COMMON NAME S RANK Aceraceae Acer ginnala Amur Maple SNA Aceraceae Acer negundo Manitoba Maple S5 Aceraceae Acer negundo var. interius Manitoba Maple S5 Aceraceae Acer negundo var. negundo Manitoba Maple SU Aceraceae Acer negundo var. violaceum Manitoba Maple SU Aceraceae Acer pensylvanicum Striped Maple SNA Aceraceae Acer rubrum Red Maple SNA Aceraceae Acer spicatum Mountain Maple S5 Acoraceae Acorus americanus Sweet Flag S5 Acoraceae Acorus calamus Sweet‐flag SNA Adoxaceae Adoxa moschatellina Moschatel S1 Alismataceae Alisma gramineum Narrow‐leaved Water‐plantain S1 Alismataceae Alisma subcordatum Common Water‐plantain SNA Alismataceae Alisma triviale Common Water‐plantain S5 Alismataceae Sagittaria cuneata Arum‐leaved Arrowhead S5 Alismataceae Sagittaria latifolia Broad‐leaved Arrowhead S4S5 Alismataceae Sagittaria rigida Sessile‐fruited Arrowhead S2 Amaranthaceae Amaranthus albus Tumble Pigweed SNA Amaranthaceae Amaranthus blitoides Prostrate Pigweed SNA Amaranthaceae Amaranthus hybridus Smooth Pigweed SNA Amaranthaceae Amaranthus retroflexus Redroot Pigweed SNA Amaranthaceae Amaranthus spinosus Thorny Amaranth SNA Amaranthaceae Amaranthus tuberculatus Rough‐fruited water‐hemp SU Anacardiaceae Rhus glabra Smooth Sumac S4 Anacardiaceae Toxicodendron rydbergii Poison‐ivy S5 Apiaceae Aegopodium podagraria Goutweed SNA Apiaceae Anethum graveolens Dill SNA Apiaceae Carum carvi Caraway SNA Apiaceae Cicuta bulbifera Bulb‐bearing Water‐hemlock S5 Apiaceae Cicuta maculata Water‐hemlock S5 Apiaceae Cicuta virosa Mackenzie's Water‐hemlock S4 Apiaceae Cryptotaenia canadensis Honewort S2 Apiaceae Cymopterus acaulis Plains Cymopterus S2S3 Apiaceae Cymopterus montanus Mountain Spring‐parsley SNA Apiaceae Daucus carota Wild Carrot SNA Apiaceae Heracleum maximum Cow‐parsnip S5 Apiaceae Lomatium foeniculaceum Hairy‐fruited Parsley S3 Apiaceae Lomatium macrocarpum Long‐fruited Parsley S3 Apiaceae Lomatium orientale White‐flowered Parsley S1 Apiaceae Musineon divaricatum Leafy Musineon S2 Apiaceae Osmorhiza claytonii Wooly or Hairy Sweet Cicely S2 Apiaceae Osmorhiza depauperata Blunt‐fruited Sweet Cicely S2 Apiaceae Osmorhiza longistylis Anise‐root S5 Apiaceae Pastinaca sativa Parsnip SNA Apiaceae Sanicula marilandica Snakeroot S5 Apiaceae Sium suave Water‐parsnip S5 Apiaceae Thaspium barbinode Hairy‐jointed Meadow‐parsnip SNA Apiaceae Zizia aptera Heart‐leaved Alexanders S5 Apiaceae Zizia aurea Golden Alexanders S5 Apocynaceae Apocynum androsaemifolium Spreading Dogbane S5 Apocynaceae Apocynum androsaemifolium ssp. androsaemifolium Speading Dogbane S5 Apocynaceae Apocynum cannabinum Indian‐hemp S4 Araceae Arisaema triphyllum Jack‐in‐the‐pulpit S2 Araceae Arisaema triphyllum ssp. triphyllum Jack‐in‐the‐pulpit S2 Araceae Calla palustris Water‐arum S5 Araceae Symplocarpus foetidus Yellow Skunk Cabbage SNA Araliaceae Aralia hispida Bristly Sarsaparilla S5 Araliaceae Aralia nudicaulis Wild Sarsaparilla S5 Araliaceae Aralia racemosa Spikenard S2 Araliaceae Panax quinquefolius Ginseng SNA Aristolochiaceae Asarum canadense Wild Ginger S3S4 Asclepiadaceae Asclepias incarnata Swamp Milkweed S4 Asclepiadaceae Asclepias incarnata ssp. incarnata Swamp Milkweed S4 Asclepiadaceae Asclepias lanuginosa Hairy Milkweed S2 Asclepiadaceae Asclepias ovalifolia Dwarf Milkweed S4S5 Asclepiadaceae Asclepias speciosa Showy Milkweed S4 Asclepiadaceae Asclepias syriaca Common Milkweed S4 Asclepiadaceae Asclepias verticillata Whorled Milkweed S3 Asclepiadaceae Asclepias viridiflora Green Milkweed S3 Asteraceae Achillea millefolium Common Yarrow S5 Asteraceae Achillea millefolium var. borealis Northern Yarrow S5 Asteraceae Achillea millefolium var. lanulosa Wooly Yarrow S5 Asteraceae Achillea millefolium var. millefolium Common Yarrow SNA Asteraceae Achillea millefolium var. nigrescens Yarrow S5 Asteraceae Achillea ptarmica Sneezeweed SNA Asteraceae Achillea sibirica Many‐flowered Yarrow S5 Asteraceae Acroptilon repens Russian Knapweed SNA Asteraceae Agoseris glauca False Dandelion S5 Asteraceae Agoseris glauca var. agrestis False Dandelion SU Asteraceae Agoseris glauca var. dasycephala False Dandelion S4 Asteraceae Almutaster pauciflorus Few‐flowered Aster S4 Asteraceae Ambrosia acanthicarpa Sandbur S1S2 Asteraceae Ambrosia artemisiifolia Common Ragweed S5 Asteraceae Ambrosia artemisiifolia var. elatior Common Ragweed S5 Asteraceae Ambrosia psilostachya Perennial Ragweed S5 Asteraceae Ambrosia trifida Giant Ragweed S4 Asteraceae Ambrosia trifida var. trifida Giant Ragweed S4 Asteraceae Anaphalis margaritacea Pearly Everlasting S4 Asteraceae Antennaria howellii Howell's pussytoes S4S5 Asteraceae Antennaria howellii ssp. neodioica Common Pussytoes S4 Asteraceae Antennaria microphylla Everlasting S4S5 Asteraceae Antennaria neglecta Field Cat's‐foot S5 Asteraceae Antennaria parlinii Parlin's pussytoes SU Asteraceae Antennaria parlinii ssp. fallax Deceitful pussytoes SU Asteraceae Antennaria parvifolia Small‐leaved Everlasting S4 Asteraceae Antennaria plantaginifolia Plantain‐leaved Everlasting S1S2 Asteraceae Antennaria pulcherrima Showy Everlasting S4 Asteraceae Antennaria rosea Rosy Everlasting SU Asteraceae Antennaria rosea ssp. rosea Rosy Everlasting SU Asteraceae Antennaria umbrinella Brown Pussytoes SNA Asteraceae Anthemis cotula Mayweed SNA Asteraceae Anthemis tinctoria Yellow Chamomille SNA Asteraceae Arctium lappa Great Burdock SNA Asteraceae Arctium minus Common Burdock SNA Asteraceae Arctium tomentosum Wooly Burdock SNA Asteraceae Arctium vulgare Burdock SNA Asteraceae Arnica angustifolia Narrowleaf arnica S4 Asteraceae Arnica angustifolia ssp. angustifolia Narrowleaf arnica S4 Asteraceae Arnica chamissonis Leafy Arnica S4 Asteraceae Arnica chamissonis ssp. foliosa Leafy Arnica S4 Asteraceae Arnica cordifolia Heart‐leaf Arnica S1? Asteraceae Arnica fulgens Shining Arnica S2 Asteraceae Arnica lonchophylla Spear‐leaved Arnica S4 Asteraceae Artemisia abrotanum Southernwood SNA Asteraceae Artemisia absinthium Wormwood SNA Asteraceae Artemisia biennis Biennial Wormwood S5 Asteraceae Artemisia borealis Boreal Wormwood SNR Asteraceae Artemisia campestris Field sagewort S5 Asteraceae Artemisia campestris ssp. canadensis Boreal sage SU Asteraceae Artemisia campestris ssp. caudata Sagewort S4 Asteraceae Artemisia campestris ssp. pacifica Western sagewort S4S5 Asteraceae Artemisia cana Silver Sagebrush S2 Asteraceae Artemisia dracunculus Tarragon S4 Asteraceae Artemisia dracunculus ssp. dracunculus Tarragon S4? Asteraceae Artemisia dracunculus ssp. glauca Tarragon S4 Asteraceae Artemisia frigida Pasture Sage S5 Asteraceae Artemisia furcata Forked Wormwood SNA Asteraceae Artemisia longifolia Long‐leaved Sage S3 Asteraceae Artemisia ludoviciana Prairie Sage S5 Asteraceae Artemisia ludoviciana ssp. ludoviciana Prairie Sage S5 Asteraceae Artemisia pontica Roman Wormwood SNA Asteraceae Artemisia tilesii Herriot's Sage S2 Asteraceae Artemisia tilesii ssp. elatior Herriot's Sage S2 Asteraceae Artemisia vulgaris Mugwort SNA Asteraceae Bidens amplissima Beggar‐ticks SNA Asteraceae Bidens cernua Stick‐tight S5 Asteraceae Bidens frondosa Common Beggarticks S4 Asteraceae Bidens vulgata Beggarticks S4 Asteraceae Boltonia asteroides White Boltonia S2S3 Asteraceae Boltonia asteroides var. recognita White Boltonia S2S3 Asteraceae Canadanthus modestus Large Northern Aster S2 Asteraceae Carduus nutans Nodding or Musk‐thistle SNA Asteraceae Centaurea cyanus Bachelor's‐button SNA Asteraceae Centaurea diffusa Diffuse Knapweed SNA Asteraceae Centaurea solstitialis Yellow Star‐thistle SNA Asteraceae Cichorium intybus Common Chicory SNA Asteraceae Cirsium arvense Canada Thistle SNA Asteraceae Cirsium discolor Field Thistle S1 Asteraceae Cirsium drummondii Short‐stemmed Thistle S4 Asteraceae Cirsium flodmanii Flodman's Thistle S4 Asteraceae Cirsium hillii Hill's Thistle SNA Asteraceae Cirsium muticum Swamp Thistle S4 Asteraceae Cirsium undulatum Pasture Thistle S1? Asteraceae Cirsium vulgare Bull Thistle SNA Asteraceae Conyza canadensis Horse‐weed S5 Asteraceae Coreopsis tinctoria Common Tickseed SH Asteraceae Crepis elegans Youngia S1S2 Asteraceae Crepis runcinata Scapose Hawks‐beard S4 Asteraceae Crepis runcinata ssp. glauca Scapose Hawks‐beard S4 Asteraceae Crepis runcinata ssp. runcinata Scapose Hawks‐beard S4 Asteraceae Crepis tectorum Narrow‐leaved Hawks‐beard SNA Asteraceae Dendranthema arcticum Arctic Daisy S3 Asteraceae Dendranthema arcticum ssp. polare Arctic Daisy S3 Asteraceae Doellingeria umbellata Flat‐topped White Aster S5 Asteraceae Doellingeria umbellata var. pubens Flat‐topped White Aster S5 Asteraceae Dyssodia papposa SNA Asteraceae Echinacea angustifolia Purple Coneflower S3 Asteraceae Echinacea angustifolia var. angustifolia Purple Coneflower S3 Asteraceae Echinops sphaerocephalus Common Globe‐thistle SNA Asteraceae Erigeron acris Northern Daisy Fleabane S5 Asteraceae Erigeron acris ssp. kamtschaticus Northern Daisy Fleabane SU Asteraceae Erigeron acris ssp. politus Northern Daisy Fleabane S4 Asteraceae Erigeron annuus White‐top Fleabane SNA Asteraceae Erigeron asper Rough Fleabane S4S5 Asteraceae Erigeron caespitosus Tufted Fleabane S2 Asteraceae Erigeron elatus Swamp Fleabane S4 Asteraceae Erigeron glabellus Smooth Fleabane S4 Asteraceae Erigeron glabellus var. glabellus Smooth Fleabane S4? Asteraceae Erigeron glabellus var. pubescens Smooth Fleabane S4? Asteraceae Erigeron humilis Purple Fleabane S1 Asteraceae Erigeron hyssopifolius Hyssop‐leaved Fleabane S4 Asteraceae Erigeron hyssopifolius var. hyssopifolius Hyssop‐leaved Fleabane S4 Asteraceae Erigeron lonchophyllus Hirsute Fleabane S4 Asteraceae Erigeron philadelphicus Philadelphia Fleabane S5 Asteraceae Erigeron pumilus Shaggy Fleabane SNA Asteraceae Erigeron strigosus Daisy Fleabane S4S5 Asteraceae Erigeron strigosus var. beyrichii Daisy Fleabane SU Asteraceae Erigeron strigosus var. strigosus Daisy Fleabane S4S5 Asteraceae Eupatorium maculatum Spotted joepyeweed S5 Asteraceae Eupatorium maculatum var. maculatum Joe‐pye‐weed S5 Asteraceae Eupatorium perfoliatum Thoroughwort S4? Asteraceae Eurybia conspicua Showy Aster SU Asteraceae Eurybia macrophylla White Wood Aster S1 Asteraceae Eurybia macrophylla var. 1 White Wood Aster S1 Asteraceae Euthamia graminifolia Flat‐topped Goldenrod S5 Asteraceae Euthamia graminifolia var. graminifolia Flat‐topped goldenrod S4 Asteraceae Euthamia graminifolia var. nuttallii Flat‐topped Goldenrod SU Asteraceae Gaillardia aristata Great‐flowered Gaillardia S4 Asteraceae Gaillardia pulchella Blanket Flower SNA Asteraceae Galinsoga parviflora Quickweed SNA Asteraceae Galinsoga quadriradiata Quickweed SNA Asteraceae Gnaphalium uliginosum Low Cudweed SNA Asteraceae Grindelia squarrosa Curly‐cup Gumweed S5 Asteraceae Grindelia squarrosa var. quasiperennis Curly‐cup Gumweed S5 Asteraceae Grindelia squarrosa var. serrulata Tar Weed S4 Asteraceae Gutierrezia sarothrae Match‐brush S4 Asteraceae Helenium autumnale Common Sneezeweed S4 Asteraceae Helianthus annuus Common Sunflower S4 Asteraceae Helianthus giganteus Large Sunflower SU Asteraceae Helianthus maximiliani Narrow‐leaved Sunflower S5 Asteraceae Helianthus nuttallii Tuberous‐rooted Sunflower S5 Asteraceae Helianthus nuttallii ssp. nuttallii Tuberous‐rooted Sunflower S4S5 Asteraceae Helianthus nuttallii ssp. rydbergii Tuberous‐rooted Sunflower S2 Asteraceae Helianthus pauciflorus Beautiful Sunflower S4 Asteraceae Helianthus pauciflorus ssp. pauciflorus Stiff Sunflower SU Asteraceae Helianthus pauciflorus ssp. subrhomboideus Beautiful Sunflower S4 Asteraceae Helianthus petiolaris Prairie Sunflower S3S4 Asteraceae Helianthus petiolaris ssp. petiolaris Prairie Sunflower S3S4 Asteraceae Helianthus tuberosus Jerusalem Artichoke SNA Asteraceae Helianthus x laetiflorus Beautiful Sunflower SNA Asteraceae Heliopsis helianthoides Ox‐eye S5 Asteraceae Heliopsis helianthoides var. scabra Ox‐eye SU Asteraceae Heterotheca villosa Hairy Golden‐aster S5 Asteraceae Hieracium albiflorum White‐flowered Hawkweed SNA Asteraceae Hieracium aurantiacum Orange Hawkweed SNA Asteraceae Hieracium caespitosum Meadow hawkweed SNA Asteraceae Hieracium canadense Canada Hawkweed S2? Asteraceae Hieracium canadense var. subintegrum Canada Hawkweed S2? Asteraceae Hieracium umbellatum Hawkweed S5 Asteraceae Hieracium venosum Poor Robin's Plantain SNA Asteraceae Inula helenium Elecampane SNA Asteraceae Iva axillaris Poverty‐weed S3S4 Asteraceae Iva xanthifolia Marsh‐elder SU Asteraceae Krigia biflora Cynthia S2 Asteraceae Lactuca biennis Tall Blue Lettuce S4 Asteraceae Lactuca canadensis Tall Yellow Lettuce S4 Asteraceae Lactuca canadensis var. longifolia Tall Yellow Lettuce S4 Asteraceae Lactuca floridana Woodland Lettuce SH Asteraceae Lactuca hirsuta Hairy Lettuce SNA Asteraceae Lactuca ludoviciana Western Lettuce SU Asteraceae Lactuca serriola Prickly Lettuce SNA Asteraceae Lactuca tatarica Wild Lettuce S5 Asteraceae Lactuca tatarica var. pulchella SNR Asteraceae Lactuca virosa Bitter Lettuce SNA Asteraceae Lapsana communis Nipplewort SNA Asteraceae Leucanthemum vulgare Ox‐eye Daisy SNA Asteraceae Liatris ligulistylis Meadow Blazingstar S4 Asteraceae Liatris punctata Dotted Blazingstar S4 Asteraceae Lygodesmia juncea Skeletonweed S4 Asteraceae Machaeranthera pinnatifida Iron Plant S3S4 Asteraceae Madia glomerata Tarweed SU Asteraceae Matricaria discoidea Pineapple Weed S5 Asteraceae Matricaria recutita Wild Chamomile SNA Asteraceae Megalodonta beckii Water‐marigold S3 Asteraceae Megalodonta beckii var. beckii Water‐marigold S3 Asteraceae Nothocalais cuspidata Prairie False Dandelion S1 Asteraceae Packera aurea Golden Ragwort S5 Asteraceae Packera cana Silvery Groundsel S4 Asteraceae Packera indecora Rayless Ragwort SU Asteraceae Packera paupercula Balsam Groundsel S5 Asteraceae Packera plattensis Prairie Ragwort SU Asteraceae Packera pseudaurea Groundsel SU Asteraceae Packera tridenticulata Compact Groundsel S3 Asteraceae Petasites frigidus Arctic butterbur S5 Asteraceae Petasites frigidus var. palmatus Palmate‐leaved Colt's‐foot S5 Asteraceae Petasites frigidus var. sagittatus Arrow‐leaved Colt's‐foot S5 Asteraceae Petasites frigidus var. x vitifolius Vine‐leaved Colt's‐foot SNA Asteraceae Prenanthes alata Western Rattlesnake‐root SNA Asteraceae Prenanthes alba White Lettuce S4S5 Asteraceae Prenanthes altissima Tall Rattlesnake‐root SNA Asteraceae Prenanthes racemosa Glaucous White Lettuce S4 Asteraceae Pyrrocoma lanceolata Lance‐leaf goldenweed SNA Asteraceae Pyrrocoma lanceolata var. lanceolata Golden‐weed SNA Asteraceae Ratibida columnifera Long‐headed Coneflower S4 Asteraceae Rudbeckia hirta Black‐eyed Susan S5 Asteraceae Rudbeckia laciniata Tall Coneflower S4 Asteraceae Senecio congestus Marsh‐fleabane S5 Asteraceae Senecio eremophilus Cut‐leaved Ragwort S4 Asteraceae Senecio integerrimus Entire‐leaved Groundsel S4 Asteraceae Senecio viscosus Sticky Groundsel SNA Asteraceae Senecio vulgaris Common Groundsel SNA Asteraceae Shinnersoseris rostrata Annual Skeletonweed S1S2 Asteraceae Silphium terebinthinaceum Prairie‐dock SNA Asteraceae Silphium terebinthinaceum var. terebinthinaceum Prairie‐dock SNA Asteraceae Solidago altissima SU Asteraceae Solidago altissima ssp. altissima SU Asteraceae Solidago altissima ssp. gilvocanescens Great Plains late goldenrod SU Asteraceae Solidago bicolor White Goldenrod SNA Asteraceae Solidago canadensis Canada Goldenrod S5 Asteraceae Solidago gigantea Late Goldenrod S5 Asteraceae Solidago hispida Hairy Goldenrod S5 Asteraceae Solidago hispida var. hispida Hairy Goldenrod S5 Asteraceae Solidago hispida var. lanata Hairy Goldenrod S4? Asteraceae Solidago juncea Sharp‐toothed Goldenrod S2 Asteraceae Solidago lepida Western Canada goldenrod S4 Asteraceae Solidago missouriensis Low Goldenrod S5 Asteraceae Solidago mollis Velvety Goldenrod S3 Asteraceae Solidago multiradiata Alpine Goldenrod S5 Asteraceae Solidago nemoralis Showy Goldenrod S5 Asteraceae Solidago nemoralis ssp. decemflora Showy Goldenrod S5 Asteraceae Solidago nemoralis ssp. nemoralis Showy Goldenrod SU Asteraceae Solidago ptarmicoides White Upland Aster S4 Asteraceae Solidago riddellii Riddell's Goldenrod S2 Asteraceae Solidago rigida Stiff Goldenrod S5 Asteraceae Solidago rigida ssp. humilis Stiff Goldenrod S5 Asteraceae Solidago rugosa Rough‐leaved Goldenrod SNA Asteraceae Solidago simplex Sticky goldenrod SU Asteraceae Solidago simplex var. simplex Sticky goldenrod SU Asteraceae Solidago uliginosa Bog Goldenrod S3 Asteraceae Solidago uliginosa var. linoides Bog goldenrod S3 Asteraceae Solidago x lutescens Upland Aster SNA Asteraceae Sonchus arvensis Field Sow‐thistle SNA Asteraceae Sonchus asper Spiny‐leaved Sow‐thistle SNA Asteraceae Sonchus oleraceus Common Sow‐thistle SNA Asteraceae Stenotus armerioides Skyline Golden‐weed SNA Asteraceae Symphyotrichum boreale Northern Borealis S5 Asteraceae Symphyotrichum ciliatum Alkali American‐aster SU Asteraceae Symphyotrichum ciliolatum Lindley's Aster S5 Asteraceae Symphyotrichum ciliolatum var. 1 Lindley's Aster S5 Asteraceae Symphyotrichum cordifolium Common Blue Wood Aster SNA Asteraceae Symphyotrichum ericoides Heath or Many‐flowered Aster S4 Asteraceae Symphyotrichum ericoides var. ericoides White heath aster S3? Asteraceae Symphyotrichum ericoides var. pansum White heath aster S4 Asteraceae Symphyotrichum falcatum White prairie aster S4S5 Asteraceae Symphyotrichum falcatum var. commutatum Heath Aster S4S5 Asteraceae Symphyotrichum laeve Smooth Aster S5 Asteraceae Symphyotrichum lanceolatum Panicles Aster S5 Asteraceae Symphyotrichum lanceolatum var. hesperium willow aster S4 Asteraceae Symphyotrichum lanceolatum var. lanceolatum Lance‐leaved aster S5 Asteraceae Symphyotrichum lateriflorum Calico or Wood Aster S4 Asteraceae Symphyotrichum laurentianum Aster SNA Asteraceae Symphyotrichum novae‐angliae New England Aster S4 Asteraceae Symphyotrichum novi‐belgii Long‐leaved Aster SNA Asteraceae Symphyotrichum novi‐belgii var. 1An Aster SNA Asteraceae Symphyotrichum praealtum Aster SNA Asteraceae Symphyotrichum puniceum Purple‐stemmed Aster S5 Asteraceae Symphyotrichum puniceum var. puniceum Purple‐stemmed Aster S5 Asteraceae Symphyotrichum robynsianum Robyns's Aster SU Asteraceae Symphyotrichum sericeum Western Silvery Aster S2S3 Asteraceae Tanacetum bipinnatum Tansy S3 Asteraceae Tanacetum bipinnatum ssp. huronense Lake Huron tansy S3 Asteraceae Tanacetum parthenium Feverfew SNA Asteraceae Tanacetum vulgare Common Tansy SNA Asteraceae Taraxacum ceratophorum Dandelion S4S5 Asteraceae Taraxacum laevigatum Red‐seeded Dandelion SNA Asteraceae Taraxacum officinale Common Dandelion SNA Asteraceae Townsendia exscapa Silky Townsend‐daisy S2 Asteraceae Tragopogon dubius Goat's‐beard SNA Asteraceae Tragopogon porrifolius Salsify SNA Asteraceae Tragopogon pratensis Goat's‐beard SNA Asteraceae Tripleurospermum maritimum False mayweed S3 Asteraceae Tripleurospermum maritimum ssp. phaeocephalum Chamomile S3 Asteraceae Tripleurospermum perforata Scentless Mayweed SNA Asteraceae Vernonia fasciculata Western Ironweed S1 Asteraceae Vernonia fasciculata ssp. corymbosa Western Ironweed S1 Asteraceae Xanthium strumarium Cocklebur S4 Asteraceae Xanthium strumarium var. canadense Cocklebur S4 Asteraceae Xanthium strumarium var. glabratum Cocklebur SNA Balsaminaceae Impatiens capensis Spotted Touch‐me‐not S5 Balsaminaceae Impatiens glandulifera Large Touch‐me‐not SNA Balsaminaceae Impatiens noli‐tangere Western Jewelweed S2 Balsaminaceae Impatiens pallida Pale Touch‐me‐not SNA Berberidaceae Berberis vulgaris Common Barberry SNA Berberidaceae Caulophyllum thalictroides Papoose‐root S2 Betulaceae Alnus incana Specled Alder S5 Betulaceae Alnus incana ssp. rugosa Speckled Alder S5 Betulaceae Alnus incana ssp. tenuifolia Speckled Alder SNA Betulaceae Alnus viridis Green Alder S5 Betulaceae Alnus viridis ssp. crispa Green or Mountain Alder S5 Betulaceae Betula cordifolia White Birch SNA Betulaceae Betula glandulosa Dwarf Birch S5 Betulaceae Betula nana arctic dwarf birch SNA Betulaceae Betula neoalaskana Alaskan Birch S5 Betulaceae Betula occidentalis River Birch S4S5 Betulaceae Betula papyrifera White Birch S5 Betulaceae Betula pendula European Birch SNA Betulaceae Betula pumila Dwarf Birch S5 Betulaceae Betula pumila var. glandulifera Dwarf Birch S5 Betulaceae Corylus americana American Hazelnut S4 Betulaceae Corylus cornuta Beaked Hazelnut S5 Betulaceae Corylus cornuta ssp. cornuta Beaked Hazelnut S5 Betulaceae Ostrya virginiana Hop‐hornbeam S2 Boraginaceae Amsinckia menziesii Fiddle‐neck SNA Boraginaceae Amsinckia tessellata Tessellate Fiddle‐neck SNA Boraginaceae Anchusa arvensis Small Bugloss SNA Boraginaceae Asperugo procumbens Madwort SNA Boraginaceae Borago officinalis Borage SNA Boraginaceae Buglossoides arvensis Corn‐gromwell SNA Boraginaceae Cryptantha nubigena Crater Lake Cat's‐eye SNA Boraginaceae Cynoglossum officinale Common Hound's Tongue SNA Boraginaceae Cynoglossum virginianum Northern wild comfrey S3 Boraginaceae Cynoglossum virginianum var. boreale Northern Wild Comfrey S3 Boraginaceae Echium plantagineum Purple Viper's Bugloss SNA Boraginaceae Echium vulgare Blueweed SNA Boraginaceae Hackelia deflexa Beggar's Lice S5 Boraginaceae Hackelia deflexa var. americana Beggar's Lice S5 Boraginaceae Hackelia floribunda Large Flowered Stickseed SU Boraginaceae Heliotropium curassavicum Seaside Heliotrope SH Boraginaceae Heliotropium curassavicum var. obovatum Seaside Heliotrope SH Boraginaceae Lappula occidentalis Flat‐spine Sheepburr S4 Boraginaceae Lappula occidentalis var. occidentalis Flat‐spine Sheepburr S4 Boraginaceae Lappula squarrosa Bristly Stickseed SNA Boraginaceae Lithospermum canescens Hoary Puccoon S5 Boraginaceae Lithospermum incisum Narrow‐leaved Puccoon S3 Boraginaceae Lithospermum officinale Common Gromwell SNA Boraginaceae Mertensia lanceolata Tall Lungwort S2 Boraginaceae Mertensia maritima Gray Oysterleaf S2 Boraginaceae Mertensia paniculata Tall Lungwort S5 Boraginaceae Myosotis arvensis Field Forget‐me‐not SNA Boraginaceae Myosotis scorpioides Marsh Forget‐me‐not SNA Boraginaceae Onosmodium molle Marble‐seed S3S4 Boraginaceae Onosmodium molle ssp. hispidissimum Marble‐seed SU Boraginaceae Onosmodium molle ssp. occidentale Marble‐seed SU Boraginaceae Plagiobothrys scouleri Scouler's Allocarya S1 Boraginaceae Plagiobothrys scouleri var. scouleri Scouler's Allocarya S1 Boraginaceae Symphytum asperum Rough Comfrey SNA Boraginaceae Symphytum officinale Common Comfrey SNA Brassicaceae Alyssum alyssoides Small Allysum SNA Brassicaceae Alyssum desertorum Yellow Alyssum SNA Brassicaceae Arabidopsis salsuginea Saltwater Cress SU Brassicaceae Arabis alpina Alpine Rock‐grass S2 Brassicaceae Arabis arenicola Arctic Rock Cress S3 Brassicaceae Arabis arenicola var. arenicola Arctic Rock Cress SU Brassicaceae Arabis arenicola var. pubescens Arctic Rock Cress SU Brassicaceae Arabis divaricarpa Purple Rock Cress S5 Brassicaceae Arabis drummondii Drummond's Rock Cress S5 Brassicaceae Arabis glabra Tower Mustard SNA Brassicaceae Arabis hirsuta Hirsute Rock Cress S5 Brassicaceae Arabis hirsuta var. pycnocarpa Hirsute Rock Cress S5 Brassicaceae Arabis holboellii Holboell's Rock Cress S5 Brassicaceae Arabis holboellii var. collinsii Hollboel's Rock Cress S5 Brassicaceae Arabis holboellii var. retrofracta Holboell's Rock Cress S5 Brassicaceae Arabis lyrata Lyre‐leaved Rock Cress S2? Brassicaceae Arabis lyrata var. lyrata Lyre‐leaved Rock Cress S2? Brassicaceae Arabis nuttallii Nuttall Rock‐cress SNA Brassicaceae Armoracia rusticana Horse Radish SNA Brassicaceae Barbarea orthoceras Winter Cress S4 Brassicaceae Barbarea vulgaris Yellow‐rocket SNA Brassicaceae Berteroa incana Hoary Alyssum SNA Brassicaceae Brassica juncea Chinese or Leaf Mustard SNA Brassicaceae Brassica napus Turnip SNA Brassicaceae Brassica nigra Black Mustard SNA Brassicaceae Brassica rapa Bird's Rape SNA Brassicaceae Braya humilis Low Braya S2 Brassicaceae Braya humilis ssp. humilis Low Braya SNR Brassicaceae Cakile edentula American Sea‐rocket SNA Brassicaceae Camelina microcarpa Small‐seeded False Flax SNA Brassicaceae Camelina sativa False Flax SNA Brassicaceae Capsella bursa‐pastoris Shepherd's Purse SNA Brassicaceae Cardamine bulbosa Spring Cress SH Brassicaceae Cardamine douglassii Purple Cress SNA Brassicaceae Cardamine parviflora Small Bitter Cress S4 Brassicaceae Cardamine parviflora var. arenicola Small Bitter Cress S4 Brassicaceae Cardamine pensylvanica Bitter Cress S5 Brassicaceae Cardamine pratensis Cuckoo‐flower S4S5 Brassicaceae Cardamine pratensis var. angustifolia Cucko‐flower S4S5 Brassicaceae Cardaria draba Hoary Cress SNA Brassicaceae Cardaria pubescens Hoary Cress SNA Brassicaceae Cochlearia officinalis Scurvy‐grass S2S3 Brassicaceae Conringia orientalis Hare's‐ear Mustard SNA Brassicaceae Descurainia incana Gray Tansy Mustard S5 Brassicaceae Descurainia pinnata Tansy Mustard S4 Brassicaceae Descurainia pinnata ssp. brachycarpa Tansy Mustard S4 Brassicaceae Descurainia sophia Flixweed SNA Brassicaceae Descurainia sophioides Northern Flixweed S2 Brassicaceae Diplotaxis muralis Wall‐rocket SNA Brassicaceae Draba alpina Alpine Whitlow‐grass S2S3 Brassicaceae Draba aurea Golden Whitlow‐grass S1S2 Brassicaceae Draba cana Hoary Whitlow‐grass SNR Brassicaceae Draba cinerea Whitlow‐grass SNR Brassicaceae Draba glabella Whitlow‐grass S3? Brassicaceae Draba glabella var. glabella SNR Brassicaceae Draba incana Whitlow‐grass S2? Brassicaceae Draba incana var. confusa Whitlow‐grass S2? Brassicaceae Draba lactea Milky Whitlow‐grass S2? Brassicaceae Draba nemorosa Yellow Whitlow‐grass S5 Brassicaceae Draba nemorosa var. leiocarpa Yellow Whitlow‐grass S5 Brassicaceae Draba nivalis Yellow Arctic Whitlow‐grass S1 Brassicaceae Draba reptans Creeping Whitlow‐grass SU Brassicaceae Eruca vesicaria garden‐rocket SNA Brassicaceae Erucastrum gallicum Dog‐mustard SNA Brassicaceae Erysimum asperum S4? Brassicaceae Erysimum capitatum western wallflower SU Brassicaceae Erysimum cheiranthoides Wormseed Mustard SNA Brassicaceae Erysimum inconspicuum Small‐flowered Prairie‐rocket S4 Brassicaceae Erysimum inconspicuum var. inconspicuum Small‐flowered Prairie‐rocket S4 Brassicaceae Eutrema edwardsii Edward's Mock Wallflower S1 Brassicaceae Hesperis matronalis Dame's‐violet SNA Brassicaceae Hutchinsia procumbens Prostrate Hutchinsia S1 Brassicaceae Iodanthus pinnatifidus Purple‐rocket SNA Brassicaceae Lepidium densiflorum Common Pepper‐grass S5 Brassicaceae Lepidium latifolium Broad‐leaf Pepper‐grass SNA Brassicaceae Lepidium ramosissimum Bourgeau's Pepper‐grass S5? Brassicaceae Lepidium ramosissimum var. bourgeauanum Bourgeau's Pepper‐grass SU Brassicaceae Lepidium ramosissimum var. ramosissimum S5? Brassicaceae Lepidium ruderale Roadside Pepper‐grass SNA Brassicaceae Lepidium sativum Garden Cress SNA Brassicaceae Lesquerella arctica Northern Bladderpod S2 Brassicaceae Lesquerella ludoviciana Sand Bladderpod S4 Brassicaceae Lunaria annua Honesty SNA Brassicaceae Neslia paniculata Ball Mustard SNA Brassicaceae Raphanus sativus Radish SNA Brassicaceae Rorippa austriaca Austrian Field Cress SNA Brassicaceae Rorippa microphylla One‐row Water‐cress SNA Brassicaceae Rorippa nasturtium‐aquaticum True Watercress SNA Brassicaceae Rorippa palustris Bog Yellowcress S5 Brassicaceae Rorippa palustris ssp. fernaldiana Marsh Yellow Cress S5 Brassicaceae Rorippa palustris ssp. hispida Marsh Yellow Cress S5 Brassicaceae Rorippa palustris ssp. palustris SNR Brassicaceae Rorippa sinuata Spreading Yellow‐cress SNA Brassicaceae Rorippa sylvestris Creeping Yellow Cress SNA Brassicaceae Sinapis alba White Mustard SNA Brassicaceae Sinapis arvensis Charlock SNA Brassicaceae Sisymbrium altissimum Tumbling Mustard SNA Brassicaceae Sisymbrium loeselii Tall Hedge Mustard SNA Brassicaceae Sisymbrium officinale Hedge Mustard SNA Brassicaceae Subularia aquatica Water Awl‐wort S2? Brassicaceae Subularia aquatica var. americana Water Awl‐wort S2? Brassicaceae Thlaspi arvense Field Pennycress SNA Butomaceae Butomus umbellatus Flowering Rush SNA Cabombaceae Brasenia schreberi Water‐shield S2 Cactaceae Coryphantha vivipara Pincushion Cactus S2 Cactaceae Opuntia fragilis Brittle Prickly‐pear S4 Cactaceae Opuntia polyacantha Panhandle Prickly‐pear SNA Callitrichaceae Callitriche hermaphroditica Northern Water‐starwort S5 Callitrichaceae Callitriche heterophylla Larger Water‐starwort S2 Callitrichaceae Callitriche heterophylla ssp. heterophylla Northern Water‐starwort SU Callitrichaceae Callitriche palustris Vernal Water‐starwort S5 Campanulaceae Campanula aparinoides Marsh Bellflower S5 Campanulaceae Campanula glomerata Clustered Bellflower SNA Campanulaceae Campanula rapunculoides Creeping Bluebell SNA Campanulaceae Campanula rotundifolia Bluebell S5 Campanulaceae Campanula trachelium Bats‐in‐the‐belfry SNA Campanulaceae Campanula uniflora Alpine Bluebell S1 Campanulaceae Lobelia cardinalis Cardinal Flower SH Campanulaceae Lobelia dortmanna Water Lobelia S2 Campanulaceae Lobelia kalmii Kalm's Lobelia S5 Campanulaceae Lobelia siphilitica Great Lobelia SH Campanulaceae Lobelia siphilitica var. ludoviciana Great Lobelia SH Campanulaceae Lobelia spicata Pale‐spike Lobelia S4 Campanulaceae Lobelia spicata var. campanulata Pale‐spike Lobelia SH Campanulaceae Lobelia spicata var. hirtella Pale‐spike Lobelia S4 Cannabaceae Cannabis sativa Hemp SNA Cannabaceae Humulus lupulus Common Hop S4 Cannabaceae Humulus lupulus var. lupuloides Common Hop S4 Cannabaceae Humulus lupulus var. lupulus Common Hop SNA Cannabaceae Humulus lupulus var. neomexicanus Common Hop S3 Capparaceae Cleome serrulata Spiderflower S3 Capparaceae Polanisia dodecandra Clammyweed S1 Capparaceae Polanisia dodecandra ssp. dodecandra Clammyweed S1 Capparaceae Polanisia dodecandra ssp. trachysperma Clammyweed S1 Caprifoliaceae Diervilla lonicera Bush‐honeysuckle S5 Caprifoliaceae Linnaea borealis Twinflower S5 Caprifoliaceae Linnaea borealis ssp. longiflora Twinflower S5 Caprifoliaceae Lonicera canadensis American Fly‐honeysuckle S1 Caprifoliaceae Lonicera dioica Limber or Twining Honeysuckle S5 Caprifoliaceae Lonicera dioica var. glaucescens Twining Honeysuckle S5 Caprifoliaceae Lonicera hirsuta Hairy Honeysuckle SNA Caprifoliaceae Lonicera involucrata Black Twinberry S4 Caprifoliaceae Lonicera involucrata var. involucrata SNR Caprifoliaceae Lonicera oblongifolia Swamp‐fly‐honeysuckle S4 Caprifoliaceae Lonicera tatarica Tartarian Honeysuckle SNA Caprifoliaceae Lonicera villosa Mountain‐fly‐honeysuckle S5 Caprifoliaceae Lonicera villosa var. solonis Mountain‐fly‐honeysuckle S5 Caprifoliaceae Sambucus racemosa Red Elderberry S4 Caprifoliaceae Sambucus racemosa var. racemosa Red Elderberry S4 Caprifoliaceae Symphoricarpos albus Snowberry S5 Caprifoliaceae Symphoricarpos occidentalis Western Snowberry S5 Caprifoliaceae Viburnum edule Mooseberry S5 Caprifoliaceae Viburnum lentago Nannyberry S4 Caprifoliaceae Viburnum opulus Highbush‐cranberry S5 Caprifoliaceae Viburnum opulus var. americanum Highbush‐cranberry S5 Caprifoliaceae Viburnum rafinesquianum Downy Arrow‐wood S4 Caryophyllaceae Agrostemma githago Purple Cockle SNA Caryophyllaceae Arenaria humifusa Sandwort S2? Caryophyllaceae Arenaria serpyllifolia Thyme‐leaved Sandwort SNA Caryophyllaceae Cerastium alpinum Alpine Chickweed S2 Caryophyllaceae Cerastium alpinum ssp. alpinum Alpine Mouse‐ear Chickweed S2 Caryophyllaceae Cerastium alpinum ssp. lanatum SNR Caryophyllaceae Cerastium arvense Field Chickweed S5 Caryophyllaceae Cerastium arvense ssp. strictum Field Chickweed S5 Caryophyllaceae Cerastium beeringianum Bering Mouse‐ear Chickweed SNR Caryophyllaceae Cerastium brachypodum Short‐stalked Mouse‐ear Chickweed SNA Caryophyllaceae Cerastium fontanum Common Mouse‐ear Chickweed SNA Caryophyllaceae Cerastium fontanum ssp. vulgare Common Mouse‐ear Chickweed SNA Caryophyllaceae Cerastium nigrescens SNA Caryophyllaceae Cerastium nigrescens ssp. arcticum SNA Caryophyllaceae Cerastium nutans Long‐stalked Chickweed S5 Caryophyllaceae Cerastium tomentosum Dusty Miller SNA Caryophyllaceae Dianthus barbatus Sweet William SNA Caryophyllaceae Dianthus deltoides Maiden‐pink SNA Caryophyllaceae Dianthus plumarius Cottage Pink SNA Caryophyllaceae Dianthus sylvestris Wood Pink SNA Caryophyllaceae Gypsophila paniculata Baby's‐breath SNA Caryophyllaceae Honckenya peploides Seabeach Sandwort S2 Caryophyllaceae Minuartia dawsonensis Sandwort S5 Caryophyllaceae Minuartia rossii Ross Stitchwort SU Caryophyllaceae Minuartia rubella Sandwort S2 Caryophyllaceae Minuartia stricta Bog Stitchwort SU Caryophyllaceae Moehringia lateriflora Grove Sandwort S5 Caryophyllaceae Moehringia macrophylla Large‐leaved Sandwort S1S2 Caryophyllaceae Paronychia sessiliflora Low Nailwort SNA Caryophyllaceae Sagina caespitosa Tufted Pearlwort S2 Caryophyllaceae Sagina nivalis Pearlwort SNA Caryophyllaceae Sagina nodosa Pearlwort S4 Caryophyllaceae Sagina nodosa ssp. borealis Pearlwort SU Caryophyllaceae Sagina nodosa ssp. nodosa Pearlwort S4 Caryophyllaceae Saponaria officinalis Bouncing Bet SNA Caryophyllaceae Silene acaulis Moss Champion SNA Caryophyllaceae Silene antirrhina Sleepy Catchfly S5 Caryophyllaceae Silene chalcedonica Maltese‐cross SNA Caryophyllaceae Silene csereii Smooth Catchfly SNA Caryophyllaceae Silene drummondii Drummond's Cockle S3 Caryophyllaceae Silene drummondii var. drummondii Drummond's Cockle S3 Caryophyllaceae Silene involucrata Mountain Cockle S2 Caryophyllaceae Silene latifolia White Cockle SNA Caryophyllaceae Silene latifolia ssp. alba White Cockle SNA Caryophyllaceae Silene menziesii Menzies Catchfly SU Caryophyllaceae Silene noctiflora Night‐flowering Catchfly SNA Caryophyllaceae Silene uralensis Nodding Cockle S2 Caryophyllaceae Silene uralensis ssp. uralensis SNR Caryophyllaceae Silene vulgaris Bladder campion SNA Caryophyllaceae Spergularia canadensis SNR Caryophyllaceae Spergularia canadensis var. canadensis SNR Caryophyllaceae Spergularia salina Sand Spurrey S4 Caryophyllaceae Spergularia salina var. salina Salt‐marsh Sand‐spurrey S4 Caryophyllaceae Stellaria borealis Boreal Starwort SU Caryophyllaceae Stellaria borealis ssp. borealis Boreal Starwort SU Caryophyllaceae Stellaria crassifolia Fleshy Stitchwort S4 Caryophyllaceae Stellaria graminea Common Stitchwort SNA Caryophyllaceae Stellaria humifusa Stitchwort S2S3 Caryophyllaceae Stellaria longifolia Long‐leaved Stitchwort S5 Caryophyllaceae Stellaria longipes Long‐stalked Stitchwort S5 Caryophyllaceae Stellaria media Common Chickweed SNA Caryophyllaceae Vaccaria hispanica Cow‐cockle SNA Celastraceae Celastrus scandens Climbing Bittersweet S4 Ceratophyllaceae Ceratophyllum demersum Common Hornwort S5 Ceratophyllaceae Ceratophyllum echinatum Hornwort S1 Chenopodiaceae Atriplex argentea Saltbrush S2 Chenopodiaceae Atriplex dioica Thickleaf Orach S2 Chenopodiaceae Atriplex gardneri Gardner's Saltbrush S1 Chenopodiaceae Atriplex glabriuscula Orach SU Chenopodiaceae Atriplex heterosperma Russian atriplex SNA Chenopodiaceae Atriplex hortensis Garden Orach SNA Chenopodiaceae Atriplex littoralis Tropical Saltbush SNA Chenopodiaceae Atriplex patula Spearscale SNA Chenopodiaceae Atriplex prostrata Thinleaf Orach SNA Chenopodiaceae Axyris amaranthoides Russian Pigweed SNA Chenopodiaceae Chenopodium album Lamb's‐quarters SNA Chenopodiaceae Chenopodium berlandieri Pitseed Goosefoot S4 Chenopodiaceae Chenopodium capitatum Strawberry Blite S5 Chenopodiaceae Chenopodium desiccatum Narrow‐leaf Goosefoot SU Chenopodiaceae Chenopodium fremontii Fremont's Goosefoot S4 Chenopodiaceae Chenopodium glaucum SNA Chenopodiaceae Chenopodium glaucum var. glaucum Oak‐leaf Goosefoot SNA Chenopodiaceae Chenopodium glaucum var. salinum Oak‐leaved Goosefoot SNA Chenopodiaceae Chenopodium leptophyllum Narrow‐leaved Goosefoot SU Chenopodiaceae Chenopodium polyspermum Many‐seeded Goosefoot SNA Chenopodiaceae Chenopodium pratericola Goosefoot SU Chenopodiaceae Chenopodium rubrum Coast‐blite S4 Chenopodiaceae Chenopodium simplex maple‐leaved goosefoot S5 Chenopodiaceae Chenopodium strictum Strict Goosefoot SNA Chenopodiaceae Chenopodium subglabrum Smooth Goosefoot S1 Chenopodiaceae Corispermum americanum American Bugseed S2S3 Chenopodiaceae Corispermum americanum var. americanum American Bugseed S2S3 Chenopodiaceae Corispermum hookeri Hooker's Bugseed S1 Chenopodiaceae Corispermum hookeri var. hookeri Hooker's Bugseed S1 Chenopodiaceae Corispermum pallasii Pallas' Bugseed SU Chenopodiaceae Corispermum villosum Hairy Bugseed S1S2 Chenopodiaceae Cycloloma atriplicifolium Winged Pigseed S2 Chenopodiaceae Kochia scoparia Summer Cypress SNA Chenopodiaceae Krascheninnikovia lanata Winterfat S2 Chenopodiaceae Monolepis nuttalliana Poverty‐weed S5 Chenopodiaceae Salicornia borealis Arctic Glasswort S1 Chenopodiaceae Salicornia rubra Slender Glasswort S4 Chenopodiaceae Salsola tragus Russian Thistle SNA Chenopodiaceae Spinacia oleracea Spinach SNA Chenopodiaceae Suaeda calceoliformis Horned Sea‐blite S5 Chenopodiaceae Suaeda maritima Sea‐blite SU Cistaceae Helianthemum bicknellii Frostweed S3? Cistaceae Hudsonia tomentosa False Heather S3 Cistaceae Hudsonia tomentosa var. tomentosa False Heather S3 Cistaceae Lechea intermedia Pinweed S1 Cistaceae Lechea intermedia var. depauperata Pinweed S1 Clusiaceae Hypericum ascyron Greater St. John's‐wort SNA Clusiaceae Hypericum canadense Canada St. John's‐wort SNA Clusiaceae Hypericum ellipticum Pale St. John's‐wort SNA Clusiaceae Hypericum majus Large Canada St. John's‐wort S4 Clusiaceae Hypericum mutilum Small‐flowered St. John's‐wort SNA Clusiaceae Hypericum perforatum Common St. John's‐wort SNA Clusiaceae Triadenum fraseri Marsh St. John's‐wort S3? Commelinaceae Tradescantia occidentalis Western Spiderwort S1 Convolvulaceae Calystegia sepium Hedge Bindweed S4 Convolvulaceae Calystegia sepium ssp. americana American Bindweed SU Convolvulaceae Calystegia sepium ssp. sepium Hedge Bindweed SU Convolvulaceae Calystegia sepium var. repens Trailing Bindweed SNA Convolvulaceae Calystegia spithamaea Low Bindweed SU Convolvulaceae Convolvulus arvensis Field Bindweed SNA Cornaceae Cornus alternifolia Alternate‐leaved Dogwood S3 Cornaceae Cornus canadensis Bunchberry S5 Cornaceae Cornus racemosa Gray Dogwood S3 Cornaceae Cornus rugosa Round‐leaved S3 Cornaceae Cornus sericea Red Osier Dogwood S5 Cornaceae Cornus sericea ssp. sericea Red‐osier Dogwood S5 Cornaceae Cornus suecica SU Crassulaceae Hylotelephium telephium Stonecrop SNA Crassulaceae Penthorum sedoides Ditch‐stonecrop S1S2 Crassulaceae Sedum acre Mossy Stonecrop SNA Crassulaceae Sedum hybridum Stonecrop SNA Crassulaceae Sedum lanceolatum Lanceleaf Stonecrop SNA Cucurbitaceae Bryonia cretica Bryony SNA Cucurbitaceae Bryonia cretica ssp. dioica Bryony SNA Cucurbitaceae Echinocystis lobata Wild Cucumber S5 Cucurbitaceae Thladiantha dubia Manchu Tuber‐gourd SNA Cupressaceae Juniperus communis Common Juniper S5 Cupressaceae Juniperus communis var. depressa SNR Cupressaceae Juniperus horizontalis Creeping Juniper S5 Cupressaceae Thuja occidentalis Eastern White Cedar S4 Cuscutaceae Cuscuta cephalanthi Dodder SU Cuscutaceae Cuscuta coryli Dodder SU Cuscutaceae Cuscuta epilinum Flax Dodder SNA Cuscutaceae Cuscuta gronovii Common Dodder S4 Cuscutaceae Cuscuta gronovii var. gronovii Dodder S4 Cuscutaceae Cuscuta megalocarpa Big‐fruit Dodder SU Cuscutaceae Cuscuta pentagona Dodder SU Cuscutaceae Cuscuta pentagona var. pentagona Dodder SU Cyperaceae Amphiscirpus nevadensis Nevada Bulrush S1 Cyperaceae Blysmopsis rufa Red Bulrush S2 Cyperaceae Bolboschoenus fluviatilis River Bulrush S4 Cyperaceae Bolboschoenus maritimus Sea Club‐rush S3? Cyperaceae Carex adelostoma Circumpolar Sedge S1 Cyperaceae Carex adusta Browned Sedge S3S4 Cyperaceae Carex albicans Bellow‐beaked Sedge SNA Cyperaceae Carex albicans var. albicans Bellow‐beaked Sedge SNA Cyperaceae Carex alopecoidea Foxtail Sedge S3S4 Cyperaceae Carex aquatilis Water Sedge S5 Cyperaceae Carex aquatilis var. aquatilis Water Sedge S5 Cyperaceae Carex aquatilis var. stans Water Sedge S3 Cyperaceae Carex arcta Narrow Sedge S1 Cyperaceae Carex arctata Black Sedge S1 Cyperaceae Carex argyrantha Silvery‐flowered Sedge SNA Cyperaceae Carex assiniboinensis Assiniboia Sedge S3S4 Cyperaceae Carex atherodes Awned Sedge S5 Cyperaceae Carex athrostachya Long‐bracted Sedge S1 Cyperaceae Carex atratiformis Black Sedge SU Cyperaceae Carex atrofusca Dark‐brown Sedge S1 Cyperaceae Carex aurea Golden Sedge S5 Cyperaceae Carex backii Back's Sedge S4S5 Cyperaceae Carex bebbii Bebb's Sedge S5 Cyperaceae Carex bicknellii Bicknell's Sedge SH Cyperaceae Carex bicknellii var. bicknellii Bicknell's Sedge SH Cyperaceae Carex bicolor Two‐coloured Sedge S2 Cyperaceae Carex bigelowii Stiff Sedge S3 Cyperaceae Carex blanda Pleasing Sedge S1 Cyperaceae Carex brevior Fescue Sedge S4 Cyperaceae Carex brunnescens Brownish Sedge S5 Cyperaceae Carex brunnescens ssp. brunnescens Brownish Sedge S4S5 Cyperaceae Carex brunnescens ssp. sphaerostachya Brownish Sedge S4S5 Cyperaceae Carex buxbaumii Brown Sedge S4S5 Cyperaceae Carex canescens Hoary Sedge S5 Cyperaceae Carex canescens ssp. canescens Hoary Sedge SNR Cyperaceae Carex capillaris Hair‐like Sedge S5 Cyperaceae Carex capitata Capitate Sedge S4 Cyperaceae Carex capitata ssp. arctogena Capitate Sedge S3 Cyperaceae Carex capitata ssp. capitata Capitate Sedge S4 Cyperaceae Carex castanea Chestnut Sedge S3 Cyperaceae Carex cephalophora Oval‐headed Sedge SNA Cyperaceae Carex chordorrhiza Prostrate Sedge S5 Cyperaceae Carex communis Fibrous‐rooted Sedge SNA Cyperaceae Carex concinna Beautiful Sedge S4S5 Cyperaceae Carex conoidea Field Sedge S1 Cyperaceae Carex crawei Crawe's Sedge S3S4 Cyperaceae Carex crawfordii Crawford's Sedge S4 Cyperaceae Carex crinita Long‐haired Sedge S1 Cyperaceae Carex crinita var. crinita Long‐haired Sedge S1 Cyperaceae Carex cristatella Crested Sedge S2 Cyperaceae Carex cryptolepis Northeastern Sedge S1 Cyperaceae Carex cumulata Clustered Sedge S1 Cyperaceae Carex deflexa Bent Sedge S5 Cyperaceae Carex deweyana Dewey's Sedge S5 Cyperaceae Carex diandra Two‐stamened Sedge S5 Cyperaceae Carex disperma Two‐seeded Sedge S5 Cyperaceae Carex douglasii Douglas Sedge S3? Cyperaceae Carex duriuscula Low Sedge S4 Cyperaceae Carex eburnea Bristle‐leaved Sedge S4S5 Cyperaceae Carex echinata Little Prickly Sedge SU Cyperaceae Carex echinata ssp. echinata Little Prickly Sedge SU Cyperaceae Carex emoryi Emory's Sedge S2? Cyperaceae Carex filifolia Thread‐leaved Sedge S3S4 Cyperaceae Carex flava Yellow Sedge S2S3 Cyperaceae Carex foenea Hay Sedge S5 Cyperaceae Carex fuliginosa Nodding Sedge SNA Cyperaceae Carex garberi Elk Sedge S1? Cyperaceae Carex glacialis Glacier Sedge S3 Cyperaceae Carex glareosa Weak‐clustered Sedge S1 Cyperaceae Carex glareosa ssp. glareosa Weak‐clustered Sedge S1 Cyperaceae Carex gracillima Slender Sedge S3 Cyperaceae Carex granularis Granular Sedge S4 Cyperaceae Carex granularis var. haleana Granular Sedge S4 Cyperaceae Carex gravida Heavy Sedge S1 Cyperaceae Carex gravida var. gravida Heavy Sedge S1 Cyperaceae Carex gynocrates Northern Bog Sedge S5 Cyperaceae Carex hallii Hall's Sedge S3 Cyperaceae Carex heleonastes Hudson Bay Sedge S2 Cyperaceae Carex heleonastes ssp. heleonastes Hudson Bay Sedge S2 Cyperaceae Carex hirta Hammer Sedge SNA Cyperaceae Carex hookerana Hooker's Sedge S1 Cyperaceae Carex houghtoniana Sand Sedge S5 Cyperaceae Carex hystericina Porcupine Sedge S3? Cyperaceae Carex inops Long‐stolon Sedge SU Cyperaceae Carex inops ssp. heliophila Sun Sedge SU Cyperaceae Carex interior Inland Sedge S4? Cyperaceae Carex intumescens Swollen Sedge S3? Cyperaceae Carex krausei SNR Cyperaceae Carex lachenalii Arctic Hare's‐foot Sedge SNA Cyperaceae Carex lacustris Lakeshore Sedge S5 Cyperaceae Carex laeviconica Smooth‐fruited Sedge S3? Cyperaceae Carex lapponica Lapland Sedge S3? Cyperaceae Carex lasiocarpa Hairy‐fruited Sedge S5 Cyperaceae Carex lenticularis Lens‐fruited Sedge S5 Cyperaceae Carex leptalea Bristle‐stalked Sedge S5 Cyperaceae Carex leptonervia Finely‐nerved Sedge S1S2 Cyperaceae Carex limosa Mud Sedge S5 Cyperaceae Carex livida Livid Sedge S3 Cyperaceae Carex loliacea Rye‐grass Sedge S2 Cyperaceae Carex mackenziei Mackenzie Sedge S2 Cyperaceae Carex magellanica Bog Sedge S5 Cyperaceae Carex magellanica ssp. irrigua Bog Sedge S5 Cyperaceae Carex marina Sea Sedge SU Cyperaceae Carex maritima Seaside Sedge S2 Cyperaceae Carex maritima var. maritima Seaside Sedge S2 Cyperaceae Carex meadii Mead's Sedge S1? Cyperaceae Carex media Intermediate Sedge S5 Cyperaceae Carex membranacea Sedge SNA Cyperaceae Carex merritt‐fernaldii Merritt Fernald's Sedge S1 Cyperaceae Carex michauxiana Long‐fruited Sedge S2 Cyperaceae Carex microglochin False Uncina Sedge S2 Cyperaceae Carex microptera Thick‐spike Sedge S1S2 Cyperaceae Carex misandra SNR Cyperaceae Carex molesta Troublesome Sedge SNA Cyperaceae Carex muskingumensis Muskingum Sedge SNA Cyperaceae Carex nardina Nard Sedge S1 Cyperaceae Carex normalis Larger Straw Sedge SNA Cyperaceae Carex norvegica Norway Sedge S2 Cyperaceae Carex obtusata Blunt Sedge S4 Cyperaceae Carex oligosperma Few‐fruited Sedge S3? Cyperaceae Carex oligosperma var. oligosperma Few‐fruited Sedge S3? Cyperaceae Carex paleacea Chaffy Sedge S1 Cyperaceae Carex parryana Parry's Sedge S3? Cyperaceae Carex pauciflora Few ‐flowered Sedge S3 Cyperaceae Carex peckii Black‐margined Sedge S5 Cyperaceae Carex pedunculata Stalked Sedge S3? Cyperaceae Carex pellita Woolly Sedge S5 Cyperaceae Carex pensylvanica Pennsylvania Sedge SU Cyperaceae Carex praegracilis Graceful Sedge S4 Cyperaceae Carex prairea Prairie Sedge S4? Cyperaceae Carex praticola Northern Meadow Sedge S5 Cyperaceae Carex projecta Necklace Sedge S2? Cyperaceae Carex pseudocyperus Cyperus‐like Sedge S4 Cyperaceae Carex radiata Stellate Sedge S4 Cyperaceae Carex rariflora Scant Sedge S3 Cyperaceae Carex rariflora var. rariflora Scant Sedge S3 Cyperaceae Carex recta Salt Sedge S1? Cyperaceae Carex retrorsa Turned Sedge S5 Cyperaceae Carex richardsonii Richardson's Sedge S4 Cyperaceae Carex rosea Stellate Sedge SNA Cyperaceae Carex rossii Ross' Sedge S5 Cyperaceae Carex rostrata Beaked Sedge S4 Cyperaceae Carex rotundata Roundfruit Sedge S3? Cyperaceae Carex rufina Reddish Sedge S1 Cyperaceae Carex rupestris Rock Sedge S2 Cyperaceae Carex salina Salt Sedge SNA Cyperaceae Carex sartwellii Sartwell's Sedge S4 Cyperaceae Carex saxatilis Rocky‐ground Sedge S4 Cyperaceae Carex saximontana Rocky Mountain Sedge S3 Cyperaceae Carex scirpoidea Rush‐like Sedge S5 Cyperaceae Carex scoparia Broom Sedge S1 Cyperaceae Carex siccata Dry‐spike Sedge S5 Cyperaceae Carex sprengelii Sprengel's Sedge S4 Cyperaceae Carex sterilis Dioecious Sedge S2 Cyperaceae Carex stipata Awl‐fruited Sedge S4 Cyperaceae Carex stricta Tussock Sedge S1 Cyperaceae Carex subspathacea Hoppner's Sedge S2 Cyperaceae Carex supina Weak Sedge S2? Cyperaceae Carex supina var. spaniocarpa Weak Sedge S2? Cyperaceae Carex sychnocephala Dense Long‐beaked Sedge S4? Cyperaceae Carex tenera Slender Sedge S4 Cyperaceae Carex tenuiflora Thin‐flowered Sedge S5 Cyperaceae Carex tetanica Rigid Sedge S2 Cyperaceae Carex tonsa Bald Sedge S5 Cyperaceae Carex torreyi Torrey's Sedge S4 Cyperaceae Carex tribuloides Prickly Sedge SNA Cyperaceae Carex trisperma Three‐seeded Sedge S5 Cyperaceae Carex umbellata Umbellate Sedge S5 Cyperaceae Carex ursina Bear Sedge SU Cyperaceae Carex utriculata Beaked Sedge S5 Cyperaceae Carex vaginata Sheathed Sedge S5 Cyperaceae Carex vesicaria Blister Sedge SU Cyperaceae Carex viridula Green Sedge S4? Cyperaceae Carex vulpinoidea Fox Sedge S3? Cyperaceae Carex williamsii William's Sedge S2 Cyperaceae Carex woodii Pretty Sedge SU Cyperaceae Carex x langeana Lange's Sedge SNR Cyperaceae Carex xerantica White‐scaled Sedge S3? Cyperaceae Cladium mariscoides Twig Rush S2 Cyperaceae Cyperus erythrorhizos Red‐root Flatsedge S1 Cyperaceae Cyperus houghtonii Houghton's Umbrella‐sedge S2 Cyperaceae Cyperus schweinitzii Schweinitz's Flatsedge S2 Cyperaceae Cyperus squarrosus Awned Flatsedge S2 Cyperaceae Cyperus strigosus Straw‐colored Flatsedge S2 Cyperaceae Dulichium arundinaceum Three‐way Sedge S2 Cyperaceae Eleocharis acicularis Needle Spike‐rush S5 Cyperaceae Eleocharis coloradoensis Small Spikerush SNA Cyperaceae Eleocharis compressa Flattened Spike‐rush SU Cyperaceae Eleocharis elliptica Slender Spike‐rush SU Cyperaceae Eleocharis engelmannii Engelmann's Spike‐rush S1 Cyperaceae Eleocharis erythropoda Bald Spikerush S5 Cyperaceae Eleocharis kamtschatica Kamtchatka Spikerush SNA Cyperaceae Eleocharis macrostachya Creeping spikerush SU Cyperaceae Eleocharis obtusa Blunt Spike‐rush S1 Cyperaceae Eleocharis ovata Ovate Spikerush SNA Cyperaceae Eleocharis palustris Creeping Spike‐rush S5 Cyperaceae Eleocharis quinqueflora Few‐flowered Spikerush S4 Cyperaceae Eleocharis uniglumis One‐glumed Spike‐rush S4? Cyperaceae Eriophorum angustifolium Tall Cotton‐grass S5 Cyperaceae Eriophorum brachyantherum Closed‐sheathed Cotton‐grass S5 Cyperaceae Eriophorum callitrix Beautiful Cotton‐grass S2 Cyperaceae Eriophorum chamissonis Russett Cotton‐grass S5 Cyperaceae Eriophorum gracile Slender Cotton‐grass S5 Cyperaceae Eriophorum scheuchzeri One‐spike Cotton‐grass S2? Cyperaceae Eriophorum vaginatum Sheathed Cotton‐grass S5 Cyperaceae Eriophorum vaginatum var. spissum Sheathed Cotton‐grass S5 Cyperaceae Eriophorum virginicum Tawny Cotton‐grass SNA Cyperaceae Eriophorum viridicarinatum Thin‐leaved Cotton‐grass S4 Cyperaceae Kobresia myosuroides Pacific Kobresia S1 Cyperaceae Kobresia simpliciuscula Simple Bog‐sedge S1 Cyperaceae Rhynchospora alba White Beakrush S3? Cyperaceae Rhynchospora capillacea Horned Beakrush S2 Cyperaceae Schoenoplectus acutus Hard‐stemmed Bulrush S4 Cyperaceae Schoenoplectus acutus var. acutus Hard‐stemmed Bulrush S4 Cyperaceae Schoenoplectus heterochaetus Slender Bulrush S1 Cyperaceae Schoenoplectus novae‐angliae Water Bulrush SNA Cyperaceae Schoenoplectus pungens Chair‐maker's rush S4 Cyperaceae Schoenoplectus pungens var. longispicatus Chair‐maker's Rush S4 Cyperaceae Schoenoplectus subterminalis Water Bulrush SU Cyperaceae Schoenoplectus tabernaemontani Soft‐stem Bulrush S5 Cyperaceae Schoenoplectus torreyi Torrey's Bulrush S1? Cyperaceae Scirpus atrocinctus Black‐girdle Bulrush S4 Cyperaceae Scirpus atrovirens Woolgrass Bulrush SNA Cyperaceae Scirpus cyperinus Wool‐grass S5 Cyperaceae Scirpus microcarpus Small Fruited‐bulrush S5 Cyperaceae Scirpus pallidus Green Bulrush S4? Cyperaceae Scirpus rufus var. neogaeus Red Bulrush S2 Cyperaceae Trichophorum alpinum Alpine Cotton‐grass S5 Cyperaceae Trichophorum caespitosum Tufted clubrush S4 Dennstaedtiaceae Pteridium aquilinum Bracken S4S5 Dennstaedtiaceae Pteridium aquilinum var. latiusculum Eastern Bracken S4S5 Dennstaedtiaceae Pteridium aquilinum var. pubescens Western Bracken SNA Diapensiaceae Diapensia lapponica Northern Diapensia S2 Dipsacaceae Knautia arvensis Field Scabious SNA Droseraceae Drosera anglica Oblong‐leaved Sundew S3 Droseraceae Drosera intermedia Spoon‐leaved Sundew SNA Droseraceae Drosera linearis Slender‐leaved Sundew S2 Droseraceae Drosera rotundifolia Round‐leaved Sundew S5 Dryopteridaceae Athyrium filix‐femina Lady Fern S5 Dryopteridaceae Athyrium filix‐femina ssp. angustum Lady Fern S5 Dryopteridaceae Athyrium filix‐femina var. cyclosorum Lady Fern SNA Dryopteridaceae Cystopteris bulbifera Bulblet Bladder Fern SNA Dryopteridaceae Cystopteris fragilis Fragile Fern S5 Dryopteridaceae Dryopteris carthusiana Spinulose Wood Fern S5 Dryopteridaceae Dryopteris cristata Crested Shield Fern S4 Dryopteridaceae Dryopteris fragrans Fragrant Shield Fern S3S4 Dryopteridaceae Dryopteris x uliginosa SNA Dryopteridaceae Gymnocarpium dryopteris Common Oak Fern S5 Dryopteridaceae Gymnocarpium jessoense Northern Oak Fern S3S4 Dryopteridaceae Gymnocarpium jessoense ssp. parvulum S3S4 Dryopteridaceae Gymnocarpium robertianum Limestone Oak Fern S1 Dryopteridaceae Gymnocarpium x intermedium SNA Dryopteridaceae Matteuccia struthiopteris Ostrich Fern S5 Dryopteridaceae Matteuccia struthiopteris var. pensylvanica S5 Dryopteridaceae Onoclea sensibilis Sensitive Fern S3S4 Dryopteridaceae Woodsia alpina Northern Woodsia S1 Dryopteridaceae Woodsia glabella Smooth Woodsia S2 Dryopteridaceae Woodsia ilvensis Rusty Woodsia S5 Dryopteridaceae Woodsia oregana Blunt‐lobed or Large Woodsia S1 Dryopteridaceae Woodsia oregana ssp. cathcartiana S1 Dryopteridaceae Woodsia scopulina Rocky Mountain Woodsia SNA Elaeagnaceae Elaeagnus angustifolia Russian Olive SNA Elaeagnaceae Elaeagnus commutata Silverberry S4 Elaeagnaceae Shepherdia argentea Silver Buffaloberry S4 Elaeagnaceae Shepherdia canadensis Soapberry S5 Elatinaceae Elatine americana mud‐purslane S1 Empetraceae Empetrum nigrum Black Crowberry S5 Equisetaceae Equisetum arvense Common Horsetail S5 Equisetaceae Equisetum fluviatile Swamp Horsetail S5 Equisetaceae Equisetum hyemale Common Scouring‐rush S5 Equisetaceae Equisetum hyemale var. affine S5 Equisetaceae Equisetum laevigatum Smooth Scouring‐rush S3S4 Equisetaceae Equisetum palustre Marsh Horsetail S4S5 Equisetaceae Equisetum pratense Meadow Horsetail S4S5 Equisetaceae Equisetum scirpoides Dwarf Scouring‐rush S5 Equisetaceae Equisetum sylvaticum Wood Horsetail S5 Equisetaceae Equisetum variegatum Variegated Horsetail S5 Equisetaceae Equisetum variegatum var. variegatum Variegated Horsetail S5 Equisetaceae Equisetum x ferrissii SNA Equisetaceae Equisetum x litorale SNA Equisetaceae Equisetum x nelsonii SNA Equisetaceae Equisetum x trachyodon SNA Ericaceae Andromeda polifolia Bog rosemary S5 Ericaceae Andromeda polifolia var. glaucophylla Bog‐rosemary S4 Ericaceae Andromeda polifolia var. polifolia Bog‐rosemary S5 Ericaceae Arctostaphylos alpina Alpine Bearberry S5 Ericaceae Arctostaphylos rubra Alpine Bearberry S5 Ericaceae Arctostaphylos uva‐ursi Common Bearberry S5 Ericaceae Cassiope tetragona Arctic White Heather SNA Ericaceae Chamaedaphne calyculata Leather‐leaf S5 Ericaceae Epigaea repens Mayflower S3 Ericaceae Gaultheria hispidula Creeping Snowberry S5 Ericaceae Gaultheria procumbens Teaberry S3S4 Ericaceae Kalmia microphylla Bog‐laurel S1S2 Ericaceae Kalmia polifolia Bog‐laurel S5 Ericaceae Ledum groenlandicum Labrador‐tea S5 Ericaceae Ledum palustre Dwarf Labrador‐tea S4 Ericaceae Ledum palustre ssp. decumbens Dwarf Labrador‐tea S4 Ericaceae Loiseleuria procumbens Alpine Azalea S3 Ericaceae Phyllodoce caerulea Purple Mountain‐heather S2 Ericaceae Rhododendron lapponicum Lapland Rose‐bay S2 Ericaceae Vaccinium angustifolium Low Sweet Blueberry S4 Ericaceae Vaccinium caespitosum Dwarf Bilberry S3 Ericaceae Vaccinium macrocarpon Large Cranberry SNA Ericaceae Vaccinium myrtilloides Velvet‐leaf Blueberry S5 Ericaceae Vaccinium oxycoccos Small Cranberry S5 Ericaceae Vaccinium uliginosum Bog Whortleberry S5 Ericaceae Vaccinium uliginosum ssp. pubescens Bog Whortleberry S5 Ericaceae Vaccinium vitis‐idaea Bog Cranberry S5 Eriocaulaceae Eriocaulon aquaticum White‐buttons S1 Euphorbiaceae Chamaesyce geyeri Prostrate Spurge S1 Euphorbiaceae Chamaesyce glyptosperma Ridge‐seeded Spurge S4 Euphorbiaceae Chamaesyce serpyllifolia Thyme‐leaved Spurge S3 Euphorbiaceae Euphorbia cyparissias Cypress Spurge SNA Euphorbiaceae Euphorbia esula Leafy Spurge SNA Euphorbiaceae Euphorbia helioscopia Summer Spurge SNA Euphorbiaceae Euphorbia marginata Snow‐on‐the‐mountain SNA Euphorbiaceae Euphorbia peplus Petty Spurge SNA Fabaceae Amorpha canescens Leadplant S4 Fabaceae Amorpha fruticosa False Indigo S1S2 Fabaceae Amorpha nana Fragrant False Indigo S4 Fabaceae Amphicarpaea bracteata Hog‐peanut S4 Fabaceae Anthyllis vulneraria Lady's‐fingers SNA Fabaceae Astragalus agrestis Milkvetch S5 Fabaceae Astragalus alpinus Alpine Milkvetch S5 Fabaceae Astragalus alpinus var. alpinus SNR Fabaceae Astragalus americanus American Milkvetch S3 Fabaceae Astragalus australis Indian milkvetch S1? Fabaceae Astragalus bisulcatus Two‐grooved Milkvetch S4 Fabaceae Astragalus bodinii Milkvetch S1 Fabaceae Astragalus canadensis Canadian Milkvetch S5 Fabaceae Astragalus canadensis var. canadensis Canadian Milkvetch S5 Fabaceae Astragalus cicer Cicer Milkvetch SNA Fabaceae Astragalus crassicarpus Ground‐plum S4 Fabaceae Astragalus drummondii Drummond's Milkvetch SNA Fabaceae Astragalus eucosmus Pretty Milkvetch S4 Fabaceae Astragalus flexuosus Slender or Low Milkvetch S4 Fabaceae Astragalus gilviflorus Cushion Milkvetch S1 Fabaceae Astragalus gilviflorus var. gilviflorus Threeleaf Milkvetch S1 Fabaceae Astragalus laxmannii Ascending Milkvetch S5 Fabaceae Astragalus laxmannii var. robustior Ascending Milkvetch S5 Fabaceae Astragalus lotiflorus Low Milkvetch S1 Fabaceae Astragalus missouriensis Missouri Milkvetch S4 Fabaceae Astragalus neglectus Milkvetch S1 Fabaceae Astragalus pectinatus Narrow‐leaved Milkvetch S2S3 Fabaceae Astragalus tenellus Loose‐flowered Milkvetch S4 Fabaceae Caragana arborescens Common Caragana SNA Fabaceae Cicer arietinum Chick‐pea SNA Fabaceae Coronilla varia Field Crown‐vetch SNA Fabaceae Dalea candida White Prairie‐clover S4 Fabaceae Dalea candida var. candida White Prairie‐clover S4 Fabaceae Dalea candida var. oligophylla White Prairie‐clover S3 Fabaceae Dalea purpurea Purple Prairie Clover S4 Fabaceae Dalea purpurea var. purpurea Purple Prairie Clover S4 Fabaceae Dalea villosa Silky Prairie‐clover S2S3 Fabaceae Dalea villosa var. villosa Silky Prairie‐clover S2S3 Fabaceae Desmodium canadense Beggar's‐lice S2 Fabaceae Glycyrrhiza lepidota Wild Licorice S5 Fabaceae Hedysarum alpinum American Hedysarum S4 Fabaceae Hedysarum alpinum var. americanum American Hedysarum S4 Fabaceae Hedysarum alpinum var. philoscia American Hedysarum S4 Fabaceae Hedysarum boreale Northern Hedysarum S4 Fabaceae Hedysarum boreale ssp. mackenziei Northern Hedysarum S4 Fabaceae Lathyrus japonicus Beach‐pea S4 Fabaceae Lathyrus japonicus var. japonicus Beach‐pea SU Fabaceae Lathyrus japonicus var. maritimus Beach‐pea S4 Fabaceae Lathyrus japonicus var. parviflorus Beach‐pea SU Fabaceae Lathyrus ochroleucus Pale Vetchling S4S5 Fabaceae Lathyrus palustris Marsh Vetchling S5 Fabaceae Lathyrus tuberosus Tuberous Vetchling SNA Fabaceae Lathyrus venosus Wild Peavine S5 Fabaceae Lotus corniculatus Bird's‐foot Trefoil SNA Fabaceae Lotus pedunculatus Trefoil SNA Fabaceae Lotus unifoliolatus prarie trefoil S2S3 Fabaceae Medicago lupulina Black Medick SNA Fabaceae Medicago sativa Alfalfa SNA Fabaceae Medicago sativa ssp. falcata Yellow Lucerne SNA Fabaceae Melilotus albus White Sweet Clover SNA Fabaceae Melilotus elegans Elegant Sweet‐clover SNA Fabaceae Melilotus indicus Yellow Sweet Clover SNA Fabaceae Melilotus officinalis Yellow Sweet Clover SNA Fabaceae Melilotus wolgicus Volga Sweet‐clover SNA Fabaceae Onobrychis viciifolia Holy Clover SNA Fabaceae Oxytropis arctica Arctic Locoweed S1 Fabaceae Oxytropis arctica var. bellii Bell's Point‐vetch S1 Fabaceae Oxytropis borealis Locoweed SU Fabaceae Oxytropis borealis var. hudsonica Locoweed SU Fabaceae Oxytropis campestris Late Yellow Locoweed S1? Fabaceae Oxytropis campestris var. dispar Late Yellow Locoweed SU Fabaceae Oxytropis campestris var. johannensis Late Yellow Locoweed S1? Fabaceae Oxytropis campestris var. minor Late Yellow Locoweed SNA Fabaceae Oxytropis campestris var. spicata Showy Locoweed S1 Fabaceae Oxytropis campestris var. varians Late Yellow Locoweed SU Fabaceae Oxytropis deflexa Reflexed Locoweed S3? Fabaceae Oxytropis deflexa var. foliolosa Reflexed Locoweed SU Fabaceae Oxytropis deflexa var. sericea Reflexed Locoweed S3? Fabaceae Oxytropis lambertii Purple Locoweed S3S4 Fabaceae Oxytropis maydelliana Maydell's oxytrope SNR Fabaceae Oxytropis monticola Yellow‐flower Locoweed S4 Fabaceae Oxytropis sericea Early Yellow Locoweed S1 Fabaceae Oxytropis splendens Showy Locoweed S4 Fabaceae Pediomelum argophyllum Silverweed S4 Fabaceae Pediomelum esculentum Indian Breadroot S4 Fabaceae Phaseolus vulgaris Bean SNA Fabaceae Pisum sativum Garden Pea SNA Fabaceae Thermopsis rhombifolia Golden Bean S2 Fabaceae Trifolium arvense Rabbit‐foot‐clover SNA Fabaceae Trifolium campestre Low Hop‐clover SNA Fabaceae Trifolium hybridum Alsike Clover SNA Fabaceae Trifolium incarnatum Crimson Clover SNA Fabaceae Trifolium pratense Red Clover SNA Fabaceae Trifolium repens White Clover SNA Fabaceae Trigonella caerulea Trigonella SNA Fabaceae Vicia americana Common Vetch S5 Fabaceae Vicia americana ssp. americana American Vetch S5 Fabaceae Vicia americana ssp. minor Common Vetch S5 Fabaceae Vicia cracca Tufted Vetch SNA Fabaceae Vicia faba Broadbean SNA Fabaceae Vicia sativa Spring‐vetch SNA Fabaceae Vicia villosa Hairy or Winter Vetch SNA Fagaceae Quercus ellipsoidalis Northern Pin Oak SNA Fagaceae Quercus macrocarpa Bur Oak S5 Fumariaceae Adlumia fungosa Climbing Fumitory SU Fumariaceae Corydalis aurea Golden Corydalis S5 Fumariaceae Corydalis aurea ssp. aurea Golden Corydalis S5 Fumariaceae Corydalis sempervirens Pink Corydalis S5 Fumariaceae Dicentra cucullaria Dutchman's‐breeches S1 Fumariaceae Fumaria officinalis Common Fumitory SNA Gentianaceae Gentiana affinis Oblong‐leaved Gentian S4 Gentianaceae Gentiana andrewsii Closed Gentian S4 Gentianaceae Gentiana andrewsii var. andrewsii Closed Gentian SU Gentianaceae Gentiana andrewsii var. dakotica Closed Gentian SU Gentianaceae Gentiana linearis Closed Gentian SNA Gentianaceae Gentiana puberulenta Downy Gentian S2 Gentianaceae Gentiana rubricaulis Closed Gentian S2S3 Gentianaceae Gentianella amarella Felwort S5 Gentianaceae Gentianella amarella ssp. acuta Felwort S5 Gentianaceae Gentianella propinqua Felwort S3 Gentianaceae Gentianella propinqua ssp. propinqua Felwort S3 Gentianaceae Gentianopsis crinita Fringed Gentian S4 Gentianaceae Gentianopsis macounii Fringed Gentian S4 Gentianaceae Gentianopsis virgata Fringed Gentian S4 Gentianaceae Halenia deflexa Spurred Gentian S5 Gentianaceae Halenia deflexa ssp. deflexa Spurred Gentian S5 Gentianaceae Lomatogonium rotatum Marsh Felwort S2S3 Geraniaceae Erodium cicutarium Alfilaria SNA Geraniaceae Geranium bicknellii Bicknell's Geranium S5 Geraniaceae Geranium carolinianum Carolina Wild Geranium S4 Geraniaceae Geranium carolinianum var. sphaerospermum Carolina Wild Geranium S4 Geraniaceae Geranium maculatum Wild Crane's‐bill S1 Geraniaceae Geranium pratense Meadow Geranium SNA Geraniaceae Geranium pusillum Small‐flowered Crane's‐bill SNA Geraniaceae Geranium robertianum Herb‐robert SNA Grossulariaceae Ribes americanum Wild Black Currant S5 Grossulariaceae Ribes diacanthum Siberian Currant SNA Grossulariaceae Ribes glandulosum Skunk Currant S5 Grossulariaceae Ribes hirtellum Smooth Gooseberry S4 Grossulariaceae Ribes hudsonianum Northern Wild Black Currant S5 Grossulariaceae Ribes hudsonianum var. hudsonianum Northern Wild Black Currant S5 Grossulariaceae Ribes lacustre Bristly Black Currant S4 Grossulariaceae Ribes oxyacanthoides Bristly Wild Gooseberry S5 Grossulariaceae Ribes oxyacanthoides ssp. oxyacanthoides Bristly Wild Gooseberry S5 Grossulariaceae Ribes rubrum Northern Red Currant SNA Grossulariaceae Ribes triste Wild Red Currant S5 Haloragaceae Myriophyllum alterniflorum Water‐milfoil S2? Haloragaceae Myriophyllum farwellii Farwell's Water‐milfoil S1 Haloragaceae Myriophyllum sibiricum Spiked Water‐milfoil S5 Haloragaceae Myriophyllum verticillatum Whorled Water‐milfoil SU Hippuridaceae Hippuris tetraphylla Four‐leaved Mare's‐tail S3S4 Hippuridaceae Hippuris vulgaris Mare's‐tail S5 Hydrocharitaceae Elodea bifoliata Two‐leaf Water‐weed SNA Hydrocharitaceae Elodea canadensis Canada Waterweed S5 Hydrocharitaceae Elodea nuttallii Waterweed S1 Hydrocharitaceae Vallisneria americana Water‐celery S4? Hydrophyllaceae Ellisia nyctelea Waterpod S4 Hydrophyllaceae Hydrophyllum virginianum John's‐cabbage SU Hydrophyllaceae Phacelia campanularia Scorpionweed SNA Hydrophyllaceae Phacelia franklinii Franklin's Scorpionweed S5 Hydrophyllaceae Phacelia tanacetifolia Fiddle‐neck SNA Iridaceae Iris germanica German Iris SNA Iridaceae Iris pseudacorus Yellow Iris of Europe SNA Iridaceae Iris versicolor Blue Flag S4 Iridaceae Sisyrinchium campestre White‐eyed Grass SU Iridaceae Sisyrinchium montanum Common Blue‐eyed Grass S5 Iridaceae Sisyrinchium mucronatum Michaux's Blue‐eyed Grass S1? Isoetaceae Isoetes echinospora Spiny‐spored Quillwort S3S4 Isoetaceae Isoetes lacustris Quillwort S2 Juglandaceae Juglans cinerea Butternut SNA Juglandaceae Juglans nigra Black Walnut SNA Juncaceae Juncus alpinoarticulatus Alpine rush S5 Juncaceae Juncus alpinoarticulatus ssp. americanus Alpine Rush S5 Juncaceae Juncus arcticus Arctic Rush S5 Juncaceae Juncus arcticus ssp. alaskanus Arctic Rush S4 Juncaceae Juncus arcticus var. balticus Baltic Rush S5 Juncaceae Juncus biglumis Two‐glumed Rush SU Juncaceae Juncus brevicaudatus Short‐tail Rush S3? Juncaceae Juncus bufonius Toad Rush S5 Juncaceae Juncus canadensis Canada Rush S1? Juncaceae Juncus castaneus Chestnut Rush S3? Juncaceae Juncus castaneus var. pallidus Chestnut Rush SU Juncaceae Juncus compressus Flattened Rush SNA Juncaceae Juncus dudleyi Dudley's Rush S5 Juncaceae Juncus effusus Soft Rush SNA Juncaceae Juncus filiformis Thread Rush S5? Juncaceae Juncus gerardii Black‐grass SNA Juncaceae Juncus interior Inland Rush S1 Juncaceae Juncus longistylis Long‐styled Rush S4 Juncaceae Juncus nodosus Knotted Rush S5 Juncaceae Juncus stygius Moor Rush S1? Juncaceae Juncus stygius ssp. americanus Moor Rush S1? Juncaceae Juncus tenuis Slender Rush S5 Juncaceae Juncus torreyi Torrey's Rush S4 Juncaceae Juncus triglumis Three‐flowered Rush S4 Juncaceae Juncus vaseyi Big‐head Rush S4? Juncaceae Luzula acuminata Hairy Wood‐rush S4 Juncaceae Luzula acuminata var. acuminata Hairy Wood‐rush S4 Juncaceae Luzula arctica arctic wood rush SNA Juncaceae Luzula confusa Northern Wood‐rush S3? Juncaceae Luzula groenlandica Greenland Wood‐rush S1 Juncaceae Luzula multiflora Wood‐rush S4? Juncaceae Luzula multiflora ssp. frigida Wood‐rush S4? Juncaceae Luzula parviflora Small‐flowered Woodrush S5 Juncaceae Luzula parviflora ssp. melanocarpa Small‐flowered Wood‐rush S5 Juncaceae Luzula spicata Spiked Wood‐rush S1 Juncaceae Luzula wahlenbergii Wahlenberg's Wood‐rush S2? Juncaginaceae Triglochin maritima Seaside Arrow‐grass S5 Juncaginaceae Triglochin palustris Marsh Arrow‐grass S5 Lamiaceae Agastache foeniculum Blue Giant Hyssop S5 Lamiaceae Dracocephalum parviflorum American Dragon‐head S5 Lamiaceae Dracocephalum thymiflorum Dragonhead SNA Lamiaceae Elsholtzia ciliata Crested Elsholtzia SNA Lamiaceae Galeopsis bifida Common Hemp‐nettle SNA Lamiaceae Galeopsis ladanum Red Hemp‐nettle SNA Lamiaceae Galeopsis tetrahit Common Hemp‐nettle SNA Lamiaceae Glechoma hederacea Gill‐over‐the‐ground SNA Lamiaceae Hedeoma hispida Mock Pennyroyal S1 Lamiaceae Lamium album White Dead‐nettle SNA Lamiaceae Lamium amplexicaule Henbit SNA Lamiaceae Leonurus cardiaca Common Motherwort SNA Lamiaceae Leonurus sibiricus Siberian Motherwort SNA Lamiaceae Lycopus americanus Water Hore‐hound S5 Lamiaceae Lycopus asper Western Water‐horehound S4 Lamiaceae Lycopus uniflorus Northern Bugle‐weed S5 Lamiaceae Melissa officinalis Common Balm SNA Lamiaceae Mentha arvensis Common Mint S5 Lamiaceae Mentha spicata Spearmint SNA Lamiaceae Monarda fistulosa Wild Bergamot S5 Lamiaceae Monarda fistulosa var. menthifolia Wild Bergamot S4 Lamiaceae Monarda fistulosa var. mollis Wild Bergamot S4 Lamiaceae Nepeta cataria Catnip SNA Lamiaceae Physostegia ledinghamii Dragonhead SU Lamiaceae Physostegia parviflora Dragonhead SU Lamiaceae Physostegia virginiana False Dragonhead SU Lamiaceae Physostegia virginiana ssp. virginiana False Dragonhead SU Lamiaceae Prunella vulgaris Heal‐all S4 Lamiaceae Prunella vulgaris ssp. lanceolata Healall S4 Lamiaceae Prunella vulgaris ssp. vulgaris Heal‐all SNA Lamiaceae Salvia reflexa Lance‐leaved Sage SNA Lamiaceae Salvia x sylvestris Sage SNA Lamiaceae Satureja hortensis Summer Savory SNA Lamiaceae Scutellaria galericulata Hooded Skullcap S5 Lamiaceae Scutellaria lateriflora Mad‐dog Skullcap S4 Lamiaceae Scutellaria parvula Small Skullcap S1 Lamiaceae Scutellaria parvula var. missouriensis Small Skullcap S1 Lamiaceae Stachys palustris Marsh Hedge‐nettle S5 Lamiaceae Stachys pilosa Woundwort S5 Lamiaceae Stachys pilosa var. arenicola Woundwort SU Lamiaceae Stachys pilosa var. pilosa Woundwort SU Lamiaceae Stachys tenuifolia Smooth Hedge Nettle S4 Lamiaceae Teucrium canadense American Germander S3S4 Lamiaceae Teucrium canadense var. occidentale Hairy Germander S3S4 Lamiaceae Thymus pulegioides Lemon Thyme SNA Lemnaceae Lemna minor Lesser Duckweed SNA Lemnaceae Lemna trisulca Star Duckweed S5 Lemnaceae Lemna turionifera Duckweed SU Lemnaceae Spirodela polyrrhiza Water‐flaxseed S4? Lemnaceae Wolffia columbiana Water‐meal S1 Lentibulariaceae Pinguicula villosa Small Butterwort S3S4 Lentibulariaceae Pinguicula vulgaris Common Butterwort S5 Lentibulariaceae Utricularia cornuta Horned Bladderwort S3 Lentibulariaceae Utricularia intermedia Flat‐leaved Bladderwort S5 Lentibulariaceae Utricularia macrorhiza Greater bladderwort S5 Lentibulariaceae Utricularia minor Lesser Bladderwort S3 Liliaceae Allium cernuum Nodding Onion SNA Liliaceae Allium cernuum var. obtusum Nodding Onion SNA Liliaceae Allium sativum Garlic SNA Liliaceae Allium schoenoprasum Chives S4? Liliaceae Allium schoenoprasum var. sibiricum Chives S4? Liliaceae Allium stellatum Pink‐flowered Onion S5 Liliaceae Allium textile Prairie Onion S3? Liliaceae Allium tricoccum Wild Leek S1 Liliaceae Asparagus officinalis Garden Asparagus SNA Liliaceae Clintonia borealis Blue Bead‐lily S4? Liliaceae Hypoxis hirsuta Yellow Stargrass S4 Liliaceae Lilium philadelphicum Wood Lily S4 Liliaceae Lilium philadelphicum var. andinum Woodlily S4 Liliaceae Lilium philadelphicum var. philadelphicum Woodlily SNA Liliaceae Maianthemum canadense Two‐leaved Solomon's‐seal S5 Liliaceae Maianthemum canadense var. interius Two‐leaved Solomon's‐seal S4? Liliaceae Maianthemum racemosum False Spikenard S2? Liliaceae Maianthemum racemosum ssp. racemosum False Spikenard S2? Liliaceae Maianthemum stellatum Star‐flowered Solomon's‐seal S5 Liliaceae Maianthemum trifolium Three‐leaved Solomon's‐seal S5 Liliaceae Polygonatum biflorum Hairy Solomon's‐seal S3? Liliaceae Polygonatum biflorum var. commutatum Hairy Solomon's‐seal S3? Liliaceae Prosartes trachycarpa Fairybells S4 Liliaceae Streptopus amplexifolius White Mandarin S3? Liliaceae Streptopus amplexifolius var. amplexifolius White Mandarin S3? Liliaceae Streptopus lanceolatus Rose Mandarin S4 Liliaceae Streptopus lanceolatus var. lanceolatus Rose Mandarin S4 Liliaceae Streptopus lanceolatus var. longipes Rose Mandarin S3? Liliaceae Tofieldia pusilla Bog Asphodel S4 Liliaceae Triantha glutinosa Sticky False Asphodel S5 Liliaceae Trillium cernuum Nodding Trillium S4 Liliaceae Trillium erectum Purple Trillium SNA Liliaceae Trillium undulatum Painted Trillium SNA Liliaceae Uvularia grandiflora Large‐flowered Bellwort SNA Liliaceae Uvularia sessilifolia Small Bellwort S2 Liliaceae Zigadenus elegans White Camas S5 Linaceae Linum lewisii Blue Flax S4 Linaceae Linum lewisii var. lepagei Lewis Wild Flax S1 Linaceae Linum lewisii var. lewisii Blue Flax S4 Linaceae Linum perenne Perennial Flax SU Linaceae Linum rigidum Large‐flowered Yellow Flax S4 Linaceae Linum sulcatum Grooved Yellow Flax S3 Linaceae Linum usitatissimum Common Blue Flax SNA Loasaceae Mentzelia decapetala Gumbo‐lily SH Lycopodiaceae Diphasiastrum complanatum Trailing Club‐moss S3S4 Lycopodiaceae Diphasiastrum sabinifolium Savin‐leaved Ground Cedar S3 Lycopodiaceae Diphasiastrum sitchense Ground‐fir S1 Lycopodiaceae Diphasiastrum tristachyum Ground‐cedar S3 Lycopodiaceae Diphasiastrum x zeilleri Zeiller's Ground Cedar SNA Lycopodiaceae Huperzia appalachiana Mountain Firmoss S2S3 Lycopodiaceae Huperzia lucidula Shining Club‐moss S1 Lycopodiaceae Huperzia selago Mountain Club‐moss S2S3 Lycopodiaceae Huperzia x buttersii SNA Lycopodiaceae Lycopodiella inundata Bog Club‐moss S1 Lycopodiaceae Lycopodium annotinum Stiff Club‐moss S5 Lycopodiaceae Lycopodium clavatum Running Pine S3 Lycopodiaceae Lycopodium clavatum var. clavatum Running‐pine S2 Lycopodiaceae Lycopodium dendroideum Ground‐pine S3S4 Lycopodiaceae Lycopodium hickeyi Hickey's Tree Club‐moss S3S4 Lycopodiaceae Lycopodium lagopus Running‐pine S3 Lythraceae Lythrum salicaria Purple Loosestrife SNA Malvaceae Abutilon theophrasti Velvet‐leaf SNA Malvaceae Alcea rosea Hollyhock SNA Malvaceae Hibiscus trionum Flower‐of‐an‐hour SNA Malvaceae Lavatera thuringiaca Tree Mallow SNA Malvaceae Malva moschata Musk Mallow SNA Malvaceae Malva neglecta Common Mallow SNA Malvaceae Malva rotundifolia Running Mallow SNA Malvaceae Malva verticillata Curled Mallow SNA Malvaceae Sphaeralcea coccinea Slobe Mallow S4 Marsileaceae Marsilea vestita Clover‐fern SNA Menispermaceae Menispermum canadense Moonseed S3 Menyanthaceae Menyanthes trifoliata Bogbean S5 Molluginaceae Mollugo verticillata Carpetweed SNA Monotropaceae Monotropa hypopithys Pinesap S1 Monotropaceae Monotropa uniflora Indian‐pipe S4 Myricaceae Myrica gale Sweet Gale S5 Myricaceae Myrica gale var. gale Sweet Gale S5 Myricaceae Myrica gale var. subglabra Sweet Gale S5 Najadaceae Najas flexilis Slender Naiad S4 Najadaceae Najas guadalupensis Southern Naiad SNA Najadaceae Najas guadalupensis ssp. olivacea Southern Naiad SNA Nyctaginaceae Mirabilis albida hairy umbrellawort S3 Nyctaginaceae Mirabilis linearis Hairy Umbrellawort SU Nyctaginaceae Mirabilis nyctaginea Heart‐leaved Umbrellawort S4 Nymphaeaceae Nuphar lutea American Lotus S5 Nymphaeaceae Nuphar microphylla Small Yellow Pond‐lily S4 Nymphaeaceae Nuphar rubrodisca Yellow Pond‐lily SU Nymphaeaceae Nuphar variegata Yellow Pond‐lily S5 Nymphaeaceae Nymphaea leibergii Small Water‐lily S4 Nymphaeaceae Nymphaea odorata Fragrant Water‐lily S2 Nymphaeaceae Nymphaea odorata ssp. odorata Fragrant Water‐lily S2 Nymphaeaceae Nymphaea odorata ssp. tuberosa Tubreous White Water‐lily S1 Nymphaeaceae Nymphaea tetragona Small Water‐lily S2 Oleaceae Fraxinus nigra Black Ash S3 Oleaceae Fraxinus pennsylvanica Red Ash S5 Onagraceae Calylophus serrulatus Shrubby Evening‐primrose S3S4 Onagraceae Chamerion angustifolium Fireweed S5 Onagraceae Chamerion latifolium River Beauty S3 Onagraceae Circaea alpina Small Enchanter's‐nightshade S5 Onagraceae Circaea lutetiana Southern Broadleaf Enchanter's‐nightshade S2 Onagraceae Circaea lutetiana ssp. canadensis Large Enchanter's‐nightshade S2 Onagraceae Circaea x intermedia Enchanter's‐nightshade SNA Onagraceae Epilobium angustifolium ssp. angustifolium Fireweed S5? Onagraceae Epilobium angustifolium ssp. circumvagum Fireweed S5? Onagraceae Epilobium brachycarpum Annual Willowherb S1S2 Onagraceae Epilobium ciliatum Hairy Willow‐herb S5 Onagraceae Epilobium ciliatum ssp. ciliatum Hairy Willow‐herb S5 Onagraceae Epilobium ciliatum ssp. glandulosum Willow‐herb S5 Onagraceae Epilobium ciliatum ssp. watsonii Willow‐herb SU Onagraceae Epilobium davuricum Willowherb S2S3 Onagraceae Epilobium leptophyllum Willowherb S5 Onagraceae Epilobium palustre Marsh Willowherb S5 Onagraceae Gaura coccinea Scarlet Gaura S4 Onagraceae Oenothera biennis Evening‐primrose S5 Onagraceae Oenothera caespitosa Tufted Evening‐primrose S1 Onagraceae Oenothera flava Long‐tubed Evening‐primrose SNA Onagraceae Oenothera flava ssp. flava Long‐tubed Evening‐primrose SNA Onagraceae Oenothera fruticosa Narrowleaf Sundrops SNA Onagraceae Oenothera fruticosa ssp. fruticosa Common Sundrop SNA Onagraceae Oenothera nuttallii White Evening‐primrose S4 Onagraceae Oenothera parviflora Evening‐primrose S3 Onagraceae Oenothera perennis Sundrops S1S2 Ophioglossaceae Botrychium campestre Prairie Moonwort S1 Ophioglossaceae Botrychium lunaria Common Moonwort S3S4 Ophioglossaceae Botrychium matricariifolium Daisy‐leaf Moonwort S1? Ophioglossaceae Botrychium minganense Mingan Moonwort S2S3 Ophioglossaceae Botrychium multifidum Leathery Grape‐fern S3 Ophioglossaceae Botrychium oneidense Blunt‐lobed Moonwort S1 Ophioglossaceae Botrychium pallidum Pale Moonwort SH Ophioglossaceae Botrychium simplex Least Grapefern S1 Ophioglossaceae Botrychium spathulatum Spatulate moonwort S1 Ophioglossaceae Botrychium virginianum Rattlesnake Fern S4 Ophioglossaceae Ophioglossum pusillum Northern Adder's‐tongue S1 Orchidaceae Amerorchis rotundifolia Small or Round‐leaved Orchis S5 Orchidaceae Arethusa bulbosa Arethusa S2 Orchidaceae Calopogon tuberosus Swamp‐pink S2 Orchidaceae Calypso bulbosa Calypso S4 Orchidaceae Calypso bulbosa var. americana SNR Orchidaceae Coeloglossum viride Frog‐orchis S5 Orchidaceae Coeloglossum viride var. virescens Frog‐orchis S5 Orchidaceae Coeloglossum viride var. viride Frog‐orchis SNA Orchidaceae Corallorhiza maculata Large or Spotted Coralroot S4 Orchidaceae Corallorhiza striata Striped Coralroot S3S4 Orchidaceae Corallorhiza trifida Early Coralroot S5 Orchidaceae Cypripedium acaule Stemless Lady's‐slipper S4 Orchidaceae Cypripedium arietinum Ram's Head Lady's‐slipper S2S3 Orchidaceae Cypripedium candidum Small White Lady's‐slipper S2 Orchidaceae Cypripedium parviflorum Yellow Lady's‐slipper S5? Orchidaceae Cypripedium parviflorum var. makasin Yellow Lady's‐Slipper S4? Orchidaceae Cypripedium parviflorum var. pubescens Large Yellow Lady's‐slipper S5? Orchidaceae Cypripedium passerinum Sparrow's‐egg Lady's‐slipper S4 Orchidaceae Cypripedium reginae Showy Lady's‐slipper S4 Orchidaceae Cypripedium x andrewsii Andrews' Lady's‐slipper (Hybrid) SNA Orchidaceae Epipactis helleborine Broad‐leaved helleborine (green‐flowered form) SNA Orchidaceae Goodyera repens Lesser Rattlesnake Plantain S5 Orchidaceae Goodyera repens var. ophioides Lesser Rattlesnake Plantain S5 Orchidaceae Goodyera tesselata Tesselated Rattlesnake Plantain S2 Orchidaceae Liparis loeselii Yellow Twayblade S3S4 Orchidaceae Listera auriculata Auricled Twayblade S1 Orchidaceae Listera borealis Northern Twayblade S2 Orchidaceae Listera cordata Heartleaf Twayblade S4? Orchidaceae Listera cordata var. cordata Heartleaf Twayblade SU Orchidaceae Listera cordata var. nephrophylla Heartleaf Twayblade SU Orchidaceae Malaxis monophyllos White Adder's‐mouth S2? Orchidaceae Malaxis paludosa Bog Adder's‐mouth S1 Orchidaceae Malaxis unifolia Green Adder's‐mouth S2? Orchidaceae Platanthera aquilonis Tall Northern Green Orchid S5 Orchidaceae Platanthera dilatata Bog Candle S4 Orchidaceae Platanthera hookeri Hooker's Orchid S2 Orchidaceae Platanthera huronensis Huron Fringed‐orchid S5 Orchidaceae Platanthera hyperborea Northern green orchid SNA Orchidaceae Platanthera lacera Fringed Orchid S2 Orchidaceae Platanthera lacera var. lacera Fringed Orchid S2 Orchidaceae Platanthera leucophaea Eastern Prairie White‐fringed Orchid SNA Orchidaceae Platanthera macrophylla Round‐leaved Bog Orchid SU Orchidaceae Platanthera obtusata Small Northern Bog Orchid S5 Orchidaceae Platanthera orbiculata Round‐leaved Bog Orchid S3 Orchidaceae Platanthera orbiculata var. orbiculata Round‐leaved Bog Orchid SU Orchidaceae Platanthera praeclara Western Prairie Fringed Orchid S1 Orchidaceae Platanthera psycodes Small Purple‐fringed Orchid S1 Orchidaceae Pogonia ophioglossoides Rose Pogonia S1 Orchidaceae Spiranthes cernua Nodding Ladies'‐tresses SNA Orchidaceae Spiranthes lacera Northern Slender Ladies'‐tresses S3S4 Orchidaceae Spiranthes lacera var. lacera Northern Slender Ladies'‐tresses S3S4 Orchidaceae Spiranthes magnicamporum Great Plains Ladies'‐tresses S1S2 Orchidaceae Spiranthes romanzoffiana Hooded Ladies'‐tresses S5 Orobanchaceae Conopholis americana Cancer‐root SU Orobanchaceae Orobanche fasciculata Clustered Broom‐rape S3 Orobanchaceae Orobanche ludoviciana Louisiana Broom‐rape S2 Orobanchaceae Orobanche uniflora One‐flowered Broom‐rape SU Osmundaceae Osmunda claytoniana Interrupted Fern S3 Oxalidaceae Oxalis dillenii Dillen's Woodsorrel SU Oxalidaceae Oxalis dillenii ssp. dillenii Dillen's Wood‐sorrel SU Oxalidaceae Oxalis montana White Wood‐sorrel SNA Oxalidaceae Oxalis stricta Yellow Wood‐sorrel S4S5 Papaveraceae Argemone mexicana Prickly Poppy SNA Papaveraceae Chelidonium majus Greater Celadine SNA Papaveraceae Eschscholzia californica California Poppy SNA Papaveraceae Papaver rhoeas Corn Poppy SNA Papaveraceae Papaver somniferum Common Poppy SNA Papaveraceae Sanguinaria canadensis Blood‐root S2 Pinaceae Abies balsamea Balsam Fir S5 Pinaceae Larix laricina Tamarack S5 Pinaceae Picea glauca White Spruce S5 Pinaceae Picea mariana Black Spruce S5 Pinaceae Pinus banksiana Jack Pine S5 Pinaceae Pinus resinosa Red Pine S2S3 Pinaceae Pinus strobus Eastern White Pine S2 Pinaceae Pinus sylvestris Scots Pine SNA Plantaginaceae Plantago coronopus Buck's‐horn Plantain SNA Plantaginaceae Plantago elongata Linear‐leaved Plantain S2 Plantaginaceae Plantago elongata ssp. elongata Linear Leaved‐plantain S2 Plantaginaceae Plantago eriopoda Saline Plantain S4 Plantaginaceae Plantago lanceolata Ribgrass SNA Plantaginaceae Plantago major Common Plantain SNA Plantaginaceae Plantago maritima Seaside Plantain S2 Plantaginaceae Plantago media Hoary Plantain SNA Plantaginaceae Plantago patagonica Patagonia Indian‐wheat SU Plantaginaceae Plantago psyllium Flaxseed Plantain SNA Plantaginaceae Plantago rugelii Black‐seed Plantain SNA Plumbaginaceae Armeria maritima Thrift S1 Plumbaginaceae Armeria maritima ssp. sibirica Thrift S1 Poaceae Achnatherum hymenoides Indian Rice Grass S2 Poaceae Achnatherum richardsonii Richardson Needle Grass S1S2 Poaceae Agropyron cristatum Crested Wheat‐grass SNA Poaceae Agropyron cristatum ssp. pectinatum Crested Wheat‐grass SNA Poaceae Agrostis gigantea Redtop SNA Poaceae Agrostis mertensii Northern Bent Grass S3 Poaceae Agrostis scabra Tickle‐grass S5 Poaceae Agrostis scabra var. scabra Tickle‐grass S5 Poaceae Agrostis stolonifera Creeping Bent Grass SNA Poaceae Alopecurus aequalis Short‐awned Foxtail S5 Poaceae Alopecurus arundinaceus Foxtail SNA Poaceae Alopecurus borealis Alpine Foxtail S2 Poaceae Alopecurus pratensis Meadow Foxtail SNA Poaceae Andropogon gerardii Big Bluestem S5 Poaceae Andropogon hallii Sand Bluestem S2S3 Poaceae Arctagrostis latifolia Polar Grass S3 Poaceae Arctagrostis latifolia ssp. latifolia Polar Grass S3 Poaceae Arctophila fulva Pendant Grass S3 Poaceae Aristida purpurea Red Three‐awn S1 Poaceae Aristida purpurea var. longiseta Red Three‐awn S1 Poaceae Avena fatua Wild Oats SNA Poaceae Avena sativa Oats SNA Poaceae Avenula hookeri Hooker's Oat Grass S4 Poaceae Beckmannia syzigachne Slough Grass S5 Poaceae Bouteloua curtipendula Side‐oats Grama S2S3 Poaceae Bouteloua gracilis Blue Grama S4 Poaceae Bromus ciliatus Fringed Brome S5 Poaceae Bromus ciliatus var. ciliatus Canada Brome SNA Poaceae Bromus inermis Smooth Brome SNA Poaceae Bromus japonicus Japanese Chess SNA Poaceae Bromus kalmii Wild Chess S3? Poaceae Bromus porteri Porter's Chess S3? Poaceae Bromus pubescens Canada Brome Grass SNA Poaceae Bromus pumpellianus Awnless or Hungarian Brome S4? Poaceae Bromus squarrosus Corn Brome SNA Poaceae Bromus tectorum Downy Chess SNA Poaceae Buchloe dactyloides Buffalograss S1 Poaceae Calamagrostis canadensis Marsh Reed Grass S5 Poaceae Calamagrostis canadensis var. canadensis Marsh Reed Grass S5 Poaceae Calamagrostis canadensis var. langsdorfii Marsh Reed Grass S4? Poaceae Calamagrostis canadensis var. macouniana Marsh Reed Grass S4? Poaceae Calamagrostis deschampsioides Reed Grass S2 Poaceae Calamagrostis lapponica Reed Grass S2? Poaceae Calamagrostis montanensis Plains Reed Grass S3 Poaceae Calamagrostis purpurascens Purple Reed Grass S2 Poaceae Calamagrostis rubescens Pine Reed Grass SNA Poaceae Calamagrostis stricta Northern reed grass S5 Poaceae Calamagrostis stricta ssp. inexpansa Northern Reed Grass S5 Poaceae Calamagrostis stricta ssp. stricta Narrowspike Reedgrass S5 Poaceae Calamagrostis stricta var. borealis Boreal Reedgrass SU Poaceae Calamagrostis stricta var. stricta Reed Grass S5 Poaceae Calamovilfa longifolia Sand Grass S4 Poaceae Calamovilfa longifolia var. longifolia Sandgrass S4 Poaceae Catabrosa aquatica Water Hairgrass/brookgrass S4? Poaceae Catabrosa aquatica var. aquatica Brook Grass S4? Poaceae Cinna latifolia Slenderwood Grass S5 Poaceae Dactylis glomerata Orchard Grass SNA Poaceae Danthonia intermedia Timber Oat Grass S2? Poaceae Danthonia spicata Poverty Oat Grass S5 Poaceae Deschampsia cespitosa Tufted Hairgrass S5 Poaceae Deschampsia cespitosa ssp. cespitosa Tufted Hair‐grass S5 Poaceae Deschampsia cespitosa ssp. glauca Tufted Hair‐grass S5 Poaceae Dichanthelium acuminatum Soft Millet S4 Poaceae Dichanthelium acuminatum var. fasciculatum Soft Millet S4 Poaceae Dichanthelium acuminatum var. lindheimeri Soft Millet S4 Poaceae Dichanthelium depauperatum Depauperate Panic‐grass S4 Poaceae Dichanthelium leibergii Lieberg's Panic‐grass S4 Poaceae Dichanthelium linearifolium White‐haired Panic‐grass S2 Poaceae Dichanthelium oligosanthes Few‐flowered Panic‐grass SNA Poaceae Dichanthelium oligosanthes var. scribnerianum Few‐flowered Panic‐grass SNA Poaceae Dichanthelium perlongum Long‐stalked Panic Grass S2? Poaceae Dichanthelium wilcoxianum Sand Millet S2 Poaceae Dichanthelium xanthophysum Yellow Panic Grass S4 Poaceae Digitaria ischaemum Smooth Crab Grass SNA Poaceae Digitaria sanguinalis Large Crab Grass SNA Poaceae Distichlis spicata alkali grass S5? Poaceae Dupontia fisheri Fisher's Dupontia S3? Poaceae Echinochloa crus‐galli Barnyard Grass SNA Poaceae Echinochloa crus‐galli var. crus‐galli Barnyard Grass SNA Poaceae Echinochloa frumentacea Barnyard Grass SNA Poaceae Echinochloa muricata Prickly Barnyard Grass SNA Poaceae Echinochloa muricata var. wiegandii Barnyard Grass SNA Poaceae Elymus alaskanus Alaska Wild Rye SU Poaceae Elymus alaskanus ssp. latiglumis Alaska Wild Rye SU Poaceae Elymus canadensis Canada Wild‐rye S5? Poaceae Elymus curvatus Virginia Wild Rye S4 Poaceae Elymus diversiglumis Various‐glumed Wild Rye S2? Poaceae Elymus glaucus Smooth Wild Rye SNA Poaceae Elymus glaucus ssp. glaucus Smooth Wild Rye SNA Poaceae Elymus hystrix Bottle‐brush Grass S2 Poaceae Elymus hystrix var. hystrix Bottle‐brush Grass S2 Poaceae Elymus lanceolatus Northern Wheat Grass S4 Poaceae Elymus lanceolatus ssp. lanceolatus Thickspike Wheatgrass S4 Poaceae Elymus lanceolatus ssp. psammophilus Sand‐dune Wheatgrass S1 Poaceae Elymus repens Quack‐grass SNA Poaceae Elymus trachycaulus Slender Wheat Grass S5 Poaceae Elymus trachycaulus ssp. trachycaulus Slender Wheat Grass S5 Poaceae Elymus virginicus Virginia Wild Rye S4 Poaceae Elymus virginicus var. virginicus Virginia Wild Rye S4 Poaceae Elymus wiegandii Northern Riverbank Wildrye SU Poaceae Elytrigia repens var. repens Quack‐grass SNA Poaceae Eragrostis cilianensis Skunk Grass SNA Poaceae Eragrostis hypnoides Creeping Teal Love Grass S4 Poaceae Eremopoa altaica Siberian Grass SNA Poaceae Eremopyrum triticeum Annual False Wheat Grass SNA Poaceae Festuca brachyphylla Short‐leaved Fescue S3 Poaceae Festuca hallii Plains Rough Fescue S3 Poaceae Festuca prolifera SNR Poaceae Festuca richardsonii Richardson's Fescue S1 Poaceae Festuca rubra Red Fescue S5 Poaceae Festuca saximontana Rocky Mountain Fescue S5 Poaceae Festuca subverticillata Nodding Fescue S1 Poaceae Festuca trachyphylla Hard Fescue SNA Poaceae Festuca viviparoidea SNR Poaceae Festuca viviparoidea ssp. viviparoidea SNR Poaceae Glyceria borealis Northern Manna Grass S5 Poaceae Glyceria canadensis Rattlesnake Grass S1 Poaceae Glyceria grandis Tall Manna Grass S5 Poaceae Glyceria grandis var. grandis Tall Manna Grass S5 Poaceae Glyceria pulchella Graceful Manna Grass S2 Poaceae Glyceria striata Fowl Manna Grass S5 Poaceae Glyceria striata var. striata Fowl Manna Grass SNA Poaceae Glyceria striata var. stricta Fowl Manna Grass S5 Poaceae Hesperostipa comata Spear Grass S4 Poaceae Hesperostipa comata ssp. comata Spear Grass S4 Poaceae Hesperostipa curtiseta Western Porcupine Grass S4 Poaceae Hesperostipa spartea Porcupine Grass S4 Poaceae Hierochloe alpina Holy Grass S2 Poaceae Hierochloe alpina ssp. alpina Holy Grass S2 Poaceae Hierochloe odorata Sweet Grass S5 Poaceae Hierochloe pauciflora Arctic Holy Grass S2 Poaceae Hordeum jubatum Wild Barley S5 Poaceae Hordeum jubatum ssp. intermedium Wild Barley SNA Poaceae Hordeum jubatum ssp. jubatum Wild Barley S5 Poaceae Koeleria macrantha June Grass S5 Poaceae Leersia oryzoides Rice Cutgrass S3? Poaceae Leymus innovatus Hairy Wild Rye S5 Poaceae Leymus mollis Sea Lyme‐grass S2? Poaceae Leymus mollis ssp. mollis Sea Lyme‐grass S2? Poaceae Leymus mollis ssp. villosissimus Sea Lyme‐grass SNA Poaceae Lolium perenne Perennial Rye Grass/common Darnel SNA Poaceae Lolium perenne ssp. multiflorum Italian Rye Grass SNA Poaceae Lolium persicum Hohen Persian Darnel SNA Poaceae Lolium rigidum Wimmera Rye‐grass SNA Poaceae Lolium temulentum Bearded or Poison Darnel SNA Poaceae Milium effusum Millet Grass S2 Poaceae Milium effusum var. cisatlanticum Millet Grass S2 Poaceae Muhlenbergia andina Foxtail Muhly S1 Poaceae Muhlenbergia asperifolia Scratch Grass S4 Poaceae Muhlenbergia cuspidata Prairie Muhly S4 Poaceae Muhlenbergia glomerata Bog Muhly S4 Poaceae Muhlenbergia mexicana Wood Muhly S4 Poaceae Muhlenbergia racemosa Marsh Muhly S4 Poaceae Muhlenbergia richardsonis Mat Muhly S4 Poaceae Nassella viridula Green Needle Grass S3 Poaceae Oryzopsis asperifolia White‐grained Mountain Rice Grass S5 Poaceae Panicum capillare Witch Grass S5 Poaceae Panicum miliaceum Proso Millet SNA Poaceae Panicum virgatum Switch Grass S4 Poaceae Panicum virgatum var. virgatum Switch Grass S4 Poaceae Pascopyrum smithii Western Wheat Grass S4 Poaceae Phalaris arundinacea Reed Canary Grass S5 Poaceae Phalaris canariensis Birdseed or Canary Grass SNA Poaceae Phleum alpinum Mountain Timothy SNR Poaceae Phleum pratense Common Timothy SNA Poaceae Phragmites australis Common Reed S5 Poaceae Piptatherum canadense Canadian Rice‐grass S1 Poaceae Piptatherum micranthum Little‐seed Rice Grass S2 Poaceae Piptatherum pungens Northern Rice Grass S5 Poaceae Poa alpina Alpine Blue Grass S5 Poaceae Poa annua Annual Blue Grass SNA Poaceae Poa arctica Arctic Blue Grass S2? Poaceae Poa arctica ssp. arctica Arctic Blue‐grass SU Poaceae Poa arctica ssp. caespitans Blue‐grass S1? Poaceae Poa arida Plains Blue Grass S4 Poaceae Poa compressa Canada Blue Grass SNA Poaceae Poa cusickii Mutton‐grass S2? Poaceae Poa fendleriana Mutton Grass S2 Poaceae Poa glauca Glaucous Spear‐grass S5 Poaceae Poa nemoralis Wood Blue Grass S5 Poaceae Poa nervosa Wheeler's Blue Grass SNA Poaceae Poa palustris Fowl Blue Grass S5 Poaceae Poa pratensis Kentucky Blue Grass S5 Poaceae Poa secunda SU Poaceae Poa secunda ssp. secunda S1? Poaceae Poa wheeleri Wheeler's Bluegrass SU Poaceae Polypogon monspeliensis Rabbit Foot Grass SNA Poaceae Psathyrostachys juncea Russian Wild Rye SNA Poaceae Puccinellia distans Slender Salt‐meadow Grass SNA Poaceae Puccinellia nutkaensis Salt‐meadow Grass S2 Poaceae Puccinellia nuttalliana Nuttall's Salt‐meadow Grass S5 Poaceae Puccinellia phryganodes Salt‐meadow Grass S3 Poaceae Puccinellia pumila Salt‐meadow Grass SU Poaceae Puccinellia tenella Salt‐meadow Grass SU Poaceae Puccinellia tenella ssp. langeana Salt‐meadow Grass SU Poaceae Puccinellia vaginata Salt‐meadow Grass SU Poaceae Puccinellia vaginata var. paradoxa Salt‐meadow Grass SU Poaceae Puccinellia vaginata var. vaginata Salt‐meadow Grass SU Poaceae Schedonnardus paniculatus Tumble‐grass S2 Poaceae Schedonorus arundinaceus Tall Fescue SNA Poaceae Schizachne purpurascens Purple Oat Grass S5 Poaceae Schizachyrium scoparium Little Bluestem S4 Poaceae Scolochloa festucacea Sprangletop S5 Poaceae Secale cereale Rye SNA Poaceae Setaria italica Italian Rye SNA Poaceae Setaria pumila yellow foxtail SNA Poaceae Setaria verticillata Foxtail Grass SNA Poaceae Setaria viridis Green Foxtail SNA Poaceae Sorghastrum nutans Indian Grass S4 Poaceae Spartina gracilis Alkali Cord Grass S4 Poaceae Spartina pectinata Slough Grass S5 Poaceae Sphenopholis intermedia Slender Wedge Grass S5 Poaceae Sphenopholis obtusata Prairie Wedge Grass S4 Poaceae Sporobolus compositus tall dropseed S1 Poaceae Sporobolus cryptandrus Sand Dropseed S5 Poaceae Sporobolus heterolepis Prairie Dropseed S5? Poaceae Sporobolus neglectus Annual Dropseed S3? Poaceae Torreyochloa pallida Pale Manna Grass S2 Poaceae Torreyochloa pallida var. fernaldii Pale Manna Grass S2 Poaceae Trisetum spicatum Spike Trisetum S4 Poaceae Triticum aestivum Wheat SNA Poaceae Triticum turgidum Pouland Wheat SNA Poaceae Vahlodea atropurpurea Mountain Hairgrass S1 Poaceae x Elyhordeum macounii Macoun's Wildrye SNA Poaceae Zizania palustris Northern Wild Rice S4 Poaceae Zizania palustris var. interior Interior Wild Rice S4 Polemoniaceae Collomia linearis Narrow‐leaved Collomia S5 Polemoniaceae Phlox hoodii Moss Pink S3 Polemoniaceae Phlox pilosa Downy Phlox SNA Polemoniaceae Phlox pilosa ssp. fulgida Downy Phlox SNA Polemoniaceae Phlox subulata Moss Phlox SNA Polygalaceae Polygala paucifolia Fringed Polygala S4 Polygalaceae Polygala senega Seneca Snakeroot S4 Polygalaceae Polygala verticillata Whorled Milkwort S2 Polygalaceae Polygala verticillata var. isocycla Whorled Milkwort S2 Polygalaceae Polygala verticillata var. verticillata Whorled Milkwort SNA Polygonaceae Bistorta vivipara Alpine Bistort S4 Polygonaceae Eriogonum flavum Yellow Eriogonum S3 Polygonaceae Eriogonum flavum var. flavum Yellow Eriogonum S3 Polygonaceae Eriogonum pauciflorum Few‐flower Wild Buckwheat SNA Polygonaceae Fagopyrum esculentum Buckwheat SNA Polygonaceae Fagopyrum tataricum Tartary Buckwheat SNA Polygonaceae Fallopia cilinodis Fringed Black Bindweed S5 Polygonaceae Fallopia convolvulus Black Bindweed SNA Polygonaceae Fallopia japonica var. japonica Japanese Knotweed SNA Polygonaceae Fallopia scandens Climbing False‐buckwheat S4 Polygonaceae Koenigia islandica Island Koenigia S1 Polygonaceae Persicaria amphibia Water Smartweed S5 Polygonaceae Persicaria hydropiper Common Smartweed SNA Polygonaceae Persicaria lapathifolia Pale Smartweed S5 Polygonaceae Persicaria maculosa Spotted Lady's‐thumb SNA Polygonaceae Persicaria pensylvanica Pennsylvania Smartweed SU Polygonaceae Persicaria punctata Dotted Smartweed S4 Polygonaceae Persicaria sagittata Arrow‐leaved Tear‐thumb S3 Polygonaceae Polygonum achoreum Leathery Knotweed S4S5 Polygonaceae Polygonum amphibium var. emersum Water Smartweed S5 Polygonaceae Polygonum amphibium var. stipulaceum Water Smartweed S5 Polygonaceae Polygonum aviculare Prostrate Knotweed SU Polygonaceae Polygonum aviculare ssp. boreale Northern Doorweed S2S3 Polygonaceae Polygonum aviculare ssp. buxiforme Small's Knotweed SU Polygonaceae Polygonum aviculare ssp. depressum Oval‐leaf Knotweed SNA Polygonaceae Polygonum douglasii Douglas Knotweed S4 Polygonaceae Polygonum erectum Erect Knotweed SU Polygonaceae Polygonum fowleri Fowler Knotweed SU Polygonaceae Polygonum hudsonianum SNR Polygonaceae Polygonum lapathifolium var. lapathifolium Green Smartweed S5 Polygonaceae Polygonum lapathifolium var. salicifolium Willow weed S5 Polygonaceae Polygonum punctatum var. confertiflorum Water Smartweed S4 Polygonaceae Polygonum ramosissimum Bushy Knotweed S4 Polygonaceae Polygonum ramosissimum var. prolificum Proliferous Knotweed S4 Polygonaceae Rheum rhabarbarum rhubarb SNA Polygonaceae Rumex acetosa Garden‐sorrel SNA Polygonaceae Rumex acetosella Sheep Sorrel SNA Polygonaceae Rumex arcticus Arctic Sorrel S1 Polygonaceae Rumex britannica Water Dock S4 Polygonaceae Rumex confertus Asiatic Dock SNA Polygonaceae Rumex crispus Yellow or Curled Dock SNA Polygonaceae Rumex fueginus Golden Dock S5 Polygonaceae Rumex longifolius Long‐leaved Dock SNA Polygonaceae Rumex occidentalis Western Dock S5 Polygonaceae Rumex pallidus Seabeach Dock SU Polygonaceae Rumex pseudonatronatus Field Dock SNA Polygonaceae Rumex stenophyllus Narrow‐leaved Field Dock SNA Polygonaceae Rumex triangulivalvis Narrow‐leaved Dock S5 Polygonaceae Rumex venosus Winged S3 Polypodiaceae Polypodium sibiricum Siberian Polypody SU Polypodiaceae Polypodium virginianum Rock Polypody S5 Pontederiaceae Heteranthera dubia Water Star‐grass S2 Portulacaceae Montia fontana Water‐blinks S1 Portulacaceae Montia fontana ssp. fontana Water‐blinks S1 Portulacaceae Montia parvifolia Water‐blinks SU Portulacaceae Portulaca grandiflora Rose‐moss‐of‐garden SNA Portulacaceae Portulaca oleracea Common Purslane SNA Potamogetonaceae Potamogeton alpinus Northern Pondweed S5 Potamogetonaceae Potamogeton amplifolius Large‐leaved Pondweed S2? Potamogetonaceae Potamogeton epihydrus Nuttall's Pondweed S4 Potamogetonaceae Potamogeton foliosus Leafy Pondweed S3S4 Potamogetonaceae Potamogeton foliosus ssp. foliosus Leafy Pondweed S3S4 Potamogetonaceae Potamogeton friesii Fries Pondweed S4 Potamogetonaceae Potamogeton gramineus Various‐leaved Pondweed S5 Potamogetonaceae Potamogeton illinoensis Illinois Pondweed S2 Potamogetonaceae Potamogeton natans Common Floating Pondweed S5 Potamogetonaceae Potamogeton obtusifolius Blunt‐leaved Pondweed S3? Potamogetonaceae Potamogeton praelongus White‐stemmed Pondweed S5 Potamogetonaceae Potamogeton pusillus Small Pondweed S5 Potamogetonaceae Potamogeton pusillus ssp. pusillus Small Pondweed S5 Potamogetonaceae Potamogeton pusillus ssp. tenuissimus Small Pondweed S2 Potamogetonaceae Potamogeton richardsonii Clasping‐leaved Pondweed S5 Potamogetonaceae Potamogeton robbinsii Robbin's Pondweed S2 Potamogetonaceae Potamogeton spirillus Fennel‐leaved Pondweed S2 Potamogetonaceae Potamogeton strictifolius Straightleaf Pondweed S3 Potamogetonaceae Potamogeton subsibiricus Yenissei River Pondweed SNA Potamogetonaceae Potamogeton zosteriformis Eelgrass Pondweed S5 Potamogetonaceae Stuckenia filiformis Filiform Pondweed S5 Potamogetonaceae Stuckenia filiformis ssp. alpina Filiform Pondweed S5? Potamogetonaceae Stuckenia filiformis ssp. occidentalis Filiform Pondweed S5? Potamogetonaceae Stuckenia pectinata Sago Pondweed S5 Potamogetonaceae Stuckenia vaginata Sheathed Pondweed S5 Primulaceae Anagallis minima Chaffweed SNA Primulaceae Androsace occidentalis Western Pygmyflower S4 Primulaceae Androsace septentrionalis Pygmyflower S5 Primulaceae Androsace septentrionalis ssp. puberulenta Pygmyflower S4 Primulaceae Androsace septentrionalis ssp. robusta Pygmyflower SU Primulaceae Androsace septentrionalis ssp. subulifera Pygmyflower SU Primulaceae Dodecatheon pulchellum Pretty Shooting Star S3 Primulaceae Dodecatheon pulchellum ssp. pulchellum Pretty Shooting Star S3 Primulaceae Glaux maritima Sea‐milkwort S4S5 Primulaceae Glaux maritima ssp. maritima Sea‐milkwort S4S5 Primulaceae Lysimachia ciliata Fringed Loosestrife S5 Primulaceae Lysimachia hybrida Lance‐leaf Loosestrife S3 Primulaceae Lysimachia quadriflora Whorled Loosestrife S2 Primulaceae Lysimachia terrestris Yellow Loosestrife S3 Primulaceae Lysimachia thyrsiflora Tufted Loosestrife S5 Primulaceae Primula egaliksensis Greenland Primrose S4 Primulaceae Primula incana Mealy Primrose S4 Primulaceae Primula mistassinica Bird's‐eye‐primrose S5 Primulaceae Primula stricta Erect Primrose S3 Primulaceae Trientalis borealis Northern Starflower S5 Primulaceae Trientalis borealis ssp. borealis Northern Starflower S5 Pteridaceae Cryptogramma acrostichoides Parsley Fern S3S4 Pteridaceae Pellaea atropurpurea Purple‐stem Cliff‐brake SNA Pteridaceae Pellaea gastonyi Gastony's Cliffbrake S1 Pteridaceae Pellaea glabella Purple Cliff‐brake S2 Pteridaceae Pellaea glabella ssp. glabella Smooth Cliffbrake S1? Pteridaceae Pellaea glabella ssp. occidentalis Cliff‐brake S2 Pyrolaceae Chimaphila umbellata Prince's‐pine S4S5 Pyrolaceae Chimaphila umbellata ssp. cisatlantica Prince's‐pine S3 Pyrolaceae Chimaphila umbellata ssp. occidentalis Prince's‐pine S4S5 Pyrolaceae Moneses uniflora One‐flowered Pyrola S5 Pyrolaceae Orthilia secunda One‐sided Pyrola S5 Pyrolaceae Pyrola americana Round‐leaved Pyrola S2 Pyrolaceae Pyrola asarifolia Pink Pyrola S5 Pyrolaceae Pyrola asarifolia ssp. asarifolia Pink Pyrola S5 Pyrolaceae Pyrola chlorantha Greenish‐flowered Wintergreen S5 Pyrolaceae Pyrola elliptica Shinleaf S5 Pyrolaceae Pyrola grandiflora Arctic Pyrola S4 Pyrolaceae Pyrola minor Lesser Wintergreen S3S4 Ranunculaceae Actaea rubra Red Baneberry S5 Ranunculaceae Adonis annua Pheasant's‐eye SNA Ranunculaceae Anemone americana Liverleaf S1 Ranunculaceae Anemone canadensis Canada Anemone S5 Ranunculaceae Anemone cylindrica Thimbleweed S5 Ranunculaceae Anemone multifida Cut‐leaved Anemone S5 Ranunculaceae Anemone multifida var. multifida Cut‐leaved Anemone S5 Ranunculaceae Anemone parviflora Small Wood Anemone S4 Ranunculaceae Anemone patens Prairie crocus S4 Ranunculaceae Anemone quinquefolia Wood Anemone S5 Ranunculaceae Anemone quinquefolia var. bifolia Wood Anemone S5 Ranunculaceae Anemone richardsonii Yellow Anemone S3 Ranunculaceae Anemone virginiana Virginia Anemone S4 Ranunculaceae Anemone virginiana var. alba Riverbank Anemone SNA Ranunculaceae Anemone virginiana var. cylindroidea Virginia Anemone SU Ranunculaceae Aquilegia brevistyla Small‐flowered Columbine S4 Ranunculaceae Aquilegia canadensis Wild Columbine S5 Ranunculaceae Aquilegia vulgaris European columbine SNA Ranunculaceae Caltha natans Floating Marsh‐marigold S3 Ranunculaceae Caltha palustris Marsh Marigold S5 Ranunculaceae Caltha palustris var. palustris Marsh‐marigold S5 Ranunculaceae Clematis ligusticifolia Western Virgin's‐bower S1 Ranunculaceae Clematis occidentalis Purple Clematis SNA Ranunculaceae Clematis occidentalis var. grosseserrata Purple Clematis SNA Ranunculaceae Clematis occidentalis var. occidentalis Purple Clematis SNA Ranunculaceae Clematis tangutica Yellow Clematis SNA Ranunculaceae Clematis virginiana Virgin's‐bower S2 Ranunculaceae Consolida ajacis Rocket‐larkspur SNA Ranunculaceae Coptis trifolia Goldthread S5 Ranunculaceae Delphinium carolinianum Larkspur S1 Ranunculaceae Delphinium carolinianum ssp. virescens Larkspur S1 Ranunculaceae Delphinium elatum Bee Larkspur SNA Ranunculaceae Delphinium glaucum Tall Larkspur SNA Ranunculaceae Myosurus minimus Least Mousetail S1 Ranunculaceae Myosurus minimus ssp. minimus Least Mousetail S1 Ranunculaceae Ranunculus abortivus Kidneyleaf Buttercup S5 Ranunculaceae Ranunculus acris Common Buttercup SNA Ranunculaceae Ranunculus aquatilis White Water Crowfoot S5 Ranunculaceae Ranunculus aquatilis var. diffusus S5 Ranunculaceae Ranunculus cymbalaria Seaside Crowfoot S5 Ranunculaceae Ranunculus cymbalaria var. cymbalaria Seaside Crowfoot S5 Ranunculaceae Ranunculus cymbalaria var. saximontanus Seaside Crowfoot S1S2 Ranunculaceae Ranunculus fascicularis Early Buttercup S1 Ranunculaceae Ranunculus flabellaris Yellow Water Crowfoot S3 Ranunculaceae Ranunculus flammula Creeping Spearwort S5 Ranunculaceae Ranunculus flammula var. ovalis Creeping Spearwort S4 Ranunculaceae Ranunculus flammula var. reptans Creeping spearwort S5 Ranunculaceae Ranunculus gmelinii Small Yellow Water Buttercup S5 Ranunculaceae Ranunculus gmelinii var. gmelinii Small Yellow Water Buttercup SNA Ranunculaceae Ranunculus gmelinii var. limosus Small Yellow Water Buttercup S4 Ranunculaceae Ranunculus gmelinii var. purshii Small Yellow Water Buttercup S4 Ranunculaceae Ranunculus hispidus Hispid Buttercup S2 Ranunculaceae Ranunculus hispidus var. caricetorum Bristly Buttercup S2 Ranunculaceae Ranunculus hyperboreus Boreal Buttercup S1 Ranunculaceae Ranunculus lapponicus Lapland Buttercup S5 Ranunculaceae Ranunculus macounii Macoun's Buttercup S5 Ranunculaceae Ranunculus pallasii Pallas Buttercup S2 Ranunculaceae Ranunculus pedatifidus Northern Buttercup S2 Ranunculaceae Ranunculus pedatifidus var. affinis Northern Buttercup S2 Ranunculaceae Ranunculus pensylvanicus Bristly Crowfoot S5 Ranunculaceae Ranunculus repens Creeping Buttercup SNA Ranunculaceae Ranunculus repens var. glabratus Creeping Buttercup SNA Ranunculaceae Ranunculus rhomboideus Prairie Buttercup S4 Ranunculaceae Ranunculus sceleratus Cursed Crowfoot S5 Ranunculaceae Ranunculus sceleratus var. multifidus Cursed Crowfoot S5 Ranunculaceae Ranunculus sceleratus var. sceleratus Cursed Crowfoot S4 Ranunculaceae Thalictrum dasycarpum Tall or Purple Meadow‐rue S5 Ranunculaceae Thalictrum dioicum Early Meadow‐Rue SU Ranunculaceae Thalictrum revolutum Waxleaf Meadow‐rue S1 Ranunculaceae Thalictrum sparsiflorum Few‐flowered Meadow‐rue S2S3 Ranunculaceae Thalictrum venulosum Veiny Meadow‐rue S5 Resedaceae Reseda alba White Mignonette SNA Resedaceae Reseda lutea Yellow Mignonette SNA Rhamnaceae Ceanothus herbaceus New Jersey Tea S3 Rhamnaceae Ceanothus herbaceus var. pubescens New Jersey Tea S3 Rhamnaceae Frangula alnus Alder‐buckthorn SNA Rhamnaceae Rhamnus alnifolia Alder‐leaved Buckthorn S5 Rhamnaceae Rhamnus cathartica Common Buckthorn SNA Rosaceae Agrimonia gryposepala Common Agrimony S1S2 Rosaceae Agrimonia striata Agrimony S4 Rosaceae Amelanchier alnifolia Saskatoon S5 Rosaceae Amelanchier alnifolia var. alnifolia Saskatoon S5 Rosaceae Amelanchier humilis Juneberry SU Rosaceae Amelanchier sanguinea Round‐leaved Serviceberry SU Rosaceae Amelanchier stolonifera Running Serviceberry SU Rosaceae Amelanchier x wiegandii Wiegand's Serviceberry SU Rosaceae Argentina anserina Silverweed S5 Rosaceae Argentina egedii Cinquefoil S2 Rosaceae Argentina egedii ssp. groenlandica Cinquefoil S2 Rosaceae Chamaerhodos erecta Chamaerhodos S4 Rosaceae Chamaerhodos erecta ssp. nuttallii Chamaerhodos S4 Rosaceae Comarum palustre Marsh Five‐finger S5 Rosaceae Cotoneaster acutifolius Cotoneaster SNA Rosaceae Cotoneaster niger Cotoneaster SNA Rosaceae Crataegus chrysocarpa Round‐leaved Hawthorn S4 Rosaceae Crataegus douglasii Douglas's Hawthorn SNA Rosaceae Crataegus succulenta Long‐spined Hawthorn S4 Rosaceae Dasiphora fruticosa Shrubby Cinquefoil S5 Rosaceae Dasiphora fruticosa ssp. floribunda Shrubby Cinquefoil S5 Rosaceae Dryas integrifolia White Mountain‐avens S3 Rosaceae Fragaria vesca Woodland Strawberry S4S5 Rosaceae Fragaria vesca ssp. americana Woodland Strawberry S4S5 Rosaceae Fragaria virginiana Smooth Wild Strawberry S5 Rosaceae Fragaria virginiana ssp. glauca Smooth Wild Strawberry S5 Rosaceae Fragaria virginiana ssp. grayana Smooth Wild Strawberry S5 Rosaceae Geum aleppicum Yellow Avens S5 Rosaceae Geum canadense White Avens SU Rosaceae Geum macrophyllum Large‐leaved Avens S4S5 Rosaceae Geum macrophyllum var. perincisum Large‐leaved Avens S4S5 Rosaceae Geum rivale Water or Purple Avens S4 Rosaceae Geum triflorum Three‐flowered Avens S4 Rosaceae Geum triflorum var. triflorum Three‐flowered Avens S4 Rosaceae Malus pumila apple SNA Rosaceae Potentilla argentea Silvery Cinquefoil SNA Rosaceae Potentilla arguta White or Tall Cinquefoil S5 Rosaceae Potentilla bimundorum Branched Cinquefoil S4 Rosaceae Potentilla bipinnatifida Prairie Cinquefoil S5 Rosaceae Potentilla concinna Early Cinquefoil S3S4 Rosaceae Potentilla effusa Branched Cinquefoil S3? Rosaceae Potentilla gracilis Fanleaf Cinquefoil S4? Rosaceae Potentilla gracilis var. flabelliformis Graceful Cinquefoil S1 Rosaceae Potentilla gracilis var. gracilis Graceful Cinquefoil SU Rosaceae Potentilla gracilis var. nuttallii Graceful Cinquefoil SU Rosaceae Potentilla hippiana Woolly Cinquefoil S4 Rosaceae Potentilla hippiana var. argyrea Woolly Cinquefoil S4? Rosaceae Potentilla hookeriana Snow Cinquefoil S1 Rosaceae Potentilla hookeriana ssp. chamissonis Snow Cinquefoil S1 Rosaceae Potentilla nana Cinquefoil SNA Rosaceae Potentilla nivea Snow Cinquefoil S1 Rosaceae Potentilla nivea var. nivea Snow Cinquefoil SU Rosaceae Potentilla nivea var. pentaphylla Five‐leaf Snow Cinquefoil SU Rosaceae Potentilla norvegica Rough Cinquefoil S5 Rosaceae Potentilla norvegica ssp. hirsuta Rough Cinquefoil SU Rosaceae Potentilla norvegica ssp. monspeliensis Rough Cinquefoil SU Rosaceae Potentilla norvegica ssp. norvegica Rough Cinquefoil SU Rosaceae Potentilla paradoxa Bushy Cinquefoil S4 Rosaceae Potentilla pensylvanica Pennsylvania Cinquefoil SU Rosaceae Potentilla pensylvanica var. litoralis Prairie Cinquefoil S2S3 Rosaceae Potentilla pensylvanica var. pensylvanica Pennsylvania Cinquefoil SU Rosaceae Potentilla plattensis Low Cinquefoil S2 Rosaceae Potentilla pulchella Pretty Cinquefoil S2 Rosaceae Potentilla pulcherrima Soft Cinquefoil SU Rosaceae Potentilla recta Rough‐fruited Cinquefoil SNA Rosaceae Potentilla rivalis Brook Cinquefoil S4 Rosaceae Potentilla rivalis var. millegrana Brook Cinquefoil S4 Rosaceae Potentilla rivalis var. pentandra Brook Cinquefoil S4 Rosaceae Potentilla rivalis var. rivalis Brook Cinquefoil S4 Rosaceae Prunus americana American Plum S4 Rosaceae Prunus nigra Canada Plum S4 Rosaceae Prunus pensylvanica Pin Cherry S5 Rosaceae Prunus pensylvanica var. pensylvanica Pin Cherry S5 Rosaceae Prunus pumila Sand Cherry S4 Rosaceae Prunus pumila var. besseyi Sand Cherry S4 Rosaceae Prunus pumila var. susquehanae Sand Cherry S4 Rosaceae Prunus serotina Black Cherry SNA Rosaceae Prunus virginiana Choke Cherry S5 Rosaceae Prunus virginiana var. melanocarpa Choke Cherry S4S5 Rosaceae Prunus virginiana var. virginiana Choke Cherry S5 Rosaceae Rosa acicularis Prickly Rose S5 Rosaceae Rosa acicularis ssp. sayi Prickly Rose S5 Rosaceae Rosa arkansana Low Prairie Rose S4 Rosaceae Rosa arkansana var. arkansana Low Prairie Rose S4 Rosaceae Rosa arkansana var. suffulta Low Prairie Rose S4 Rosaceae Rosa blanda Smooth Rose S4 Rosaceae Rosa woodsii Wood's Rose S4 Rosaceae Rosa woodsii var. woodsii Wood's Rose S4 Rosaceae Rosa x dulcissima Rose SNA Rosaceae Rubus arcticus stemless raspberry S5 Rosaceae Rubus arcticus ssp. acaulis Stemless Raspberry S5 Rosaceae Rubus chamaemorus Baked‐apple‐berry S5 Rosaceae Rubus idaeus Wild Red Raspberry S5 Rosaceae Rubus idaeus ssp. strigosus Wild Red Raspberry S5 Rosaceae Rubus pubescens Dewberry S5 Rosaceae Rubus pubescens var. pilosifolius Dewberry S4? Rosaceae Rubus pubescens var. pubescens Dewberry S5 Rosaceae Rubus x paracaulis Raspberry SNA Rosaceae Sibbaldiopsis tridentata Three‐toothed Cinquefoil S5 Rosaceae Sorbaria sorbifolia False Spiraea SNA Rosaceae Sorbus decora Mountain‐ash S4 Rosaceae Spiraea alba Meadowsweet S5 Rosaceae Spiraea alba var. alba Meadowsweet S5 Rosaceae Spiraea alba var. latifolia Meadowsweet SNA Rubiaceae Galium aparine Cleavers SU Rubiaceae Galium boreale Northern Bedstraw S5 Rubiaceae Galium brevipes Small Bedstraw SNA Rubiaceae Galium labradoricum Ladie's Bedstraw S5 Rubiaceae Galium palustre Marsh Bedstraw SU Rubiaceae Galium trifidum Small Bedstraw S5 Rubiaceae Galium trifidum ssp. trifidum Small Bedstraw SNA Rubiaceae Galium triflorum Sweet‐scented Bedstraw S5 Rubiaceae Galium verum Yellow Bedstraw SNA Rubiaceae Houstonia longifolia Long‐leaved Bluets S4S5 Ruppiaceae Ruppia cirrhosa Widgeon‐grass S3 Salicaceae Populus alba White or Silver‐leaved Poplar SNA Salicaceae Populus balsamifera Balsam Poplar S5 Salicaceae Populus balsamifera ssp. balsamifera Balsam Poplar S5 Salicaceae Populus deltoides Cottonwood S4 Salicaceae Populus deltoides ssp. monilifera Cottonwood S4 Salicaceae Populus grandidentata Large‐toothed Aspen S1S2 Salicaceae Populus tremuloides Trembling Aspen S5 Salicaceae Populus x jackii No Common Name SNA Salicaceae Salix alaxensis Alaska Willow S2 Salicaceae Salix alaxensis var. alaxensis Alaska Willow S2 Salicaceae Salix alba White Willow SNA Salicaceae Salix amygdaloides Peach‐leaved Willow S4 Salicaceae Salix arbusculoides Shrubby Willow S3 Salicaceae Salix arctophila Trailing Willow S4 Salicaceae Salix athabascensis Athabasca Willow S3S4 Salicaceae Salix bebbiana Bebb's or Beaked Willow S5 Salicaceae Salix brachycarpa Short‐capsuled Willow S3 Salicaceae Salix calcicola Lime Willow S3 Salicaceae Salix candida Hoary Willow S5 Salicaceae Salix discolor Pussy Willow S5 Salicaceae Salix drummondiana Drummond's Willow SNA Salicaceae Salix eriocephala Heart‐leaved Willow SU Salicaceae Salix exigua Sandbar Willow S5 Salicaceae Salix farriae Willow SNA Salicaceae Salix fragilis Brittle Willow SNA Salicaceae Salix fuscescens Alaska Bog Willow S1S2 Salicaceae Salix glauca Smooth Willow S4? Salicaceae Salix herbacea Dwarf Willow S1S2 Salicaceae Salix humilis Gray Willow S4 Salicaceae Salix humilis var. humilis Gray Willow S4 Salicaceae Salix humilis var. tristis Gray Willow S3? Salicaceae Salix lanata Wooly Willow SNR Salicaceae Salix lucida Shining Willow S5 Salicaceae Salix lucida ssp. lucida Shining Willow S5 Salicaceae Salix lutea Yellow Willow S4 Salicaceae Salix maccalliana Velvet‐fruited Willow S4 Salicaceae Salix myrtillifolia Myrtle‐leaved Willow S5 Salicaceae Salix myrtillifolia var. myrtillifolia Myrtle‐leaved Willow S4 Salicaceae Salix nigra Black Willow SNA Salicaceae Salix pedicellaris Bog Willow S5 Salicaceae Salix pellita Satin Willow S4 Salicaceae Salix pentandra Laurel Willow SNA Salicaceae Salix petiolaris Basket Willow S4 Salicaceae Salix planifolia Tea‐leaved Willow S5 Salicaceae Salix planifolia ssp. planifolia Plane‐leaved Willow S5 Salicaceae Salix prolixa Mackenzie Willow SNA Salicaceae Salix pseudomonticola False Mountain Willow S4S5 Salicaceae Salix pseudomyrsinites Myrtle‐leaved Willow S5 Salicaceae Salix pyrifolia Balsam Willow S5 Salicaceae Salix reticulata Net‐veined Willow S3 Salicaceae Salix scouleriana Scouler Willow S4 Salicaceae Salix serissima Autumn Willow S4 Salicaceae Salix vestita Rock Willow S3 Santalaceae Comandra umbellata Bastard Toadflax S5 Santalaceae Comandra umbellata ssp. pallida Bastard Toadflax S4 Santalaceae Comandra umbellata ssp. umbellata Bastard Toadflax S5 Santalaceae Geocaulon lividum Northern Comandra S5 Sarraceniaceae Sarracenia purpurea Pitcher Plant S5 Sarraceniaceae Sarracenia purpurea ssp. gibbosa Pitcher Plant S5 Saxifragaceae Chrysosplenium americanum American Golden‐saxifrage SNA Saxifragaceae Chrysosplenium iowense Iowa Golden‐saxifrage S1? Saxifragaceae Chrysosplenium tetrandrum Northern Golden‐carpet S2S3 Saxifragaceae Heuchera richardsonii Alumroot S5 Saxifragaceae Mitella diphylla Two‐leaf Bishop's‐cap SNA Saxifragaceae Mitella nuda Mitrewort S5 Saxifragaceae Parnassia glauca Glaucous Grass‐of‐parnassus S4 Saxifragaceae Parnassia kotzebuei Small Grass‐of‐parnassus S4 Saxifragaceae Parnassia palustris grass of parnassus S4 Saxifragaceae Parnassia palustris var. parviflora Small Grass‐of‐parnassus S1 Saxifragaceae Parnassia palustris var. tenuis grass of parnassus S4 Saxifragaceae Saxifraga aizoides Yellow Mountain Saxifrage S2 Saxifragaceae Saxifraga caespitosa Tufted Saxifrage S1 Saxifragaceae Saxifraga cernua Nodding Saxifrage S1S2 Saxifragaceae Saxifraga cespitosa ssp. cespitosa Tufted Saxifrage S1 Saxifragaceae Saxifraga cespitosa ssp. exaratoides Tufted Saxifrage S1 Saxifragaceae Saxifraga hirculus Yellow Marsh Saxifrage S2 Saxifragaceae Saxifraga oppositifolia Purple Mountain Saxifrage S1S2 Saxifragaceae Saxifraga pensylvanica Swamp Saxifrage S1 Saxifragaceae Saxifraga rivularis Alpine Brook Saxifrage S1 Saxifragaceae Saxifraga tricuspidata Three‐toothed Saxifrage S4 Saxifragaceae Saxifraga virginiensis Early Saxifrage S3 Scheuchzeriaceae Scheuchzeria palustris Podgrass S4? Scheuchzeriaceae Scheuchzeria palustris ssp. americana Podgrass S4? Scrophulariaceae Agalinis aspera Rough Purple False‐foxglove S1S2 Scrophulariaceae Agalinis gattingeri Gattinger's Agalinis S1 Scrophulariaceae Agalinis paupercula Small Flowered Gerardia SH Scrophulariaceae Agalinis paupercula var. borealis Small Flowered Gerardia SH Scrophulariaceae Agalinis tenuifolia Narrow‐leaved Gerardia S2S3 Scrophulariaceae Agalinis tenuifolia var. parviflora Narrow‐leaved Gerardia S2S3 Scrophulariaceae Bartsia alpina Velvet Bells S2 Scrophulariaceae Castilleja coccinea Scarlet Paintbrush S5 Scrophulariaceae Castilleja miniata Red Painted‐cup S5 Scrophulariaceae Castilleja raupii Purple Paintbrush S4 Scrophulariaceae Castilleja rhexiifolia An Indian‐paintbrush SNA Scrophulariaceae Castilleja septentrionalis Labrador Indian‐paintbrush S1? Scrophulariaceae Castilleja sessiliflora Downy Painted‐cup S4 Scrophulariaceae Chaenorhinum minus Dwarf Snapdragon SNA Scrophulariaceae Chelone glabra Turtlehead S2S3 Scrophulariaceae Collinsia parviflora Blue‐eyed Mary S1 Scrophulariaceae Cymbalaria muralis Kenilworth Ivy SNA Scrophulariaceae Euphrasia frigida Northern Eyebright S4S5 Scrophulariaceae Euphrasia hudsoniana Eyebright S4 Scrophulariaceae Euphrasia subarctica Arctic Eyebright SU Scrophulariaceae Euphrasia vinacea Eyebright S1 Scrophulariaceae Gratiola neglecta Clammy Hedge‐hyssop S4 Scrophulariaceae Limosella aquatica Madwort S4S5 Scrophulariaceae Linaria dalmatica Broad‐leaved Toad‐flax SNA Scrophulariaceae Linaria vulgaris Butter‐and‐eggs SNA Scrophulariaceae Melampyrum lineare Cow‐wheat S5 Scrophulariaceae Melampyrum lineare var. lineare Cow‐wheat S5 Scrophulariaceae Mimulus glabratus Smooth Monkeyflower S1 Scrophulariaceae Mimulus glabratus var. jamesii Smooth Monkeyflower S1 Scrophulariaceae Mimulus ringens Blue Monkeyflower S4 Scrophulariaceae Odontites vernus Red Bartsia SNA Scrophulariaceae Orthocarpus luteus Owl's‐clover S4 Scrophulariaceae Pedicularis canadensis Wood‐betony S4 Scrophulariaceae Pedicularis canadensis var. canadensis Wood‐betony S4 Scrophulariaceae Pedicularis canadensis var. dobbsii Wood‐betony SU Scrophulariaceae Pedicularis flammea Flame‐coloured Lousewort S2 Scrophulariaceae Pedicularis groenlandica Elephant's‐head S4 Scrophulariaceae Pedicularis labradorica Labrador Lousewort S4 Scrophulariaceae Pedicularis lanceolata Swamp Lousewort S4 Scrophulariaceae Pedicularis lapponica Lapland Lousewort S2S3 Scrophulariaceae Pedicularis macrodonta Muskeg Lousewort S2 Scrophulariaceae Pedicularis sudetica Purple Rattle S3 Scrophulariaceae Penstemon acuminatus Sanddune Beardtongue SNA Scrophulariaceae Penstemon albidus White Beard‐tongue S4 Scrophulariaceae Penstemon gracilis Lilac‐flowered Beard‐tongue S4 Scrophulariaceae Penstemon nitidus Smooth Blue Beard‐tongue S2 Scrophulariaceae Penstemon procerus Slender Beard‐tongue S1? Scrophulariaceae Rhinanthus minor Yellow Rattle S4 Scrophulariaceae Rhinanthus minor ssp. groenlandicus Northern Yellow Rattle S4 Scrophulariaceae Rhinanthus minor ssp. minor Little Yellow‐rattle S4 Scrophulariaceae Scrophularia lanceolata Hare Figwort SNA Scrophulariaceae Scrophularia marilandica Carpenter's Square Figwort SNA Scrophulariaceae Verbascum thapsus Common Mullein SNA Scrophulariaceae Veronica americana American Brooklime S4 Scrophulariaceae Veronica anagallis‐aquatica Brook‐pimpernell S4 Scrophulariaceae Veronica longifolia Spiked‐speedwell SNA Scrophulariaceae Veronica peregrina Neck‐weed S5 Scrophulariaceae Veronica peregrina ssp. xalapensis Neck‐weed S5 Scrophulariaceae Veronica persica Bird's‐eye SNA Scrophulariaceae Veronica polita Speedwell SNA Scrophulariaceae Veronica scutellata Marsh Speedwell S4S5 Scrophulariaceae Veronica serpyllifolia Thyme‐leaved Speedwell SNA Scrophulariaceae Veronica serpyllifolia ssp. serpyllifolia Thyme‐leaved Speedwell SNA Scrophulariaceae Veronicastrum virginicum Culver's‐root S1 Selaginellaceae Selaginella densa Prairie Spike‐moss S3 Selaginellaceae Selaginella rupestris Rock Spike‐moss S4 Selaginellaceae Selaginella selaginoides Northern Spike‐moss S4 Smilacaceae Smilax lasioneura Carrion Flower S4 Solanaceae Hyoscyamus niger Black Henbane SNA Solanaceae Leucophysalis grandiflora Large White‐flowered Ground‐cherry S3 Solanaceae Physalis alkekengi Chinese Lantern Plant SNA Solanaceae Physalis heterophylla Yellow Ground‐cherry SNA Solanaceae Physalis lanceolata Narrow‐leaved Ground Cherry SNA Solanaceae Physalis philadelphica Tomatillo SNA Solanaceae Physalis philadelphica var. immaculata Tomatillo SNA Solanaceae Physalis pubescens Small Yellow Ground‐cherry SNA Solanaceae Physalis virginiana Prairie Ground‐cherry S4 Solanaceae Solanum dulcamara Bittersweet SNA Solanaceae Solanum nigrum SNA Solanaceae Solanum nigrum ssp. nigrum Black Nightshade SNA Solanaceae Solanum physalifolium Hairy Nightshade SNA Solanaceae Solanum ptychanthum Black nightshade SU Solanaceae Solanum rostratum Buffalo‐bur SNA Solanaceae Solanum triflorum Wild Tomato SNA Solanaceae Solanum tuberosum White Potato SNA Sparganiaceae Sparganium americanum American Bur‐reed SNA Sparganiaceae Sparganium angustifolium Narrow‐leaved Bur‐reed S5 Sparganiaceae Sparganium emersum stemless bur‐reed S3? Sparganiaceae Sparganium eurycarpum Broad‐fruited Bur‐reed S5 Sparganiaceae Sparganium fluctuans Floating Bur‐reed SNA Sparganiaceae Sparganium glomeratum Clustered Burreed S1? Sparganiaceae Sparganium hyperboreum Northern Bur‐reed S4 Sparganiaceae Sparganium natans Small Bur‐reed S5 Taxaceae Taxus canadensis Canada Yew S3 Thelypteridaceae Phegopteris connectilis Northern Beech Fern S2 Thelypteridaceae Thelypteris palustris Marsh Fern S4 Thelypteridaceae Thelypteris palustris var. pubescens Marsh Fern S4 Tiliaceae Tilia americana Basswood S4 Typhaceae Typha angustifolia Narrow‐leaved Cat‐tail S4 Typhaceae Typha latifolia Common Cat‐tail S5 Typhaceae Typha x glauca Hybrid Cattail SNA Ulmaceae Celtis occidentalis Hackberry S1 Ulmaceae Ulmus americana American or White Elm S4 Ulmaceae Ulmus pumila Dwarf Elm SNA Urticaceae Laportea canadensis Wood Nettle S4 Urticaceae Parietaria pensylvanica American Pellitory S4 Urticaceae Urtica dioica Stinging Nettle S5 Urticaceae Urtica dioica ssp. gracilis Stinging Nettle S5 Urticaceae Urtica urens Burning Nettle SNA Valerianaceae Valeriana dioica Wood Valerian S4 Valerianaceae Valeriana dioica var. sylvatica Wood Valerian S4 Valerianaceae Valeriana officinalis Common Valerian SNA Verbenaceae Phryma leptostachya Lopseed S3 Verbenaceae Verbena bracteata Bracted Vervain S3 Verbenaceae Verbena hastata Blue Vervain S4 Verbenaceae Verbena urticifolia White Vervain S1 Violaceae Viola adunca Early Blue Violet S5 Violaceae Viola adunca var. adunca Early Blue Violet S5 Violaceae Viola arvensis Wild Pansy SNA Violaceae Viola blanda Sweet White Violet SU Violaceae Viola blanda var. blanda Sweet White Violet SU Violaceae Viola blanda var. palustriformis Sweet White Violet SU Violaceae Viola canadensis Canada Violet S5 Violaceae Viola canadensis var. rugulosa Canada Violet S5 Violaceae Viola conspersa Dog Violet S3? Violaceae Viola cucullata Marsh Blue Violet SNA Violaceae Viola epipsila Violet SU Violaceae Viola epipsila ssp. repens Violet SU Violaceae Viola labradorica Early Blue Violet S5 Violaceae Viola macloskeyi Bog Violet S4S5 Violaceae Viola macloskeyi ssp. pallens Bog Violet S4S5 Violaceae Viola nephrophylla Northern Bog Violet S5 Violaceae Viola nephrophylla var. nephrophylla Northern Bog Violet S5 Violaceae Viola novae‐angliae New England Blue Violet S1 Violaceae Viola nuttallii Yellow Prairie Violet S3S4 Violaceae Viola palustris Marsh Violet S4S5 Violaceae Viola pedatifida Purple Prairie Violet S4 Violaceae Viola pubescens Downy Yellow Violet S4 Violaceae Viola pubescens var. leiocarpon Downy Yellow Violet S4 Violaceae Viola pubescens var. pubescens Downy Yellow Violet SU Violaceae Viola renifolia Kidney‐shaped Violet S5 Violaceae Viola selkirkii Long‐spurred Violet S2 Violaceae Viola septentrionalis Northern Blue Violet SNA Violaceae Viola sororia Wooly Blue Violet S4 Violaceae Viola tricolor Pansy SNA Viscaceae Arceuthobium americanum Pine or Dwarf Mistletoe S4 Viscaceae Arceuthobium pusillum Dwarf Mistletoe S4 Vitaceae Parthenocissus quinquefolia Virginia Creeper S4 Vitaceae Parthenocissus quinquefolia var. quinquefolia Large‐toothed Virginia Creeper S4 Vitaceae Vitis riparia Riverbank Grape S3S4 Zannichelliaceae Zannichellia palustris Horned‐pondweed S3? Zosteraceae Zostera marina Eelgrass S2