Michigan's Special Plants

This list presents the Endangered (E), Threatened (T), and Probably Extirpated (X) plant species of Michigan, which are protected under the Endangered Species Act of the State of Michigan (Part 365 of PA 451, 1994 Michigan Natural Resources and Environmental Protection Act). The current list became effective on April 9, 2009, after extensive review by technical advisors to the Michigan Department of Natural Resources and the citizenry of the state.

Also included in this list are plant species of Special Concern. While not afforded legal protection under the Act, many of these species are of concern because of declining or relict populations in the state. Should these species continue to decline, they would be recommended for Threatened or Endangered status. Protection of Special Concern species now, before they reach dangerously low population levels, would prevent the need to list them in the future by maintaining adequate numbers of self-sustaining populations within Michigan. Some other potentially rare species are listed as of Special Concern pending more precise information on their status in the state; when such information becomes available, they could be moved to threatened or endangered status or deleted from the list.

This list was produced by the Endangered Species Program of the Michigan Department of Natural Resources and the Michigan Natural Features Inventory. English names in common usage or from published sources have been incorporated, when possible, to promote public understanding of and participation in the Endangered Species Program. To comment on the list or request additional copies, or for information on the Endangered Species Program, contact the Endangered Species Coordinator, Wildlife Division, Michigan Department of Natural Resources, P.O. Box 30028, Lansing, MI 48909 (517-373-1263). To report occurrences of these species, please contact us.

The special plants list is also available as a PDF document.

Scientific Name	Common Name	Family	US Status	State Status	Global Rank	State Rank	More Information
Piperia unalascensis	Alaska orchid	Orchidaceae		SC	G5	S2S3	Summary
Potamogeton confervoides	Alga pondweed	Potamogetonaceae		SC	G4	S3	Summary Abstract
Prunus alleghaniensis var. davisii	Alleghany or Sloe plum	Rosaceae		SC	G4T3Q	S3	Summary Abstract
Polygonum viviparum	Alpine bistort	Polygonaceae		T	G5	S1S2	Summary Abstract
Vaccinium uliginosum	Alpine blueberry	Ericaceae		T	G5	S2	Summary
Poa alpina	Alpine bluegrass	Poaceae		T	G5	S1S2	Summary Abstract
Diphasiastrum alpinum	Alpine clubmoss	Lycopodiaceae		X	G5	SX	Summary
Hedysarum alpinum	Alpine sainfoin	Fabaceae		E	G5	S1	Summary
Myriophyllum alterniflorum	Alternate-leaved water-milfoil	Haloragaceae		SC	G5	S2S3	Summary
Castanea dentata	American chestnut	Fagaceae		E	G4	S1S2	Summary
Leymus mollis	American dune wild-rye	Poaceae		SC	G5	S3	Summary Abstract
Nelumbo lutea	American lotus	Nelumbonaceae		T	G4	S2	Summary
Cryptogramma acrostichoides	American rock-brake	Pteridaceae		T	G5	S2	Summary
Littorella uniflora	American shore-grass	Plantaginaceae		SC	G5	S2S3	Summary
Gratiola virginiana	Annual hedge hyssop	Scrophulariaceae		T	G5	S1	Summary Abstract
Sagittaria montevidensis	Arrowhead	Alismataceae		T	G4G5	S1S2	Summary
Draba cana	Ashy whitlow grass	Brassicaceae		T	G5	S1	Summary
Carex assiniboinensis	Assiniboia sedge	Cyperaceae		T	G4G5	S2	Summary Abstract
Sisyrinchium atlanticum	Atlantic blue-eyed-grass	Iridaceae		T	G5	S2	Summary
Listera auriculata	Auricled twayblade	Orchidaceae		SC	G3G4	S2S3	Summary
Callitriche hermaphroditica	Autumnal water-starwort	Callitrichaceae		SC	G5	S2	Summary
Subularia aquatica	Awlwort	Brassicaceae		E	G5	S1	Summary
Houstonia caerulea	Azure bluet	Rubiaceae		X	G5	SX	Summary
Rhynchospora scirpoides	Bald-rush	Cyperaceae		T	G4	S2	Summary
Trichostema dichotomum	Bastard pennyroyal	Lamiaceae		T	G5	S2	Summary Abstract
Juncus militaris	Bayonet rush	Juncaceae		T	G4	S1	Summary
Aristida tuberculosa	Beach three-awned grass	Poaceae		E	G5	S1	Summary
Diarrhena obovata	Beak grass	Poaceae		T	G4G5	S2
Agrimonia rostellata	Beaked agrimony	Rosaceae		T	G5	S2	Summary
Penstemon calycosus	Beard tongue	Scrophulariaceae		T	G5	S2	Summary Abstract
Galium kamtschaticum	Bedstraw	Rubiaceae		E	G5	S1	Summary
Moehringia macrophylla	Big-leaf sandwort	Caryophyllaceae		T	G4	S1	Summary
Empetrum nigrum	Black crowberry	Empetraceae		T	G5	S2	Summary Abstract
Viburnum prunifolium	Black haw	Caprifoliaceae		SC	G5	S3	Summary
Carex nigra	Black sedge	Cyperaceae		E	G5	S1	Summary
Lonicera involucrata	Black twinberry	Caprifoliaceae		T	G4G5T4T5	S2	Summary
Eleocharis melanocarpa	Black-fruited spike-rush	Cyperaceae		SC	G4	S3	Summary Abstract
Utricularia subulata	Bladderwort	Lentibulariaceae		T	G5	S1	Summary Abstract
Lactuca pulchella	Blue lettuce	Asteraceae		X	G5T5	SX	Summary
Elymus glaucus	Blue wild-rye	Poaceae		SC	G5	S3	Summary
Sisyrinchium hastile	Blue-eyed-grass	Iridaceae		X	GUGHQ	SX?	Summary Abstract
Sisyrinchium strictum	Blue-eyed-grass	Iridaceae		SC	G2Q	S2	Summary
Agropyron spicatum	Bluebunch wheatgrass	Poaceae		X	G5	SX	Summary
Buchnera americana	Bluehearts	Scrophulariaceae		X	G5?	SX	Summary
Woodsia obtusa	Blunt-lobed woodsia	Dryopteridaceae		T	G5	S1S2	Summary
Poa paludigena	Bog bluegrass	Poaceae		T	G3	S2	Summary
Gillenia trifoliata	Bowman's root	Rosaceae		E	G4G5	S1	Summary
Lithospermum latifolium	Broad-leaved puccoon	Boraginaceae		SC	G4	S2	Summary
Carex platyphylla	Broad-leaved sedge	Cyperaceae		E	G5	S1	Summary Abstract
Orobanche fasciculata	Broomrape	Orobanchaceae		T	G4	S2	Summary Abstract
Carex scirpoidea	Bulrush sedge	Cyperaceae		T	G5	S2	Summary
Pinguicula vulgaris	Butterwort	Lentibulariaceae		SC	G5	S3	Summary Abstract
Calypso bulbosa	Calypso or fairy-slipper	Orchidaceae		T	G5	S2	Summary Abstract
Oryzopsis canadensis	Canada rice grass	Poaceae		T	G5	S2	Summary Abstract
Sanguisorba canadensis	Canadian burnet	Rosaceae		E	G5	S1	Summary
Astragalus canadensis	Canadian milk vetch	Fabaceae		T	G5	S1S2	Summary
Poa canbyi	Canbyi's bluegrass	Poaceae		E	G4G5	S1	Summary
Polygonum careyi	Carey's smartweed	Polygonaceae		T	G4	S1S2	Summary
Carex typhina	Cattail sedge	Cyperaceae		T	G5	S1	Summary
Fimbristylis puberula	Chestnut sedge	Cyperaceae		X	G5	SX	Summary Abstract
Allium schoenoprasum	Chives	Liliaceae		T	G5	S2	Summary
Phlox bifida	Cleft phlox	Polemoniaceae		X	G5?	SX	Summary
Lygodium palmatum	Climbing fern	Schizaeaceae		E	G4	S1	Summary
Adlumia fungosa	Climbing fumitory	Fumariaceae		SC	G4	S3	Summary
Scirpus clintonii	Clinton's bulrush	Cyperaceae		SC	G4	S3	Summary
Silphium laciniatum	Compass plant	Asteraceae		T	G5	S1S2	Summary Abstract
Leucospora multifida	Conobea	Scrophulariaceae		SC	G5	SNR	Summary
Astragalus neglectus	Cooper's milk vetch	Fabaceae		SC	G4	S3	Summary
Valerianella umbilicata	Corn salad	Valerianaceae		T	G3G5	S2	Summary
Tipularia discolor	Cranefly orchid	Orchidaceae		E	G4G5	S1	Summary
Baptisia leucophaea	Cream wild indigo	Fabaceae		E	G4G5T4T5	S1	Summary
Hypericum adpressum	Creeping St. John's-wort	Clusiaceae		T	G3	S1	Summary
Draba reptans	Creeping whitlow grass	Brassicaceae		T	G5	S1	Summary
Polygala cruciata	Cross-leaved milkwort	Polygalaceae		SC	G5	S3	Summary
Silphium perfoliatum	Cup plant	Asteraceae		T	G5	S2	Summary
Berula erecta	Cut-leaved water parsnip	Apiaceae		T	G4G5	S2	Summary
Cyperus acuminatus	Cyperus, Nut grass	Cyperaceae		X	G5	SX	Summary
Carex davisii	Davis's sedge	Cyperaceae		SC	G4	S3	Summary
Oplopanax horridus	Devil's club	Araliaceae		T	G4	S2	Summary
Cuscuta indecora	Dodder	Cuscutaceae		SC	G5	SH	Summary
Cuscuta pentagona	Dodder	Cuscutaceae		SC	G4G5	SH	Summary
Liatris punctata	Dotted blazing star	Asteraceae		X	G5	SX	Summary
Crataegus douglasii	Douglas's hawthorn	Rosaceae		SC	G5	S3S4	Summary
Gentiana puberulenta	Downy gentian	Gentianaceae		E	G4G5	S1	Summary
Trisetum spicatum	Downy oat-grass	Poaceae		SC	G5	S2S3	Summary Abstract
Helianthus mollis	Downy sunflower	Asteraceae		T	G4G5	S2	Summary
Sporobolus clandestinus	Dropseed	Poaceae		E	G5	S1	Summary Abstract
Aster drummondii	Drummond's aster	Asteraceae		T	G5	S2	Summary
Vaccinium cespitosum	Dwarf bilberry	Ericaceae		T	G5	S1S2	Summary Abstract
Echinodorus tenellus	Dwarf burhead	Alismataceae		E	G5?	S1	Summary
Celtis tenuifolia	Dwarf hackberry	Ulmaceae		SC	G5	S3	Summary Abstract
Iris lacustris	Dwarf lake iris	Iridaceae	LT	T	G3	S3	Summary Abstract
Asclepias ovalifolia	Dwarf milkweed	Asclepiadaceae		E	G5?	S1	Summary
Rubus acaulis	Dwarf raspberry	Rosaceae		E	G5T5	S1	Summary
Eleocharis parvula	Dwarf spike-rush	Cyperaceae		E	G5	S1	Summary
Hemicarpha micrantha	Dwarf-bulrush	Cyperaceae		SC	G5	S3	Summary
Tomanthera auriculata	Eared foxglove	Scrophulariaceae		X	G3	SX	Summary
Carex oligocarpa	Eastern few-fruited sedge	Cyperaceae		T	G4	S2	Summary
Valeriana edulis var. ciliata	Edible valerian	Valerianaceae		T	G5T3	S2	Summary
Saxifraga paniculata	Encrusted saxifrage	Saxifragaceae		T	G5	S1	Summary Abstract
Isoetes engelmannii	Engelmann's quilwort	Isoetaceae		E	G4	S1	Summary
Eleocharis engelmannii	Engelmann's spike rush	Cyperaceae		SC	G4G5Q	S2S3	Summary
Drosera anglica	English sundew	Droseraceae		SC	G5	S3	Summary Abstract
Lechea stricta	Erect pinweed	Cistaceae		SC	G4?	S1	Summary
Silene nivea	Evening campion	Caryophyllaceae		T	G4?	SNR	Summary
Euphrasia nemorosa	Eyebright	Scrophulariaceae		T	G5	S1	Summary
Euphrasia hudsoniana	Eyebright	Scrophulariaceae		T	G5?	S1	Summary
Prosartes hookeri	Fairy bells	Liliaceae		E	G5	S2	Summary Abstract
Tofieldia pusilla	False asphodel	Liliaceae		T	G5	S2	Summary
Kuhnia eupatorioides	False boneset	Asteraceae		SC	G5	S2	Summary
Carex lupuliformis	False hop sedge	Cyperaceae		T	G4	S2	Summary
Trichostema brachiatum	False pennyroyal	Lamiaceae		T	G5	S1	Summary
Dalibarda repens	False violet	Rosaceae		T	G5	S1S2	Summary Abstract
Sisyrinchium fuscatum	Farwell's blue-eyed-grass	Iridaceae		X	G5?	SX
Myriophyllum farwellii	Farwell's water milfoil	Haloragaceae		T	G5	S2	Summary
Carex festucacea	Fescue sedge	Cyperaceae		SC	G5	S1	Summary
Scleria pauciflora	Few-flowered nut rush	Cyperaceae		E	G5	S1	Summary Abstract
Cerastium velutinum	Field Chickweed	Caryophyllaceae		X	G5T4?	SX	Summary
Cuscuta campestris	Field dodder	Cuscutaceae		SC	G5	SH	Summary
Huperzia selago	Fir clubmoss	Lycopodiaceae		SC	G5	S3	Summary
Silene virginica	Fire pink	Caryophyllaceae		E	G5	S1	Summary
Eleocharis compressa	Flattened spike rush	Cyperaceae		T	G4	S2	Summary
Erigeron acris	Fleabane	Asteraceae		T	G5	S1S2	Summary
Stellaria crassifolia	Fleshy stitchwort	Caryophyllaceae		E	G5	S1	Summary
Utricularia inflata	Floating bladderwort	Lentibulariaceae		E	G5	S1	Summary
Caltha natans	Floating marsh marigold	Ranunculaceae		T	G5	SNR
Scutellaria ovata	Forest skullcap	Lamiaceae		T	G5	SX	Summary
Aster furcatus	Forked aster	Asteraceae		T	G3	S1	Summary
Opuntia fragilis	Fragile prickly pear	Cactaceae		E	G4G5	S1	Summary
Dryopteris fragrans	Fragrant cliff woodfern	Dryopteridaceae		SC	G5	S3	Summary Abstract
Phacelia franklinii	Franklin's phacelia	Hydrophyllaceae		T	G5	S1	Summary Abstract
Vitis vulpina	Frost grape	Vitaceae		T	G5	S1S2	Summary
Linum sulcatum	Furrowed flax	Linaceae		SC	G5	S2S3	Summary
Agalinis gattingeri	Gattinger's gerardia	Scrophulariaceae		E	G4	S1	Summary Abstract
Hypericum gentianoides	Gentian-leaved St. John's-wort	Clusiaceae		SC	G5	S3	Summary Abstract
Equisetum telmateia	Giant horsetail	Equisetaceae		X	G5	SX	Summary
Panax quinquefolius	Ginseng	Araliaceae		T	G3G4	S2S3	Summary Abstract
Rhynchospora recognita	Globe beak-rush	Cyperaceae		E	G5?	S1	Summary
Ludwigia sphaerocarpa	Globe-fruited seedbox	Onagraceae		T	G5	S1	Summary
Botrychium mormo	Goblin moonwort	Ophioglossaceae		T	G3	S2	Summary Abstract
Hydrastis canadensis	Goldenseal	Ranunculaceae		T	G4	S2	Summary Abstract
Valerianella chenopodiifolia	Goosefoot corn salad	Valerianaceae		T	G5	S1	Summary
Betula populifolia	Gray birch	Betulaceae		SC	G5	S3	Summary
Aster modestus	Great northern aster	Asteraceae		T	G5	S1	Summary Abstract
Asplenium trichomanes-ramosum	Green spleenwort	Aspleniaceae		SC	G4	S3	Summary
Hybanthus concolor	Green violet	Violaceae		SC	G5	S3	Summary
Angelica venenosa	Hairy angelica	Apiaceae		SC	G5	S3	Summary
Pycnanthemum pilosum	Hairy mountain mint	Lamiaceae		T	G5T5	S2	Summary
Scutellaria elliptica	Hairy skullcap	Lamiaceae		SC	G5	S3	Summary
Ruellia humilis	Hairy wild petunia	Acanthaceae		T	G5	S1	Summary
Carex trichocarpa	Hairy-fruited sedge	Cyperaceae		SC	G4	S2	Summary
Schoenoplectus hallii	Hall's bulrush	Cyperaceae		T	G2G3	S2	Summary Abstract
Asplenium scolopendrium var. americanum	Hart's-tongue fern	Aspleniaceae	LT	E	G4T3	S1	Summary Abstract
Dennstaedtia punctilobula	Hay-scented fern	Dennstaedtiaceae		T	G5	S1	Summary
Carex haydenii	Hayden's sedge	Cyperaceae		X	G5	SX	Summary
Arnica cordifolia	Heart-leaved arnica	Asteraceae		E	G5	S1	Summary Abstract
Plantago cordata	Heart-leaved plantain	Plantaginaceae		E	G4	S1	Summary
Gratiola aurea	Hedge-hyssop	Scrophulariaceae		T	G5	S1S2	Summary
Hedyotis nigricans	Hedyotis	Rubiaceae		X	G5	SX	Summary
Potamogeton hillii	Hill's pondweed	Potamogetonaceae		T	G3	S2	Summary Abstract
Cirsium hillii	Hill's thistle	Asteraceae		SC	G3	S3	Summary Abstract
Eupatorium fistulosum	Hollow-stemmed Joe-pye weed	Asteraceae		T	G5?	S1	Summary Abstract
Eleocharis equisetoides	Horsetail spike rush	Cyperaceae		SC	G4	S3	Summary
Solidago houghtonii	Houghton's goldenrod	Asteraceae	LT	T	G3	S3	Summary Abstract
Carex heleonastes	Hudson Bay sedge	Cyperaceae		E	G4	S1	Summary
Erigeron hyssopifolius	Hyssop-leaved fleabane	Asteraceae		T	G5	S1	Summary
Polemonium reptans	Jacob's ladder	Polemoniaceae		T	G5	S2	Summary Abstract
Besseya bullii	Kitten-tails	Scrophulariaceae		E	G3	S1	Summary
Cuscuta polygonorum	Knotweed dodder	Cuscutaceae		SC	G5	S2	Summary
Armoracia lacustris	Lake cress	Brassicaceae		T	G4?	S2	Summary
Tanacetum huronense	Lake Huron tansy	Asteraceae		T	G5T4T5	S3	Summary Abstract
Hymenoxys herbacea	Lakeside daisy	Asteraceae	LT	E	G3	S1	Summary Abstract
Ranunculus lapponicus	Lapland buttercup	Ranunculaceae		T	G5	S1S2	Summary Abstract
Dentaria maxima	Large toothwort	Brassicaceae		T	G5	S1S2	Summary Abstract
Callitriche heterophylla	Large water starwort	Callitrichaceae		T	G5	S1	Summary
Cystopteris laurentiana	Laurentian fragile fern	Dryopteridaceae		SC	G3	S1S2	Summary
Amorpha canescens	Leadplant	Fabaceae		SC	G5	S3	Summary Abstract
Lechea minor	Least pinweed	Cistaceae		X	G5	SX	Summary
Lechea pulchella	Leggett's pinweed	Cistaceae		T	G5	S1S2	Summary
Dichanthelium leibergii	Leiberg's panic grass	Poaceae		T	G5	S2	Summary Abstract
Spiranthes ovalis	Lesser ladies'-tresses	Orchidaceae		T	G5?	S1	Summary
Gymnocarpium robertianum	Limestone oak fern	Dryopteridaceae		T	G5	S2	Summary Abstract
Carex decomposita	Log sedge	Cyperaceae		X	G3	SX	Summary
Tradescantia bracteata	Long-bracted spiderwort	Commelinaceae		X	G5	SX	Summary
Arnica lonchophylla	Longleaf arnica	Asteraceae		E	G4	S1	Summary
Eragrostis capillaris	Love grass	Poaceae		SC	G5	SH	Summary
Braya humilis	Low northern rock cress	Brassicaceae		T	G5	S1	Summary
Paronychia fastigiata	Low-forked chickweed	Caryophyllaceae		X	G5	SX	Summary
Ranunculus macounii	Macoun's buttercup	Ranunculaceae		T	G5	S1	Summary
Dryopteris filix-mas	Male fern	Dryopteridaceae		SC	G5	S3	Summary
Glyceria acutiflora	Manna grass	Poaceae		X	G5	SX	Summary
Onosmodium molle	Marbleweed	Boraginaceae		X	G4G5	SX	Summary
Senecio congestus	Marsh fleabane	Asteraceae		X	G5	SX	Summary
Parnassia palustris	Marsh grass-of-parnassus	Saxifragaceae		T	G5	S2	Summary Abstract
Rhexia mariana	Maryland meadow beauty	Melastomataceae		T	G5T5	S1S2	Summary
Muhlenbergia richardsonis	Mat muhly	Poaceae		T	G5	S2	Summary Abstract
Rhexia virginica	Meadow beauty	Melastomataceae		SC	G5	S3	Summary Abstract
Proserpinaca pectinata	Mermaid-weed	Haloragaceae		E	G5	S1	Summary Abstract
Mimulus michiganensis	Michigan monkey flower	Scrophulariaceae	LE	E	G5T1	S1	Summary Abstract
Mikania scandens	Mikania	Asteraceae		X	G5	SX	Summary
Solidago missouriensis	Missouri goldenrod	Asteraceae		T	G5	S2	Summary
Arabis missouriensis var. deamii	Missouri rock-cress	Brassicaceae		SC	G5?QT3?Q	S2	Summary
Botrychium acuminatum	Moonwort	Ophioglossaceae		E	G1	S1	Summary Abstract
Juncus stygius	Moor rush	Juncaceae		T	G5	S1S2	Summary
Vaccinium vitis-idaea	Mountain cranberry	Ericaceae		E	G5	S1	Summary
Huperzia appalachiana	Mountain fir-moss	Lycopodiaceae		SC	G4G5	S2	Summary
Pycnanthemum muticum	Mountain mint	Lamiaceae		T	G5	S1	Summary
Phleum alpinum	Mountain timothy	Poaceae		X	G5	SX	Summary
Dasistoma macrophylla	Mullein-foxglove	Scrophulariaceae		E	G4	S1	Summary
Betula murrayana	Murray birch	Betulaceae		SC	G1Q	S1	Summary
Gentiana linearis	Narrow-leaved gentian	Gentianaceae		T	G4G5	S2	Summary
Lithospermum incisum	Narrow-leaved puccoon	Boraginaceae		X	G5	SX	Summary
Calamagrostis stricta	Narrow-leaved reedgrass	Poaceae		T	G5	S1	Summary
Woodwardia areolata	Netted chain-fern	Blechnaceae		X	G5	SX	Summary
Scleria reticularis	Netted nut rush	Cyperaceae		T	G4	S2	Summary
Carex novae-angliae	New England sedge	Cyperaceae		T	G5	S1	Summary
Viola novae-angliae	New England violet	Violaceae		T	G4Q	S2	Summary
Prosartes maculata	Nodding mandarin	Liliaceae		X	G3G4	SX	Summary
Triphora trianthophora	Nodding pogonia or three birds orchid	Orchidaceae		T	G3G4	S1	Summary
Prenanthes crepidinea	Nodding rattlesnake-root	Asteraceae		T	G4	SNR
Lycopodiella subappressa	Northern appressed clubmoss	Lycopodiaceae		SC	G2	S2	Summary Abstract
Myrica pensylvanica	Northern bayberry	Myricaceae		T	G5	S2	Summary
Prosartes trachycarpa	Northern fairy bells	Liliaceae		T	G5	S1	Summary
Ribes oxyacanthoides	Northern gooseberry	Grossulariaceae		SC	G5	S3	Summary
Viola epipsila	Northern marsh violet	Violaceae		E	G4	SH	Summary
Gymnocarpium jessoense	Northern oak fern	Dryopteridaceae		E	G5	S1	Summary
Lycopodiella margueritae	Northern prostrate clubmoss	Lycopodiaceae		T	G2	S2	Summary
Senecio indecorus	Northern ragwort	Asteraceae		T	G5	S1	Summary Abstract
Calamagrostis lacustris	Northern reedgrass	Poaceae		T	G3Q	S1	Summary
Woodsia alpina	Northern woodsia	Dryopteridaceae		E	G4	S1	Summary
Platanthera ciliaris	Orange- or yellow-fringed orchid	Orchidaceae		E	G5	S1S2	Summary Abstract
Trillium undulatum	Painted trillium	Liliaceae		E	G5	S1S2	Summary Abstract
Geum virginianum	Pale avens	Rosaceae		SC	G5	S1S2	Summary
Penstemon pallidus	Pale beard tongue	Scrophulariaceae		SC	G5	S3	Summary
Lemna valdiviana	Pale duckweed	Lemnaceae		X	G5	SX	Summary
Castilleja septentrionalis	Pale Indian paintbrush	Scrophulariaceae		T	G5	S2S3	Summary Abstract
Botrychium pallidum	pale moonwort	Ophioglossaceae		SC	G3	S3	Summary
Panicum longifolium	Panic grass	Poaceae		T	G4	S2	Summary
Hieracium paniculatum	Panicled hawkweed	Asteraceae		T	G5	S2	Summary Abstract
Bartonia paniculata	Panicled screwstem	Gentianaceae		T	G5	S2	Summary Abstract
Sagina nodosa	Pearlwort	Caryophyllaceae		T	G5	S2	Summary Abstract
Panicum philadelphicum	Philadelphia panic-grass	Poaceae		T	GNR	S2	Summary
Pterospora andromedea	Pine-drops	Monotropaceae		T	G5	S2	Summary Abstract
Polygala incarnata	Pink milkwort	Polygalaceae		X	G5	SX	Summary Abstract
Cirsium pitcheri	Pitcher's thistle	Asteraceae	LT	T	G3	S3	Summary Abstract
Liatris squarrosa	Plains blazing star	Asteraceae		X	G5	SX	Summary
Muhlenbergia cuspidata	Plains muhly	Poaceae		X	G4	SX	Summary
Viola pedatifida	Prairie birdfoot violet	Violaceae		T	G5	S1	Summary
Ranunculus rhomboideus	Prairie buttercup	Ranunculaceae		T	G5	S2	Summary Abstract
Potentilla pensylvanica	Prairie cinquefoil	Rosaceae		T	G5	S1	Summary
Coreopsis palmata	Prairie coreopsis	Asteraceae		T	G5	S2	Summary Abstract
Sporobolus heterolepis	Prairie dropseed	Poaceae		SC	G5	S3	Summary Abstract
Zizia aptera	Prairie golden alexanders	Apiaceae		T	G5	S1S2	Summary
Cacalia plantaginea	Prairie indian-plantain	Asteraceae		SC	G4G5	S3	Summary Abstract
Botrychium campestre	Prairie Moonwort or Dunewort	Ophioglossaceae		T	G3G4	S2	Summary Abstract
Agoseris glauca	Prairie or pale agoseris	Asteraceae		T	G5	S2	Summary Abstract
Polytaenia nuttallii	Prairie parsley	Apiaceae		X	G5	SX	Summary
Geum triflorum	Prairie smoke	Rosaceae		T	G5	S2S3	Summary Abstract
Trillium recurvatum	Prairie trillium	Liliaceae		T	G5	S2S3	Summary Abstract
Platanthera leucophaea	Prairie white-fringed orchid	Orchidaceae	LT	E	G3	S1	Summary Abstract
Saxifraga tricuspidata	Prickly saxifrage	Saxifragaceae		T	G4G5	S2	Summary Abstract
Bromus pumpellianus	Pumpelly's bromegrass	Poaceae		T	G5T4	S2	Summary Abstract
Fraxinus profunda	Pumpkin ash	Oleaceae		T	G4	S2	Summary Abstract
Clematis occidentalis	Purple clematis	Ranunculaceae		SC	G5	S3	Summary Abstract
Pellaea atropurpurea	Purple cliff brake	Pteridaceae		T	G5	S2	Summary Abstract
Echinacea purpurea	Purple coneflower	Asteraceae		X	G4	SX	Summary
Asclepias purpurascens	Purple milkweed	Asclepiadaceae		T	G5?	S2	Summary Abstract
Dalea purpurea	Purple prairie clover	Fabaceae		X	G5	SX	Summary
Eleocharis atropurpurea	Purple spike rush	Cyperaceae		E	G4G5	S1	Summary
Chelone obliqua	Purple turtlehead	Scrophulariaceae		E	G4	S1	Summary
Liparis liliifolia	Purple twayblade	Orchidaceae		SC	G5	S3	Summary Abstract
Antennaria parvifolia	Pussy-toes	Asteraceae		SC	G5	S1	Summary
Nymphaea leibergii	Pygmy water lily	Nymphaeaceae		E	G5	S1	Summary
Filipendula rubra	Queen-of-the-prairie	Rosaceae		T	G4G5	S2	Summary Abstract
Cypripedium arietinum	Ram's head lady's-slipper	Orchidaceae		SC	G3	S3	Summary Abstract
Eryngium yuccifolium	Rattlesnake-master or button snakeroot	Apiaceae		T	G5	S2	Summary
Carex crus-corvi	Raven's-foot sedge	Cyperaceae		E	G5	S1	Summary
Morus rubra	Red mulberry	Moraceae		T	G5	S2	Summary Abstract
Carex richardsonii	Richardson's sedge	Cyperaceae		SC	G4	S3S4	Summary Abstract
Arabis perstellata	Rock cress	Brassicaceae		T	G5	S1	Summary
Draba arabisans	Rock whitlow grass	Brassicaceae		SC	G4	S3	Summary Abstract
Androsace occidentalis	Rock-jasmine	Primulaceae		E	G5	SH	Summary
Chamaerhodos nuttallii var. keweenawensis	Rock-rose	Rosaceae		E	G5T1Q	S1	Summary
Cuscuta glomerata	Rope dodder	Cuscutaceae		SC	G5	SH	Summary
Sabatia angularis	Rosepink	Gentianaceae		T	G5	S2	Summary Abstract
Silphium integrifolium	Rosinweed	Asteraceae		T	G5	S2	Summary
Carex rossii	Ross's sedge	Cyperaceae		T	G5	S2	Summary
Antennaria rosea	Rosy pussytoes	Asteraceae		E	G5	SX	Summary
Festuca scabrella	Rough fescue	Poaceae		T	G5	S2S3	Summary Abstract
Hypericum sphaerocarpum	Round-fruited St. John's-wort	Clusiaceae		E	G5	S1	Summary
Dichanthelium polyanthes	Round-seed panic-grass	Poaceae		E	GNR	S1	Summary Abstract
Potentilla paradoxa	Sand cinquefoil	Rosaceae		T	G5	SU	Summary
Triplasis purpurea	Sand grass	Poaceae		SC	G4G5	S2	Summary
Bromus nottowayanus	Satin brome	Poaceae		SC	G3G5	S3	Summary
Salix pellita	Satiny willow	Salicaceae		SC	G5	S2	Summary
Juncus scirpoides	Scirpus-like rush	Juncaceae		T	G5	S2	Summary Abstract
Ranunculus cymbalaria	Seaside crowfoot	Ranunculaceae		T	G5	S1	Summary
Carex conjuncta	Sedge	Cyperaceae		T	G4G5	S1	Summary
Carex gravida	Sedge	Cyperaceae		X	G5	SX	Summary
Carex albolutescens	Sedge	Cyperaceae		T	G5	S2	Summary
Carex seorsa	Sedge	Cyperaceae		T	G4	S2	Summary
Carex media	Sedge	Cyperaceae		T	G5T5?	S2S3	Summary
Carex tincta	Sedge	Cyperaceae		T	G4G5	S1	Summary
Carex atratiformis	Sedge	Cyperaceae		T	G5	S2	Summary Abstract
Carex squarrosa	Sedge	Cyperaceae		SC	G4G5	S1	Summary
Dodecatheon meadia	Shooting star	Primulaceae		E	G5	S1	Summary Abstract
Rhynchospora nitens	Short-beak beak-rush	Cyperaceae		E	G4?	S1	Summary
Juncus brachycarpus	Short-fruited rush	Juncaceae		T	G4G5	S1S2	Summary Abstract
Cerastium brachypodum	Shortstalk chickweed	Caryophyllaceae		T	G5	S2	Summary
Galearis spectabilis	Showy orchis	Orchidaceae		T	G5	S2	Summary Abstract
Quercus shumardii	Shumard's oak	Fagaceae		SC	G5	S2	Summary
Bouteloua curtipendula	Side-oats grama grass	Poaceae		E	G5	S1	Summary
Agalinis skinneriana	Skinner's gerardia	Scrophulariaceae		E	G3G4	S1	Summary Abstract
Scutellaria incana	Skullcap	Lamiaceae		X	G5	SX	Summary
Scutellaria nervosa	Skullcap	Lamiaceae		E	G5	S1	Summary
Penstemon gracilis	Slender beard tongue	Scrophulariaceae		E	G5	S1	Summary
Commelina erecta	Slender dayflower	Commelinaceae		X	G5	SX	Summary
Digitaria filiformis	Slender finger grass	Poaceae		X	G5	SX	Summary
Glyceria melicaria	Slender manna grass	Poaceae		T	G5	S1	Summary
Eleocharis nitida	Slender spike rush	Cyperaceae		E	G4	S1	Summary
Beckmannia syzigachne	Slough grass	Poaceae		T	G5	S2	Summary
Collinsia parviflora	Small blue-eyed Mary	Scrophulariaceae		T	G5	S2	Summary
Dryopteris celsa	Small log fern	Dryopteridaceae		T	G4	S2	Summary
Eragrostis pilosa	Small love grass	Poaceae		SC	G4	SH	Summary
Amerorchis rotundifolia	Small round-leaved orchis	Orchidaceae		E	G5	S1	Summary Abstract
Scutellaria parvula	Small skullcap	Lamiaceae		T	G4	S2	Summary
Helianthus microcephalus	Small wood sunflower	Asteraceae		X	G5	SX	Summary
Nuphar pumila	Small yellow pond lily	Nymphaeaceae		E	G5T4T5	S1S2	Summary
Luzula parviflora	Small-flowered wood rush	Juncaceae		T	G5	S1	Summary Abstract
Panicum microcarpon	Small-fruited panic-grass	Poaceae		SC	GNR	S2	Summary
Eleocharis microcarpa	Small-fruited spike-rush	Cyperaceae		E	G5	S1	Summary
Isotria medeoloides	Smaller whorled pogonia	Orchidaceae	LT	X	G2	SX	Summary
Smilax herbacea	Smooth carrion-flower	Smilacaceae		SC	G5	S3	Summary
Hibiscus laevis	Smooth rose-mallow	Malvaceae		X	G5	SX	Summary
Ruellia strepens	Smooth ruellia	Acanthaceae		E	G4G5	S1	Summary
Draba glabella	Smooth whitlow grass	Brassicaceae		E	G4G5	S1	Summary
Trillium nivale	Snow trillium	Liliaceae		T	G4	S2	Summary
Gentiana saponaria	Soapwort gentian	Gentianaceae		X	G5	SX	Summary
Ophioglossum vulgatum	Southeastern adder's-tongue	Ophioglossaceae		E	G5	S1	Summary
Botrychium spathulatum	Spatulate moonwort	Ophioglossaceae		T	G3	S2	Summary
Ranunculus ambigens	Spearwort	Ranunculaceae		T	G4	SH	Summary Abstract
Eleocharis radicans	Spike rush	Cyperaceae		X	G5	SX	Summary
Eleocharis geniculata	Spike-rush	Cyperaceae		X	G5	SX
Potamogeton pulcher	Spotted pondweed	Potamogetonaceae		E	G5	S1	Summary
Viburnum edule	Squashberry or mooseberry	Caprifoliaceae		T	G5	S2S3	Summary Abstract
Silene stellata	Starry campion	Caryophyllaceae		T	G5	S2	Summary
Gentianella quinquefolia	Stiff gentian	Gentianaceae		T	G5	S2	Summary
Stellaria longipes	Stitchwort	Caryophyllaceae		SC	G5	S2	Summary Abstract
Carex straminea	Straw sedge	Cyperaceae		E	G5	SH	Summary
Asclepias sullivantii	Sullivant's milkweed	Asclepiadaceae		T	G5	S2	Summary Abstract
Carex inops ssp. heliophila	Sun sedge	Cyperaceae		SC	G5T5	S3	Summary
Lysimachia hybrida	Swamp candles	Primulaceae		X	G5	SX	Summary
Populus heterophylla	Swamp or Black cottonwood	Salicaceae		E	G5	S1	Summary
Osmorhiza depauperata	Sweet Cicely	Apiaceae		T	G5	S2	Summary
Petasites sagittatus	Sweet coltsfoot	Asteraceae		T	G5	S1S2	Summary Abstract
Rudbeckia subtomentosa	Sweet coneflower	Asteraceae		X	G5	SX	Summary
Rhynchospora macrostachya	Tall beakrush	Cyperaceae		SC	G4	S3S4	Summary
Asclepias hirtella	Tall green milkweed	Asclepiadaceae		T	G5	S2	Summary Abstract
Scleria triglomerata	Tall nut rush	Cyperaceae		SC	G5	S3	Summary
Salix planifolia	Tea-leaved willow	Salicaceae		T	G5	SH	Summary
Cystopteris tennesseensis	Tennissee bladder fern	Dryopteridaceae		T	G5	S2	Summary
Aristida dichotoma	Three-awned grass	Poaceae		X	G5	SX	Summary
Aristida longespica	Three-awned grass	Poaceae		T	G5	S2	Summary Abstract
Eleocharis tricostata	Three-ribbed spike rush	Cyperaceae		T	G4	S2	Summary
Schoenoplectus americanus	Three-square bulrush	Cyperaceae		E	G5	S1	Summary
Euphorbia commutata	Tinted spurge	Euphorbiaceae		T	G5	S1	Summary Abstract
Trillium sessile	Toadshade	Liliaceae		T	G4G5	S2S3	Summary
Scirpus torreyi	Torrey's bulrush	Cyperaceae		SC	G5?	S2S3	Summary
Lespedeza procumbens	Trailing bush clover	Fabaceae		X	G5	SX	Summary
Strophostyles helvula	Trailing wild Bean	Fabaceae		SC	G5	S3	Summary
Jeffersonia diphylla	Twinleaf	Berberidaceae		SC	G5	S3	Summary
Draba incana	Twisted whitlow grass	Brassicaceae		T	G5	S1	Summary
Fuirena pumila	Umbrella-grass	Cyperaceae		T	G4	S2
Eupatorium sessilifolium	Upland boneset	Asteraceae		T	G5	S1	Summary
Potamogeton vaseyi	Vasey's pondweed	Potamogetonaceae		T	G4	SH	Summary
Juncus vaseyi	Vasey's rush	Juncaceae		T	G5?	S1S2	Summary Abstract
Oxalis violacea	Violet wood sorrel	Oxalidaceae		X	G5	SX	Summary
Mertensia virginica	Virginia bluebells	Boraginaceae		E	G5	S1S2	Summary
Linum virginianum	Virginia flax	Linaceae		T	G4G5	S2	Summary
Aristolochia serpentaria	Virginia snakeroot	Aristolochiaceae		T	G4	S2	Summary Abstract
Tradescantia virginiana	Virginia spiderwort	Commelinaceae		SC	G5	S2	Summary
Lycopus virginicus	Virginia water-horehound	Lamiaceae		T	G5	S2	Summary
Euonymus atropurpurea	Wahoo	Celastraceae		SC	G5	S3	Summary Abstract
Asplenium rhizophyllum	Walking fern	Aspleniaceae		T	G5	S2S3	Summary Abstract
Asplenium ruta-muraria	Wall-rue	Aspleniaceae		E	G5	S1	Summary
Panicum verrucosum	Warty panic grass	Poaceae		T	G4	S1	Summary
Justicia americana	Water willow	Acanthaceae		T	G5	S2	Summary
Wolffia papulifera	Watermeal	Lemnaceae		T	G4	S1	Summary Abstract
Potamogeton bicupulatus	Waterthread pondweed	Potamogetonaceae		T	G4	S2	Summary
Rumex occidentalis	Western dock	Polygonaceae		E	G5	S1	Summary
Mimulus guttatus	Western monkey flower	Scrophulariaceae		SC	G5	S1	Summary
Botrychium hesperium	Western moonwort	Ophioglossaceae		T	G4	S2	Summary Abstract
Artemisia ludoviciana	Western mugwort	Asteraceae		T	G5	S1	Summary
Aster sericeus	Western silvery aster	Asteraceae		T	G5	S2	Summary
Helianthus hirsutus	Whiskered sunflower	Asteraceae		SC	G5	S3	Summary Abstract
Gentiana flavida	White gentian	Gentianaceae		E	G4	S1	Summary
Solidago bicolor	White goldenrod	Asteraceae		E	G5	S1	Summary
Cypripedium candidum	White lady slipper	Orchidaceae		T	G4	S2	Summary Abstract
Baptisia lactea	White or prairie false indigo	Fabaceae		SC	G4Q	S3	Summary
Pycnanthemum verticillatum	Whorled mountain mint	Lamiaceae		SC	G5	S2	Summary Abstract
Isotria verticillata	Whorled pogonia	Orchidaceae		T	G5	S2	Summary
Phlox ovata	Wideflower phlox	Polemoniaceae		E	G4	S1	Summary
Ruppia maritima	Widgeon grass	Ruppiaceae		T	G5	S1	Summary
Carex wiegandii	Wiegand's sedge	Cyperaceae		SC	G4	S3	Summary
Phaseolus polystachios	Wild bean	Fabaceae		X	G5	SX	Summary
Camassia scilloides	Wild hyacinth	Liliaceae		T	G4G5	S2	Summary
Ceanothus sanguineus	Wild lilac	Rhamnaceae		T	G4G5	S2	Summary Abstract
Danthonia intermedia	Wild oat grass	Poaceae		SC	G5	S1S2	Summary
Chasmanthium latifolium	Wild oats	Poaceae		E	G5	S1	Summary
Ipomoea pandurata	Wild potato vine or man-of-the-earth	Convolvulaceae		T	G5	S2	Summary
Zizania aquatica var. aquatica	Wild rice	Poaceae		T	G5T5	S2S3	Summary Abstract
Phlox maculata	Wild sweet William	Polemoniaceae		T	G5	S1	Summary
Aster praealtus	Willow aster	Asteraceae		SC	G5	S3	Summary
Mimulus alatus	Winged monkey flower	Scrophulariaceae		X	G5	SX	Summary Abstract
Wisteria frutescens	Wisteria	Fabaceae		T	G5	S1	Summary
Gnaphalium sylvaticum	Woodland everlasting	Asteraceae		T	G4	S1	Summary
Lactuca floridana	Woodland lettuce	Asteraceae		T	G5	S2	Summary
Corydalis flavula	Yellow fumewort	Fumariaceae		T	G5	S2	Summary Abstract
Sarracenia pupurea f. heterophylla	Yellow pitcher plant	Sarraceniaceae		T	G5T1T2Q	S1	Summary Abstract
Polymnia uvedalia	Yellow-flowered leafcup	Asteraceae		T	G4G5	S1	Summary Abstract

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