Wyoming Natural Diversity Database

Vascular Plant Species of Concern List

The continual compilation and periodic updating has funneled attention on the de facto rarest vascular plant species in Wyoming. The 2012 list profiles the nature of species’ rarity in bullets (range context, number of occurrences, abundance, recent trends and intrinsic vulnerability) that are expanded in species abstracts. The 2012 list contains close to 15% of the state flora and represents an evolution in our understanding. The first Wyoming plant species of concern list was prepared in 1982, based in large part on the information compiled in Dorn (1977). Since that time, over 700 vascular plant species are or have been tracked as species of concern in Wyoming, reflecting discoveries in the state as represented by floristic surveys of the Rocky Mountain Herbarium, species-specific surveys, taxonomic research, and other changes reflected in revisions to the state flora (Dorn 1977, 1988, 1992, 2001) and in updates to the species of concern lists by Robert Lichvar, Hollis Marriott, Walter Fertig, and the current author. The work of maintaining the lists places a premium on collecting and sharing information. New information and questions are always welcome. The 2012 updating process involved use of the rank calculator developed by NatureServe. Further information on the process and conservation considerations are provided in the cover pages that accompany the 2012 list.

Interested persons may access the most recent list update by clicking on the links below.

2012 Wyoming Plant Species of Concern - 644 KB PDF

2012 Wyoming Plant Species of Potential Concern - 83 KB PDF

Dropped Taxa since 2007 & 2012 Wyoming Plant Species of Uncertain Status

Additions to List since 2007

Codes & Definitions

All scientific names follow treatment in Dorn (2001). Users are referred to the table that follows for a merged list of both species of concern and of potential concern that has links to State Species Accounts. The purpose of these abstracts is to highlight status information and include maps, illustrations, and photos of both the species and its habitat. We are in the process of populating and entering species abstracts for all species of concern. This is the most complete information for many species unless they have been addressed in research reports as cited in the list of references at the end of the species abstracts. To access WYNDD reports for species in question, go to the Reports and Publications page. The list below also reflects updates to ranks and status that may not be reflected in the pdf document.

Scientific Name          Common Name	Heritage Ranks	USFWS ESA	WY BLM	USFS
Abies concolor      White fir	G5/S1
Abronia ammophila      Yellowstone sand verbena	G1/S1	NW
Achnatherum nevadense      Nevada needlegrass	G4/S1
Achnatherum scribneri      Scibner's needlegrass	G4/S1
Achnatherum swallenii      Swallen's ricegrass	G3G4/S2
Adiantum aleuticum      Aleutian maidenhair fern	G5?/S1
Adoxa moschatellina      Moschatel	G5/S2			SOLC - Bighorn NF, SOLC - Medicine Bow NF - Thunder Basin NG
Agrostis mertensii      Northern bentgrass	G5/S2
Agrostis oregonensis      Oregon bentgrass	G5/S1
Agrostis rossiae      Ross' bentgrass	G1/S1	NW
Aletes humilis      Larimer aletes	G2G3/SH
Amerorchis rotundifolia      Round-leaved orchid	G5/S1			Region 2 Sensitive
Ammannia robusta      Robust toothcup	G5/S1
Amphicarpaea bracteata      Groundnut	G5/S1
Androsace chamaejasme var. carinata      Sweet-flowered rock jasmine	G5T4/S1S2			Region 4 Sensitive
Anemone lyallii      Lyall's wood anemone	G4/S1
Anemone narcissiflora var. zephyra      Zephyr windflower	G5T4/S1
Antennaria arcuata      Meadow pussytoes	G3/S3		Sensitive	Region 4 Sensitive
Antennaria aromatica      Aromatic pussytoes       Potential Concern	G4/S3
Antennaria flagellaris      Stoloniferous pussytoes	G5?/S2
Antennaria monocephala ssp. angustata      Single-headed pussytoes	G4G5TNR/S2
Aquilegia brevistyla      Small-flower columbine	G5/S1
Aquilegia formosa var. formosa      Crimson columbine	G5T5/S1
Aquilegia laramiensis      Laramie columbine	G2G3/S2S3		Sensitive	Region 2 Sensitive
Arceuthobium douglasii      Douglas fir dwarf-mistletoe	G5/SH
Arctous rubra      Red manzanita	G5/S1
Argyrochosma fendleri      Fendler's false cloak fern	G3/S1
Aristida curtissii      Curtis' three-awn	G5/S1
Aristida oligantha      Prairie three-awn	G5/S1
Arnica angustifolia var. tomentosa      Alpine arnica	G5T5/S1
Arnica lonchophylla      Northern arnica       Potential Concern	G5/S3
Artemisia biennis var. diffusa      Mystery wormwood	G5T1Q/S1
Artemisia porteri      Porter's sagebrush	G2/S2		Sensitive
Asclepias arenaria      Sand milkweed	G5?/S1
Asclepias engelmanniana      Engelmann's milkweed	G5/S1
Asclepias hallii      Hall's milkweed	G3/SH
Asclepias subverticillata      Bedstraw milkweed	G4G5/SH
Asclepias uncialis      Dwarf milkweed	G3G4/SH			Region 2 Sensitive
Aspidotis densa      Indian's dream	G5/S1
Asplenium trichomanes      Maidenhair spleenwort	G5/S1
Asplenium trichomanes-ramosum      Green spleenwort	G4/S2
Aster alpinus var. vierhapperi      Alpine aster	G5T5/S1
Astragalus barrii      Barr's milkvetch       Potential Concern	G3/S3			Region 2 Sensitive
Astragalus bisulcatus var. haydenianus      Hayden's milkvetch	G5T5?/S1
Astragalus coltonii var. moabensis      Moab milkvetch	G4T3?/S2
Astragalus diversifolius      Meadow milkvetch	G2/S2		Sensitive	Region 4 Sensitive
Astragalus drabelliformis      Big Piney milkvetch       Potential Concern	G2G3/S2S3
Astragalus gilviflorus var. purpureus      Dubois milkvetch	G5T2/S2		Sensitive
Astragalus hyalinus var. glabratus      Smooth summer milkvetch	G1/S1
Astragalus jejunus var. articulatus      Hyattville milkvetch	G3T1/S1		Sensitive
Astragalus lentiginosus var. salinus      Sodaville milkvetch	G5T5/S1
Astragalus leptaleus      Park milkvetch	G4/S1			Region 2 Sensitive, SOLC - Targhee NF
Astragalus nelsonianus      Nelson's milkvetch       Potential Concern	G3/S3
Astragalus paysonii      Payson's milkvetch	G3/S2			Region 4 Sensitive
Astragalus platytropis      Broad-keeled milkvetch	G5/S1
Astragalus proimanthus      Precocious milkvetch	G1/S1	NW	Sensitive
Astragalus racemosus var. treleasei      Trelease's racemose milkvetch	G5T2/S2		Sensitive
Astragalus shultziorum      Shultz's milkvetch       Potential Concern	G3Q/S3
Astragalus terminalis      Railhead milkvetch	G3/S2
Astragalus tridactylicus      Three-fingered milkvetch       Potential Concern	G4/S2
Atriplex wolfii      Wolf's orache	G3G4/S1
Bacopa rotundifolia      Roundleaf water-hyssop	G5/S1
Besseya alpina      Alpine kittentails	G4/S1
Besseya plantaginea      White River kittentails	GNR/S1
Boechera crandallii      Crandall's rockcress	G2/S1
Boechera pendulina var. russeola      Daggett rockcress       Potential Concern	G5T3?/S3
Boechera perennans      Perennial rockcress	G5/S1
Boechera pusilla      Small rockcress	G1/S1	C	Sensitive
Boechera selbyi      Selby rockcress	G4?Q/S1
Boechera williamsii var. williamsii      William's rockcress       Potential Concern	G3QT3Q/S3
Botrychium ascendens      Upward-lobe moonwort	G3/S2			Region 2 Sensitive, Region 4 Sensitive
Botrychium campestre      Prairie moonwort	G3G4/S1			Region 2 Sensitive
Botrychium crenulatum      Crenulate moonwort	G3/S1			Region 4 Sensitive
Botrychium hesperium      Western Moonwort	G4/S1
Botrychium lanceolatum var. lanceolatum      Lance-leaved moonwort	G5T4/S2			SOLC - Bighorn NF, SOLC - Medicine Bow NF - Thunder Basin NG
Botrychium lineare      Slender moonwort	G2G3/S1	NW	Sensitive	Region 2 Sensitive
Botrychium minganense      Mingan Island moonwort	G4G5/S2
Botrychium pallidum      Pale moonwort	G3/S1
Botrychium paradoxum      Puzzling moonwort	G3G4/S1			Region 2 Sensitive
Botrychium pinnatum      Northwestern Moonwort	G4?/S1
Botrychium yaaxudakeit      Yakutat moonwort	G3G4/S1
Bouteloua simplex      Mat grama	G5/S1
Braya glabella      Arctic braya	G5/S1			Region 2 Sensitive
Braya humilis      Low braya	G5/S1
Bromus pubescens      Hairy wood brome	G5/SH
Calochortus apiculatus      Pointedtip mariposa-lily	G4/S1
Campanula aparinoides      Marsh bellflower	G5/S1
Carex alopecoidea      Foxtail sedge	G5/S2			Region 2 Sensitive
Carex aperta      Columbian sedge	G4/S1
Carex arcta      Northern clustered sedge	G5/S1
Carex concinna      Beautiful sedge	G5/S1
Carex crawei      Crawe's sedge	G5/S1
Carex diandra      Lesser panicled sedge	G5/S2			Region 2 Sensitive
Carex eburnea      Ebony sedge	G5/S1
Carex egglestonii      Eggleston's sedge	G4/S1
Carex emoryi      Emory's sedge	G5/S1
Carex flava      Yellow sedge	G5/S1
Carex foenea      Bronze sedge	G5/S1
Carex granularis var. haleana      Meadow sedge	G5T4/S2
Carex incurviformis var. danaensis      Incurved sedge	G4G5T3Q/S2
Carex infirminervia      Weakly-nerved sedge	G5/S2
Carex intumescens      Great bladder sedge	G5/S1
Carex laeviculmis      Smooth-stemmed sedge	G5/S1
Carex lenticularis var. dolia      Goose-grass sedge	G5T3/S1
Carex livida      Livid sedge       Potential Concern	G5/S3			Region 2 Sensitive
Carex luzulina var. atropurpurea      Black and purple sedge	G5T4/S2			Region 4 Sensitive
Carex microglochin      False uncinia sedge	G5?/S2
Carex misandra      Shortleaved sedge	G5/S2
Carex nelsonii      Nelson's sedge	G3/S2
Carex occidentalis      Western sedge	G4/S1
Carex oreocharis      Grassyslope sedge	G3/S2
Carex parryana var. unica      Halls sedge	G4?Q/S2
Carex proposita      Smoky Mountain sedge	G4/S1
Carex richardsonii      Richardson's sedge	G5/S2
Carex rosea      Rosy sedge	G5/S1
Carex scirpoidea var. scirpiformis      Canadian single-spike sedge	G5T4Q/S1
Carex scoparia      Broom sedge	G5/S1
Castilleja nivea      Snow paintbrush       Potential Concern	G3/S2
Ceanothus herbaceus      Prairie redroot	G5/S1
Ceanothus martinii      Utah mountain lilac	G4/S1
Celtis occidentalis      Common hackberry	G5/S1
Centunculus minimus      Chaffweed	G5/S1
Cercocarpus ledifolius var. intricatus      Dwarf mountain mahogany	G5/S1
Chamaechaenactis scaposa      Fullstem	G4/S2
Chamaesyce geyeri      Geyer's spurge	G5/S1
Chenopodium incanum var. incanum      Mealy goosefoot	G5T5/S1
Chenopodium watsonii      Watson's goosefoot	G5/S1
Chionophila jamesii      Rocky Mountain snowlover	G4?/S1
Chrysothamnus greenei      Greene rabbitbrush	G5/S1?
Cicuta bulbifera      Bulb-bearing waterhemlock	G5/S1
Circaea lutetiana var. canadensis      Canadian enchanter's nightshade	G5T5/S1
Cirsium aridum      Cedar Rim thistle	G2Q/S2		Sensitive
Cirsium barnebyi      Barneby's Thistle	G3G4/S1
Cirsium canovirens      Gray-green thistle	G4G5/S1
Cirsium foliosum      Leafy thistle	G5/S1
Cirsium ownbeyi      Ownbey's thistle	G3/S2		Sensitive
Clarkia pulchella      Large-flower clarkia	G5?/SH
Cleome multicaulis      Many-stemmed spider-flower	G2G3/S1		Sensitive
Collomia grandiflora      Large-flower collomia	G5/SH
Crassula solieri      Smooth-seed pygmyweed	G4G5/S1
Cryptantha gracilis      Slender cryptantha	G5/S1
Cryptantha rollinsii      Rollins' cryptantha	G3/S1
Cryptantha stricta      Erect cryptantha       Potential Concern	G3/S3
Cryptantha subcapitata      Owl Creek miner's candle	G2/S2		Sensitive
Cryptogramma stelleri      Fragile rock brake	G5/S1
Cuscuta indecora var. neuropetala      Pretty dodder	G5T5/S1
Cuscuta megalocarpa      Big-fruited dodder	G5/S1
Cuscuta occidentalis      Western dodder	G4G5/S1
Cuscuta plattensis      Wyoming dodder	G1Q/S1	NW		Region 2 Sensitive
Cymopterus alpinus      Alpine oreoxis	G4G5/S1
Cymopterus evertii      Evert's waferparsnip	G2G3/S2S3		Sensitive
Cymopterus williamsii      Williams' waferparsnip	G2G3/S2S3		Sensitive
Cyperus acuminatus      Short-point flatsedge	G5/S1
Cyperus bipartitus      Shining flatsedge	G5/S1
Cyperus engelmannii      Engelmann's flatsedge	G4Q/S1
Cyperus erythrorhizos      Red-root flatsedge	G5/S1
Cypripedium fasciculatum      Clustered Lady's-slipper       Potential Concern	G4/S3			Region 4 Sensitive, SOLC - Medicine Bow NF - Thunder Basin NG
Cypripedium montanum      Mountain lady's-slipper	G4/S2			Region 2 Sensitive
Cypripedium parviflorum var. pubescens      Large yellow lady's-slipper	G5T5/S2			Region 2 Sensitive, Region 4 Sensitive
Dalea cylindriceps      Sandsage prairie-clover	G3G4/S2
Dalea enneandra      Nine-anther prairie-clover	G5/S1
Dalea villosa var. villosa      Silky prairie-clover	G5T5/S1
Delphinium ramosum      Mountain larkspur	G4/S1
Deschampsia danthonioides      Annual hairgrass	G5/S1
Descurainia pinnata var. paysonii      Payson's tansymustard	G5T3?/S2
Descurainia torulosa      Wyoming tansymustard	G2/S2	NW	Sensitive	Region 2 Sensitive, Region 4 Sensitive
Dichanthelium linearifolium      Slim-leaf witchgrass	G5/S1
Diphasiastrum complanatum      Ground cedar	G5/S1			Region 2 Sensitive
Dodecatheon jeffreyi ssp. jeffreyi      Jeffrey's shootingstar	G5T3T5/S1
Downingia laeta      Great basin downingia	G5/S1
Draba borealis      Boreal whitlow-grass	G4G5/S2
Draba crassa      Thick-leaf whitlow-grass       Potential Concern	G3G4/S3
Draba fladnizensis      White Arctic Whitlow-grass	G4/S2
Draba glabella      Rock whitlow-grass	G5/SH
Draba globosa      Rockcress whitlow-grass	G3/S2S3			Region 4 Sensitive
Draba juniperina      Uinta whitlow-grass	G2G3/S2
Draba paysonii var. paysonii      Payson's whitlow-grass	G5T3/S2
Draba paysonii var. treleasii      Trelease's whitlow-grass	G5T4T5/S2
Draba pectinipila      Comb-hair whitlow-grass	G1Q/S1
Draba porsildii      Porsild's whitlow-grass	G3G4/S2
Draba spectabilis var. oxyloba      Showy whitlow-grass	G3G4T3Q/SH
Drosera anglica      English sundew       Potential Concern	G5/S3			Region 2 Sensitive
Dryopteris carthusiana      Shield woodfern	G5/S1
Dryopteris expansa      Spreading woodfern	G5/S1
Dulichium arundinaceum      Three-way sedge	G5/S1
Eleocharis bella      Delicate spikerush	G5/S1
Eleocharis flavescens var. thermalis      Warm springs spikerush	G5T2T3Q/S2
Eleocharis ovata      Ovate spikerush	G5/S1
Eleocharis parvula      Small spikerush	G5/S1
Eleocharis tenuis var. borealis      Boreal spikerush	G5/S1S2			Region 2 Sensitive
Elymus simplex var. luxurians      Long-awned alkali wild-rye	G3TNR/S1S2		Sensitive
Elymus simplex var. simplex      Alkali Wildrye       Potential Concern	G3T2/S2
Elymus triticoides      Creeping wildrye	G4G5/SH
Elymus villosus      Hairy wildrye	G5/S1
Ephedra viridis var. viridis      Green Mormon tea	G5T5/SH
Ephedra viridis var. viscida      Cutler's Mormon tea	G5T4T5/S1
Epipactis gigantea      Giant helleborine	G4/S1			Region 2 Sensitive
Equisetum fluviatile      Water horsetail	G5/S1
Equisetum scirpoides      Dwarf scouring rush	G5/S1
Equisetum sylvaticum      Woodland horsetail	G5/S2
Eragrostis hypnoides      Teal love grass	G5/S1
Eriastrum wilcoxii      Wilcox eriastrum	G5/S2
Ericameria discoidea var. linearis      Narrowleaf goldenweed	G4G5T4/S2			Region 4 Sensitive
Ericameria winwardii      Winward's goldenweed	G4G5T1/S1		Sensitive
Erigeron allocotus      Bighorn fleabane       Potential Concern	G3/S2S3
Erigeron compactus var. consimilis      San Rafael daisy	G4G5/S1
Erigeron elatior      Tall fleabane	G4/S2
Erigeron flabellifolius      Fan-leaved fleabane       Potential Concern	G3/S3
Erigeron humilis      Low fleabane	G5/S2
Erigeron lanatus      Woolly fleabane	G3G4/S1			Region 4 Sensitive
Erigeron pinnatisectus      Pinnate fleabane	G4/S2
Eriogonum brevicaule var. canum      Rabbit wild buckwheat	G3G4/S2
Eriogonum corymbosum var. corymbosum      Crisp-leaf buckwheat	G5T5/S1
Eriogonum divaricatum      Divergent buckwheat	G4G5/S1
Eriogonum exilifolium      Slender-leaved wild buckwheat	G3/S2			Region 2 Sensitive
Eriogonum hookeri      Hooker buckwheat	G5/S1
Eriogonum mancum      Mancos buckwheat	G4/S1
Eriogonum pauciflorum var. nebraskense      Nebraska wild buckwheat	G5TNRQ/S1
Eriogonum umbellatum var. cladophorum      Yellowstone sulphur buckwheat	G5T1/S1
Eriophorum callitrix      Sheathed cottongrass	G5/S1
Eriophorum chamissonis      Russet cottongrass       Potential Concern	G5/S3			Region 2 Sensitive
Eriophorum gracile      Slender cottongrass       Potential Concern	G5/S3			Region 2 Sensitive
Eriophorum scheuchzeri      Scheuchzer cottongrass	G5/S2
Eriophorum viridicarinatum      Green keeled cotton-grass	G5/S2
Eritrichium howardii      Howard's forget-me-not	G4/S1
Euphorbia exstipulata      Square-seeded spurge	G5/SH
Euphorbia hexagona      Six-angle spurge	G5/S1
Eustoma grandiflorum      Showy prairie-gentian	G5/S1
Euthamia graminifolia var. major      Flat-top fragrant goldenrod	G5T5/S1
Festuca hallii      Hall's fescue	G4/S2			Region 2 Sensitive
Festuca viviparoidea ssp. krajinae      Northern fescue	G4G5TNR/S1
Filago prolifera      Rabbit tobacco	G5/S1
Fimbristylis puberula var. interior      Hairy fimbry	G5T5/S1
Froelichia gracilis      Slender cottonweed	G5/SH
Galium coloradoense      Colorado bedstraw	G4/S1
Gaura neomexicana var. coloradensis      Colorado butterfly plant	G3T2/S2	LT
Gentiana affinis var. bigelovii      Bigelow's prairie gentian	G5T4/S1
Gentianella propinqua      Four-part gentian	G5/S1
Gentianopsis simplex      Hiker's gentian	G5/S1
Glandularia bipinnatifida      Dakota vervain	G5/S1
Glossopetalon spinescens var. meionandrum      Utah greasebush	G5T3/S1
Gymnocarpium dryopteris      Oak fern	G5/S2
Helianthemum bicknellii      Plains frostweed	G5/S1
Helictotrichon mortonianum      Alpine oatgrass	G4/S1
Hesperochiron californicus      California hesperochiron	G4G5/S1
Hesperostipa neomexicana      New Mexico needlegrass	G4G5/S1
Heterocodon rariflorus      Western pearl-flower	G5/SH
Heterotheca pumila      Little golden-aster	G4/S1
Huperzia haleakalae      Fir clubmoss	G5/S1
Hymenopappus tenuifolius      Chalk-hill woollywhite	G5/SH
Ionactis alpina      Lava aster	G5/S1
Ipomopsis aggregata var. tenuituba      Slender-trumpet ipomopsis	G4G5/S1
Ipomopsis aggregata var. weberi      Weber's ipomopsis	G5T2/SU			Region 2 Sensitive
Ipomopsis crebrifolia      Compact ipomopsis       Potential Concern	G3G4/S3
Ipomopsis longiflora      Long-flowered ipomopsis	G5/S1
Ipomopsis polycladon      Lavender ipomopsis	G4/S1
Ipomopsis spicata var. robruthii      Kirkpatrick's ipomopsis	G5T2/S2
Isoetes echinospora      Spiny-spore quillwort	G5/S1
Isoetes occidentalis      Western quillwort	G4G5/S1
Juncus triglumis var. albescens      Northern white rush	G5T5/S2
Juncus triglumis var. triglumis      Three-flower rush	G5T5/S1
Juncus vaseyi      Vasey's rush	G5?/S1
Kelloggia galioides      Milk kelloggia	G5/S2
Kobresia sibirica      Siberian kobresia	G5/S1
Kobresia simpliciuscula      Simple kobresia	G5/S1			Region 2 Sensitive
Koenigia islandica      Koenigia	G4/S1
Lathyrus eucosmus      Seemly sweet pea	G4G5/S1
Lathyrus lanszwertii var. lanszwertii      Nevada sweet pea	G4G5T4/S1
Lechea intermedia      Narrowleaf pinweed	G5/S1
Lemna gibba      Inflated Duckweed	G4G5/S1
Lemna valdiviana      Pale duckweed	G5/S1
Lepidium integrifolium      Entire-leaved Peppergrass	G2G3/S1	NW	Sensitive
Lesquerella arenosa var. argillosa      Sidesaddle bladderpod	G5T4/S1		Sensitive
Lesquerella carinata var. carinata      Keeled bladderpod	G3G4T3T4/S2
Lesquerella fremontii      Fremont bladderpod	G2/S2		Sensitive	Region 2 Sensitive
Lesquerella macrocarpa      Large-fruited bladderpod	G2/S2		Sensitive
Lesquerella multiceps      Western bladderpod	G3/S1
Lesquerella parvula      Narrowleaved bladderpod	G3?/S2
Lesquerella paysonii      Payson's bladderpod       Potential Concern	G3/S3			Region 4 Sensitive
Lesquerella prostrata      Prostrate bladderpod	G2G3/S2		Sensitive
Liatris lancifolia      Lance-leaf gay-feather	G4/S1
Ligularia bigelovii var. hallii      Bigelow's groundsel	G4?T3T4/S1
Ligusticum tenuifolium      Slender-leaved lovage	G5/S1?
Linanthus watsonii      Watson's prickly-phlox	G3G5/S1
Lipocarpha drummondii      Dwarf rush	G4G5/S1
Listera convallarioides      Broad-leaved twayblade	G5/S2			SOLC - Bighorn NF, SOLC - Black Hills NF, SOLC - Medicine Bow NF - Thunder Basin NG
Lithospermum multiflorum      Many-flowered gromwell	G4/SH
Lobelia siphilitica      Great blue lobelia	G5/S1
Loeflingia squarrosa      Spreading loeflingia	G5/S1
Lomatium attenuatum      Absaroka biscuitroot	G3/S2
Lomatium bicolor var. bicolor      Wasatch biscuitroot       Potential Concern	G4T3T4/S2
Lomatium triternatum var. anomalum      Ternate desert-parsley	G5T4T5/S1
Lomatogonium rotatum      Marsh felwort	G5/S2
Luzula glabrata var. hitchcockii      Smooth woodrush	G5T4/S2
Lycopodium dendroideum      Tree-like clubmoss	G5/S1S2
Lycopus uniflorus      Northern bugleweed	G5/S1
Lysimachia thyrsiflora      Swamp loosestrife	G5/S1
Lythrum alatum var. alatum      Winged loosestrife	G5T5/S1
Machaeranthera bigelovii var. bigelovii      Bigelow's spiny aster	G4G5T3T4/S2
Machaeranthera coloradoensis      Colorado spiny aster	G3/S2			Region 2 Sensitive
Marsilea vestita var. oligospora      Pepperwort	G5/S1
Mentzelia rusbyi      Rusby's blazing star	G4?/S1
Mentzelia sinuata      Leech-leaf mentzelia	G3/S2
Mentzelia speciosa      Jeweled blazing star	G3/S1
Mimulus nanus ssp. nanus      Dwarf purple monkey flower	G5T4/S1
Mimulus rubellus      Ciliolate-toothed monkey flower	G5/S1
Minuartia filiorum      Thread-branch stitchwort	G3G4/S1
Monarda pectinata      Plains lemon bee-balm	G5/S1
Monardella odoratissima var. glauca      Mountain wild-mint	GNR/S1
Montiastrum lineare      Linearleaf miner's-lettuce	G5/S1
Muhlenbergia glomerata      Marsh muhly	G5/S2
Muhlenbergia montana      Mountain muhly	G5/S1
Muhlenbergia torreyi      Ring muhly	G4/S1
Musineon vaginatum      Sheathed musineon	G3G4/S2
Myosotis verna      Spring forget-me-not	G5/S1
Myriophyllum verticillatum      Whorled water milfoil	G5/S2
Najas flexilis      Slender naiad	G5/S1
Najas guadalupensis      Southern naiad	G5/S1
Nothocalais troximoides      False agoseris	G5/S1
Oenothera canescens      Spotted evening primrose	G4G5/S1
Oenothera howardii      Howard's evening primrose	G3G4/S1
Oenothera laciniata      Cut-leaved Evening-primrose	G5/S1
Onoclea sensibilis      Sensitive fern	G5/S1
Oonopsis wardii      Ward's goldenweed       Potential Concern	G3/S3
Ophioglossum pusillum      Adderstongue	G5/S1
Orobanche corymbosa var. corymbosa      Flat-top broomrape	G4T4/S1S2
Orobanche ludoviciana var. arenosa      Louisiana broomrape	G5T5/S1
Oxytheca dendroidea      Tree-like oxytheca	G4/SH
Oxytropis besseyi var. obnapiformis      Maybell locoweed	G5T2/S1
Oxytropis nana      Wyoming locoweed       Potential Concern	G3/S3
Packera crocata      Saffron groundsel	G4/S1?
Packera pseudaurea var. flavula      Streambank groundsel	G5T2T4/S1
Paeonia brownii      Brown's peony	G5/S1
Palafoxia rosea var. macrolepis      Rosy palafoxia	G5T4/S1
Papaver kluanense      Alpine poppy	G4/S2
Parnassia kotzebuei      Kotzebue's grass-of-parnassus       Potential Concern	G5/S2			Region 2 Sensitive
Paronychia jamesii      James' nailwort	G4/S1
Paronychia pulvinata      Rocky Mountain nailwort	G3?/S1
Parrya nudicaulis      Naked-stemmed parrya	G5/S2			Region 4 Sensitive
Pectis angustifolia var. angustifolia      Lemon scent	G4G5TNR/S1
Pedicularis contorta var. ctenophora      Pink coil-beaked lousewort	G5T3/S2
Pedicularis oederi      Oeder's lousewort	G5/S1S2
Pedicularis parryi var. mogollonica      Mogollon lousewort	G5T2T4Q/S1
Pedicularis pulchella      Mountain lousewort       Potential Concern	G3/S2
Pediomelum digitatum      Palm-leaved scurf-pea	G5/S1
Pediomelum linearifolium      Narrowleaf scurf-pea	G4?/S1
Pellaea gastonyi      Gastony's cliff brake	G2G3/S2
Pellaea suksdorfiana      Smooth cliff brake	G5T4?/S1
Penstemon absarokensis      Absaroka beardtongue	G2/S2		Sensitive	Region 2 Sensitive
Penstemon acaulis      Stemless beardtongue	G2/S1		Sensitive	Region 4 Sensitive
Penstemon angustifolius var. caudatus      Narrowleaf beardtongue	G5T4?/S1
Penstemon caryi      Cary's beardtongue       Potential Concern	G3/S3			Region 2 Sensitive
Penstemon cyathophorus      North Park beardtongue	G3/S2
Penstemon gibbensii      Gibbens' beardtongue	G1G2/S1	NW	Sensitive
Penstemon haydenii      Blowout penstemon	G1G2/S1	LE
Penstemon paysoniorum      Payson's Beardtongue       Potential Concern	G3/S3
Penstemon scariosus var. garrettii      Garrett's beardtongue	G4T3/S1
Penstemon watsonii      Watson's beardtongue	G5/SH
Penstemon yampaensis      Yampa beardtongue	G2/S1
Phacelia alba      White phacelia	G4G5/S1
Phacelia demissa      Intermountain phacelia	G5/S1
Phacelia denticulata      Rocky Mountain phacelia	G3/S2
Phacelia glandulosa var. deserta      Desert glandular phacelia	G4T2/S2
Phacelia incana      Western phacelia	G3G4/S1
Phacelia salina      Nelson phacelia	G3?Q/S2
Phacelia tetramera      Tiny phacelia	G4/S1
Philadelphus microphyllus      Little-leaf mock-orange	G5?/S1
Phippsia algida      Ice grass	G5/S1
Phlox albomarginata      White-margined phlox	G4/S1
Phlox diffusa var. scleranthifolia      Diffuse phlox	G5TNR/S1
Phlox opalensis      Opal phlox       Potential Concern	G3/S3
Phlox pungens      Beaver Rim phlox       Potential Concern	G3/S3		Sensitive
Phryma leptostachya      Lopseed	G5/S1
Physalis virginiana      Virginia ground-cherry	G5/S1
Physaria condensata      Tufted twinpod       Potential Concern	G2G3/S2S3		Sensitive
Physaria dornii      Dorn's twinpod	G1/S1	NW	Sensitive
Physaria eburniflora      Devil's Gate twinpod       Potential Concern	G2G3/S3
Physaria lanata      Woolly twinpod	G5T2/S2			Region 2 Sensitive
Physaria saximontana var. saximontana      Rocky Mountain twinpod       Potential Concern	G3T3/S3		Sensitive
Physocarpus alternans      Dwarf ninebark	G4/S1
Pinus albicaulis      Whitebark Pine       Potential Concern	G3G4/S3	C	Sensitive	Region 2 Sensitive
Pinus flexilis      Limber pine       Potential Concern	G4/S4		Sensitive
Platanthera orbiculata      Large roundleaf orchid	G5/S1			Region 2 Sensitive
Polemonium micranthum      Annual polemonium	G5/SH
Polygala verticillata      Whorled milkwort	G5/S1
Polygonatum biflorum      Common solomon's-seal	G5/S1
Polygonum spergulariiforme      Fall knotweed	G5T4?/S1
Polypodium saximontanum      Rocky Mountain polypody	G3?/S1
Polystichum scopulinum      Rock holly fern	G4/SH
Populus deltoides var. wislizeni      Fremont cottonwood	G5T4T5/S1
Porterella carnosula      Western porterella	G4/S1
Potamogeton amplifolius      Large-leaf pondweed	G5/S1S2
Potamogeton diversifolius      Water-thread pondweed	G5/S1
Potamogeton friesii      Fries' pondweed	G5/S2
Potamogeton illinoensis      Illinois pondweed	G5/S1
Potamogeton nodosus      Longleaf pondweed	G5/S1
Potamogeton obtusifolius      Blunt-leaf pondweed	G5/S1
Potamogeton praelongus      White-stem pondweed	G5/S2
Potamogeton robbinsii      Flatleaf pondweed	G5/S2
Potamogeton strictifolius      Strict-leaved pondweed	G5/S1?
Potamogeton zosteriformis      Flatstem pondweed	G5/S1
Potentilla ambigens      Giant cinquefoil	G3/SH
Potentilla hyparctica      Arctic cinquefoil	G4G5/S1
Potentilla multisecta      Deep Creek cinquefoil	GNR/S1
Potentilla subjuga      Twinleaf cinquefoil	G4/S2
Potentilla uniflora      One-flower cinquefoil	G5/S2
Primula egaliksensis      Greenland primrose	G4/S1			Region 2 Sensitive, Region 4 Sensitive, SOLC - Bridger-Teton ND
Prosartes hookeri      Hooker's Fairy Bell	G5/S2
Pseudognaphalium microcephalum var. thermale      White cudweed	G5T4Q/S1
Pyrrocoma carthamoides var. subsquarrosa      Absaroka goldenweed	G4G5T3/S2			Region 2 Sensitive
Pyrrocoma clementis var. clementis      Tranquil goldenweed	G3G4T3T4/S1
Pyrrocoma clementis var. villosa      Hairy tranquil goldenweed	G3G4T2/S2			Region 2 Sensitive
Pyrrocoma crocea var. crocea      Western goldenweed	G4?T4?/S2
Pyrrocoma integrifolia      Entire-leaf goldenweed	G3G4/S1			Region 2 Sensitive
Ranunculus aquatilis var. aquatilis      White water-crowfoot	G5/S1
Ranunculus flabellaris      Yellow water-crowfoot	G5/SH
Ranunculus gelidus      Timberline buttercup	G5/S1			Region 2 Sensitive
Rorippa calycina      Persistent sepal yellowcress       Potential Concern	G3/S3		Sensitive
Rubus acaulis      Northern blackberry	G5/S2			Region 2 Sensitive
Sagittaria latifolia      Broadleaf arrowhead	G5/S1
Salix barrattiana      Barratt willow	G5/S1			Region 2 Sensitive
Salix candida      Hoary willow	G5/S2			Region 2 Sensitive
Salix myrtillifolia      Myrtleleaf Willow	G5/S1			Region 2 Sensitive
Salix serissima      Autumn willow	G4/S1			Region 2 Sensitive
Sambucus nigra ssp. caerulea      Blue Elderberry	G5T5?/S1
Saussurea weberi      Weber's saw-wort	G2G3/S2			Region 4 Sensitive
Saxifraga serpyllifolia var. chrysantha      Golden saxifrage	G4/S2
Scheuchzeria palustris      Pod-grass	G5/S1
Schoenoplectus heterochaetus      Slender bulrush	G5/S1
Schoenoplectus saximontanus      Rocky Mountain bulrush	G5/S1
Schoenoplectus subterminalis      Water bulrush	G4G5/S1
Scirpus pendulus      Rufous bulrush	G5/S1
Scolochloa festucacea      Sprangle-top	G5/S1
Selaginella mutica      Blunt-leaf spike-moss	G4G5/S1
Selaginella rupestris      Ledge spike-moss	G5/S1
Selaginella selaginoides      Low spike-moss	G5/S1			Region 2 Sensitive
Selaginella underwoodii      Underwood's spike-moss	G5?/S1
Selaginella watsonii      Watson's spike-moss	G4/S1
Senecio hydrophiloides      Sweet marsh butterweed	G4G5/S1
Senecio spartioides var. multicapitatus      Many-headed broom groundsel	G5T4T5/S1
Sesuvium verrucosum      Sea-purslane	G5/S1?
Shoshonea pulvinata      Shoshonea	G3/S2		Sensitive	Region 2 Sensitive
Silene douglasii      Douglas' campion	G4/S1
Silene kingii      King's campion	G2G4Q/S2
Silene kingii      King's campion	G2G4QTNR/S2
Silene repens      Creeping campion	G5/S1
Silphium integrifolium var. laeve      Rosinweed	G5T4?/S1
Sisyrinchium idahoense var. idahoense      Idaho blue-eyed grass	G5T4/S1
Sisyrinchium pallidum      Pale blue-eye-grass       Potential Concern	G3/S2S3
Sparganium eurycarpum      Large bur-reed	G5/S1
Sphaeromeria simplex      Laramie false sagebrush	G2/S2		Sensitive
Spiranthes diluvialis      Ute ladies' tresses	G2G3/S1S2	LT
Spirodela polyrhiza      Greater duckweed	G5/S1
Sporobolus heterolepis      Northern dropseed	G5/S1
Stanleya tomentosa var. tomentosa      Hairy prince's-plume       Potential Concern	G4T3/S2
Stephanomeria fluminea      Teton wire-lettuce	G2/S2
Stephanomeria pauciflora      Prairie skeletonplant	G5/S1
Sullivantia hapemanii var. hapemanii      Hapeman's sullivantia       Potential Concern	G3T3/S3
Symphyotrichum molle      Soft aster       Potential Concern	G3/S3			Region 4 Sensitive, SOLC - Bighorn NF
Symphyotrichum porteri      Porter's aster	G3G4/S1
Thelesperma caespitosum      Green river greenthread	G2?/S1	NW	Sensitive	Region 4 Sensitive
Thelesperma pubescens      Uinta greenthread	G2/S1	NW	Sensitive	Region 4 Sensitive
Tonestus pygmaeus      Pygmy goldenweed	G4/S1
Torreyochloa pallida var. fernaldii      Fernald alkali-grass	G5T4Q/S1
Townsendia condensata var. anomala      North Fork Easter-daisy       Potential Concern	G4T3/S3			Region 2 Sensitive
Townsendia florifera      Showy Easter-daisy	G5/SH
Townsendia microcephala      Cedar Mountain Easter-daisy	G1/S1	NW	Sensitive
Tradescantia bracteata      Long-bract spiderwort	G5/S1
Trautvetteria caroliniensis      Carolina tassel-rue	G5/S1
Trichophorum pumilum      Pygmy bulrush	G5/S2
Trifolium barnebyi      Barneby's clover	G1G2/S1S2	NW	Sensitive
Trillium ovatum ssp. ovatum      Western trillium	G5T5/S2
Triodanis holzingeri      Holzinger's Venus' looking-glass	G4/S1
Triodanis leptocarpa      Slim-pod Venus' looking-glass	G5?/S1
Trisetum canescens      Tall trisetum	G5/S1
Triteleia grandiflora      Large-flower triteleia	G4G5/S2			Region 2 Sensitive
Utricularia intermedia      Flatleaf bladderwort	G5/S1
Utricularia minor      Lesser bladderwort       Potential Concern	G5/S3			Region 2 Sensitive
Utricularia ochroleuca      Northern bladderwort	G4?/S2
Vaccinium myrtillus var. oreophilum      Dwarf bilberry	G5T4T5/S1
Viburnum opulus var. americanum      Highbush cranberry	G5T5/S2			Region 2 Sensitive
Viola pedatifida      Prairie violet	G5/S1
Viola renifolia var. brainerdii      Kidney-leaf white violet	G5T5/S1
Xerophyllum tenax      Western beargrass	G5/S1
Yermo xanthocephalus      Desert yellowhead	G1/S1	LT