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Wyoming Natural Diversity Database

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Wyoming Natural Diversity Database
1000 E. University Ave.
Department 3381
Laramie, WY 82071
Phone: 307-766-3023
Fax: 307-766-3026
Email: wyndd@uwyo.edu

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 Abstracts. 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 LD    
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 - BGHRN, SOLC - MB-TB
Agrostis mertensii
     Northern bentgrass
G5/S2      
Agrostis oregonensis
     Oregon bentgrass
G4/S1      
Agrostis rossiae
     Ross' bentgrass
G1/S1 LD    
Aletes humilis
     Larimer aletes
G2G3/SH     SOLC - MB-TB
Amerorchis rotundifolia
     Round-leaved orchid
G5/S1     R2
Ammannia robusta
     Robust toothcup
G5/S1      
Amphicarpaea bracteata
     Groundnut
G5/S1      
Androsace chamaejasme var. carinata
     Sweet-flowered rock jasmine
G5T4/S1S2     R4
Anemone lyallii
     Lyall's wood anemone
G4/S1      
Anemone narcissiflora var. zephyra
     Zephyr windflower
G5T4/S1      
Antennaria arcuata
     Meadow pussytoes
G3/S3   BLM R4
Antennaria aromatica
     Aromatic pussytoes
      Potential Concern
G4/S3     SOLC - BGHRN
Antennaria flagellaris
     Stoloniferous pussytoes
G5?/S2      
Antennaria monocephala
     Single-headed pussytoes
G4G5TNR/S2     SOLC - BGHRN
Aquilegia brevistyla
     Small-flower columbine
G5/S1      
Aquilegia formosa var. formosa
     Crimson columbine
G5T5/S1      
Aquilegia laramiensis
     Laramie columbine
G2G3/S2S3   BLM R2
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
G4/S3      
Artemisia biennis var. diffusa
     Mystery wormwood
G5T1Q/S1      
Artemisia porteri
     Porter's sagebrush
G2/S2   BLM  
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     R2
Asclepias verticillata
     Whorled milkweed
G5/S1?      
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     R2
Astragalus bisulcatus var. haydenianus
     Hayden's milkvetch
G5T5?/S1      
Astragalus coltonii var. moabensis
     Moab milkvetch
G4T3?/S2      
Astragalus diversifolius
     Meadow milkvetch
G2/S1   BLM R4
Astragalus drabelliformis
     Big Piney milkvetch
      Potential Concern
G2G3/S2S3      
Astragalus gilviflorus var. purpureus
     Dubois milkvetch
G5T2/S2   BLM  
Astragalus jejunus var. articulatus
     Hyattville milkvetch
G3T1/S1   BLM  
Astragalus lentiginosus var. salinus
     Sodaville milkvetch
G5T5/S1      
Astragalus leptaleus
     Park milkvetch
G4/S1     R2, SOLC - TRG
Astragalus nelsonianus
     Nelson's milkvetch
      Potential Concern
G3/S3      
Astragalus paysonii
     Payson's milkvetch
G3/S2     R4
Astragalus platytropis
     Broad-keeled milkvetch
G5/S1      
Astragalus proimanthus
     Precocious milkvetch
G1/S1 LD BLM  
Astragalus racemosus var. treleasei
     Trelease's racemose milkvetch
G5T2/S2   BLM  
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     SOLC - MB-TB
Besseya plantaginea
     White River kittentails
GNR/S1     SOLC - MB-TB
Boechera crandallii
     Crandall's rockcress
G2G3/S1      
Boechera pendulina var. russeola
     Daggett rockcress
      Potential Concern
G5T3?/S3      
Boechera perennans
     Perennial rockcress
G5/S1      
Boechera pusilla
     Small rockcress
G1/S1 C BLM  
Boechera selbyi
     Selby rockcress
G4?Q/S1      
Boechera williamsii var. williamsii
     William's rockcress
      Potential Concern
G3QT3Q/S3      
Botrychium ascendens
     Upward-lobe moonwort
G2G3/S2     R2, R4
Botrychium campestre
     Prairie moonwort
G3G4/S1     R2
Botrychium crenulatum
     Crenulate moonwort
G3/S1     R4
Botrychium hesperium
     Western Moonwort
G4/S1      
Botrychium lanceolatum var. lanceolatum
     Lance-leaved moonwort
G5T4/S2     SOLC - BGHRN, SOLC - MB-TB
Botrychium lineare
     Slender moonwort
G2?/S1 LD BLM R2
Botrychium minganense
     Mingan Island moonwort
G4/S2     SOLC - BGHRN
Botrychium pallidum
     Pale moonwort
G3/S1      
Botrychium paradoxum
     Puzzling moonwort
G2/S1     R2
Bouteloua simplex
     Mat grama
G5/S1      
Braya glabella
     Arctic braya
G5/S1     R2
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     R2
Carex concinna
     Beautiful sedge
G5/S1     SOLC - MB-TB
Carex crawei
     Crawe's sedge
G5/S1      
Carex diandra
     Lesser panicled sedge
G5/S2     R2
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
G4G5T3/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     R2
Carex luzulina var. atropurpurea
     Black and purple sedge
G5T3/S2     R4
Carex microglochin
     False uncinia sedge
G5?/S2      
Carex misandra
     Shortleaved sedge
G5/S2     SOLC - BGHRN
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   BLM  
Cirsium barnebyi
     Barneby's Thistle
G3G4/S1      
Cirsium canovirens
     Gray-green thistle
G4G5/S1      
Cirsium foliosum
     Leafy thistle
G5/S1     SOLC - BGHRN
Cirsium ownbeyi
     Ownbey's thistle
G3/S2   BLM  
Clarkia pulchella
     Large-flower clarkia
G5?/SH      
Cleome multicaulis
     Many-stemmed spider-flower
G2G3/S1   BLM  
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   BLM  
Cryptogramma stelleri
     Fragile rock brake
G5/S1     SOLC - BGHRN
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 LD   R2
Cymopterus alpinus
     Alpine oreoxis
G4G5/S1      
Cymopterus evertii
     Evert's waferparsnip
G2G3/S2S3   BLM  
Cymopterus williamsii
     Williams' waferparsnip
G2G3/S2S3   BLM  
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     R4, SOLC - MB-TB
Cypripedium montanum
     Mountain lady's-slipper
G4/S2     R2
Cypripedium parviflorum var. pubescens
     Large yellow lady's-slipper
G5T5/S2     R2, R4
Dalea cylindriceps
     Andean 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 LD BLM R2, R4
Dichanthelium linearifolium
     Slim-leaf witchgrass
G5/S1     SOLC - MB-TB
Diphasiastrum complanatum
     Ground cedar
G5/S1     R2
Dodecatheon jeffreyi ssp. jeffreyi
     Jeffrey's shootingstar
G5T3T5/S1      
Downingia laeta
     Great basin downingia
G5/S1      
Draba borealis
     Boreal whitlow-grass
G4/S2     SOLC - BRDGR-TET
Draba crassa
     Thick-leaf whitlow-grass
      Potential Concern
G3G4/S3      
Draba fladnizensis
     White Arctic Whitlow-grass
G4/S2     SOLC - BGHRN
Draba glabella
     Rock whitlow-grass
G4G5/SH      
Draba globosa
     Rockcress whitlow-grass
G3/S2S3     R4
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     SOLC - MB-TB
Drosera anglica
     English sundew
      Potential Concern
G5/S3     R2
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     R2
Elymus simplex var. luxurians
     Long-awned alkali wild-rye
G4?QTNR/S1S2   BLM  
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     R2
Equisetum fluviatile
     Water horsetail
G5/S1      
Equisetum scirpoides
     Dwarf scouring rush
G5/S1      
Equisetum sylvaticum
     Woodland horsetail
G5/S2     SOLC - BGHRN
Eragrostis hypnoides
     Teal love grass
G5/S1      
Eriastrum wilcoxii
     Wilcox eriastrum
G5/S2      
Ericameria discoidea var. linearis
     Narrowleaf goldenweed
G4G5T4/S2     R4
Ericameria winwardii
     Winward's goldenweed
G4G5T1/S1   BLM  
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     SOLC - BGHRN
Erigeron lanatus
     Woolly fleabane
G3G4/S1     R4
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     R2
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     R2
Eriophorum gracile
     Slender cottongrass
      Potential Concern
G5/S3     R2
Eriophorum scheuchzeri
     Scheuchzer cottongrass
G5/S2      
Eriophorum viridicarinatum
     Green keeled cotton-grass
G5/S2      
Eritrichium howardii
     Howard's forget-me-not
G4/S1     SOLC - BGHRN
Euphorbia exstipulata
     Square-seeded spurge
G5/SH      
Euphorbia hexagona
     Six-angle spurge
G5/S1      
Eustoma grandiflorum
     Showy prairie-gentian
GNRT5/S1      
Euthamia graminifolia var. major
     Flat-top fragrant goldenrod
G5T5/S1     SOLC - MB-TB
Festuca hallii
     Hall's fescue
G4/S2     R2
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 T    
Gentiana affinis var. bigelovii
     Bigelow's prairie gentian
G5T4/S1     SOLC - MB-TB
Gentianella propinqua
     Four-part gentian
G5/S1     SOLC - TRG
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     SOLC - MB-TB
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
G4G5/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     R2
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 occidentalis
     Western quillwort
G4G5/S1      
Juncus triglumis var. albescens
     Northern white rush
G5T5/S2     SOLC - MB-TB
Juncus triglumis var. triglumis
     Three-flower rush
G5T5/S1     SOLC - BGHRN
Juncus vaseyi
     Vasey's rush
G5?/S1     SOLC - MB-TB
Kelloggia galioides
     Milk kelloggia
G5/S2      
Kobresia sibirica
     Siberian kobresia
G5/S1      
Kobresia simpliciuscula
     Simple kobresia
G5/S1     R2
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 valdiviana
     Pale duckweed
G5/S1      
Lepidium integrifolium
     Entire-leaved Peppergrass
G2G3/S1 LD BLM  
Lesquerella arenosa var. argillosa
     Sidesaddle bladderpod
G5T4/S1   BLM  
Lesquerella carinata var. carinata
     Keeled bladderpod
G3G4T3T4/S2      
Lesquerella fremontii
     Fremont bladderpod
G2/S2   BLM R2
Lesquerella macrocarpa
     Large-fruited bladderpod
G2/S2   BLM  
Lesquerella multiceps
     Western bladderpod
G3/S1      
Lesquerella parvula
     Narrowleaved bladderpod
G3?Q/S2     SOLC - MB-TB
Lesquerella paysonii
     Payson's bladderpod
      Potential Concern
G3/S3     R4
Lesquerella prostrata
     Prostrate bladderpod
G2G3/S2   BLM  
Liatris lancifolia
     Lance-leaf gay-feather
G4/S1      
Ligularia bigelovii var. hallii
     Bigelow's groundsel
G4?T3T4/S1     SOLC - MB-TB
Ligusticum tenuifolium
     Slender-leaved lovage
G5/S1?     SOLC - MB-TB
Linanthus watsonii
     Watson's prickly-phlox
G3G5/S1     SOLC - BGHRN
Lipocarpha drummondii
     Dwarf rush
G4G5/S1      
Listera convallarioides
     Broad-leaved twayblade
G5/S2     SOLC - BGHRN, SOLC - BLKHLS, SOLC - MB-TB
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     SOLC - MB-TB
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     R2
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
G4G5T3T5/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     SOLC - BGHRN
Myosotis verna
     Spring forget-me-not
G5/S1      
Myriophyllum quitense
     Andean water milfoil
G4?/S1      
Myriophyllum verticillatum
     Whorled water milfoil
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?     SOLC - MB-TB
Packera pseudaurea var. flavula
     Streambank groundsel
G5T2T4/S1     SOLC - MB-TB
Paeonia brownii
     Brown's peony
G5/S1      
Palafoxia rosea var. macrolepis
     Rosy palafoxia
G5T4/S1     SOLC - MB-TB
Papaver kluanense
     Alpine poppy
G3G4/S2     SOLC - BGHRN
Parnassia kotzebuei
     Kotzebue's grass-of-parnassus
      Potential Concern
G5/S2     R2
Paronychia jamesii
     James' nailwort
G4/S1      
Paronychia pulvinata
     Rocky Mountain nailwort
G3?/S1      
Parrya nudicaulis
     Naked-stemmed parrya
G5/S2     R4
Pectis angustifolia var. angustifolia
     Lemon scent
G4G5TNR/S1     SOLC - MB-TB
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     SOLC - BGHRN
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   BLM R2
Penstemon acaulis
     Stemless beardtongue
G2T2/S1   BLM R4
Penstemon angustifolius var. caudatus
     Narrowleaf beardtongue
G5T4?/S1      
Penstemon caryi
     Cary's beardtongue
      Potential Concern
G3/S3     R2
Penstemon cyathophorus
     North Park beardtongue
G3/S2     SOLC - MB-TB
Penstemon gibbensii
     Gibbens' beardtongue
G1G2/S1 LD BLM  
Penstemon haydenii
     Blowout penstemon
G1G2/S1 E    
Penstemon paysoniorum
     Payson 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
GNR/S1      
Phacelia alba
     White phacelia
G4G5/S1     SOLC - MB-TB
Phacelia demissa
     Intermountain phacelia
G5/S1      
Phacelia denticulata
     Rocky Mountain phacelia
G3?/S2     SOLC - MB-TB
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     SOLC - MB-TB
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   BLM  
Phryma leptostachya
     Lopseed
G5/S1      
Physalis virginiana
     Virginia ground-cherry
G5/S1      
Physaria condensata
     Tufted twinpod
      Potential Concern
G2G3/S2S3   BLM  
Physaria dornii
     Dorn's twinpod
G1/S1 LD BLM  
Physaria eburniflora
     Devil's Gate twinpod
      Potential Concern
G2G3/S3      
Physaria lanata
     Woolly twinpod
G5T2/S2     R2
Physaria saximontana var. saximontana
     Rocky Mountain twinpod
      Potential Concern
G3T3/S3   BLM  
Physocarpus alternans
     Dwarf ninebark
G4/S1      
Pinus albicaulis
     Whitebark Pine
      Potential Concern
G3G4/S3 C BLM R2
Pinus flexilis
     Limber pine
      Potential Concern
G4/S4   BLM SOLC - BLKHLS
Platanthera orbiculata
     Large roundleaf orchid
G5/S1     R2
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
G5/SH      
Populus deltoides var. wislizeni
     Fremont cottonwood
G5T4T5/S1      
Porterella carnosula
     Western porterella
G4/S1      
Potamogeton amplifolius
     Large-leaf pondweed
G5/S1     SOLC - BGHRN
Potamogeton diversifolius
     Water-thread pondweed
G5/S1      
Potamogeton friesii
     Fries' pondweed
G4/S1      
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/S1S2     SOLC - MB-TB
Potamogeton robbinsii
     Flatleaf pondweed
G5/S1     SOLC - MB-TB
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     R2, R4, SOLC - BRDGR-TET
Prosartes hookeri
     Hooker's Fairy Bell
G5/S2      
Pseudognaphalium microcephalum var. thermale
     White cudweed
G5T4Q/S1      
Puccinellia cusickii
     Cusick's alkali-grass
G3G4Q/S1      
Pyrrocoma carthamoides var. subsquarrosa
     Absaroka goldenweed
G4G5T2T3/S2     R2
Pyrrocoma clementis var. clementis
     Tranquil goldenweed
G3G4T3T4/S1      
Pyrrocoma clementis var. villosa
     Hairy tranquil goldenweed
G3G4T2/S2     R2
Pyrrocoma crocea var. crocea
     Western goldenweed
G4?T4?/S2     SOLC - MB-TB
Pyrrocoma integrifolia
     Entire-leaf goldenweed
G3?/S1     R2
Ranunculus aquatilis var. aquatilis
     White water-crowfoot
G5/S1      
Ranunculus flabellaris
     Yellow water-crowfoot
G5/SH      
Ranunculus gelidus
     Timberline buttercup
G5/S1      
Rorippa calycina
     Persistent sepal yellowcress
      Potential Concern
G3/S3   BLM  
Rorippa truncata
     Wild yellowcress
G5/S1S2      
Rubus acaulis
     Northern blackberry
G5/S2     R2
Sagittaria latifolia
     Broadleaf arrowhead
G5/S1      
Salix barrattiana
     Barratt willow
G5/S1     R2
Salix candida
     Hoary willow
G5/S2     R2
Salix myrtillifolia
     Myrtleleaf Willow
G5/S1     R2
Salix serissima
     Autumn willow
G4/S1     R2
Sambucus nigra ssp. caerulea
     Blue Elderberry
G5?/S1      
Saussurea weberi
     Weber's saw-wort
G2G3/S2     R4
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     R2
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
G2G3/S2   BLM R2
Silene douglasii
     Douglas' campion
G4/S1      
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   BLM  
Spiranthes diluvialis
     Ute ladies' tresses
G2G3/S1S2 T    
Spirodela polyrhiza
     Greater duckweed
G5/S1      
Sporobolus heterolepis
     Northern dropseed
G5/S1      
Stanleya tomentosa var. tomentosa
     Hairy prince's-plume
      Potential Concern
G4T3/S2     SOLC - BGHRN
Stephanomeria fluminea
     Teton wire-lettuce
G2/S2      
Stephanomeria pauciflora
     Prairie skeletonplant
G5/S1      
Sullivantia hapemanii var. hapemanii
     Hapeman's sullivantia
      Potential Concern
G3T3/S3     SOLC - BGHRN
Symphyotrichum molle
     Soft aster
      Potential Concern
G3/S3     R4, SOLC - BGHRN
Symphyotrichum porteri
     Porter's aster
G3G4/S1     SOLC - MB-TB
Thelesperma caespitosum
     Green river greenthread
G2?/S1 LD BLM R4
Thelesperma pubescens
     Uinta greenthread
G2/S1 LD BLM R4
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     R2
Townsendia florifera
     Showy Easter-daisy
G5/SH      
Townsendia microcephala
     Cedar Mountain Easter-daisy
G1/S1 LD BLM  
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 LD BLM  
Trillium ovatum ssp. ovatum
     Western trillium
G5T5/S2     SOLC - MB-TB
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     R2
Utricularia intermedia
     Flatleaf bladderwort
G5/S1      
Utricularia minor
     Lesser bladderwort
      Potential Concern
G5/S3     R2
Vaccinium myrtillus var. oreophilum
     Dwarf bilberry
G5T4T5/S1      
Viburnum opulus var. americanum
     Highbush cranberry
G5T5/S2     R2
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 T    

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