Wyoming Rare Plant Field Guide
Wyoming Rare Plant Reference List
| Scientific Name Common Name |
Heritage Rank | Federal Status | |
| Abronia ammophila Greene | G1/S1 | C2 | |
| Yellowstone Sand Verbena | |||
| Adenocaulon bicolor Hook. | G5/S1 | S-R2 | |
| American Trailplant | |||
| Agoseris lackschewitzii Henderson, Moseley & Cholewa | G3/S2 | S-R2,S-R4 | |
| Pink Agoseris | |||
| Agrostis rossiae Vasey | G1/S1 | C2 | |
| Ross' Bentgrass | |||
| Aletes humilis Coult. & Rose | G2/SH | C2,S-R2 | |
| Larimer Aletes | |||
| Amerorchis rotundifolia (Banks) Hulten | G5/S1 | S-R2 | |
| Round-leaved Orchid | |||
| Androsace chamaejasme Wulf. var. carinata (Torr.) Knuth | G5T4/S2 | FS-BT | |
| Sweet-flowered Rock Jasmine | |||
| Androsace lehmanniana | |||
| [see A. chamaejasme var. carinata] | |||
| Antennaria arcuata Cronq. | G2/S2 | C2,S-R4 | |
| Meadow Pussytoes | |||
| Aquilegia laramiensis A. Nels. | G2/S2 | C2,S-R2 | |
| Laramie Columbine | |||
| Arabis pusilla Roll. | G1/S1 | C1 | |
| Small Rock Cress | |||
| Arctostaphylos rubra (Rehd. & Wils.) Fern. | G5/S1 | S-R2 | |
| Red Manzanita | |||
| Arctous rubra | |||
| [see Arctostaphylos r.] | |||
| Arnica lonchophylla Greene | G4?/S1 | S-R2 | |
| Northern Arnica | |||
| Artemisia biennis Willd. var. diffusa Dorn | G5T1Q/S1 | C2 | |
| Mystery Wormwood | |||
| Artemisia porteri Cronq. | G2/S2 | ||
| Porter's Sagebrush | |||
| Asclepias uncialis Greene | G3/SH | C2,S-R2 | |
| Dwarf Milkweed | |||
| Aster mollis Rydb. | G2G3/S2S3 | C2,S-R2,S-R4 | |
| Soft Aster | |||
| Astragalus diversifolius Gray var. diversifolius | G3/SH | S-R4 | |
| Meadow Milkvetch | |||
| Astragalus drabelliformis Barneby | G2/S2 | C2 | |
| Bastard Draba Milkvetch | |||
| Astragalus gilviflorus Sheld. var. purpureus Dorn | G5TS/S2 | C2 | |
| Dubois Milkvetch | |||
| Astragalus jejunus Wats. var. articulatus Dorn | G3T1/S1 | C2 | |
| Hyattville Milkvetch | |||
| Astragalus jejunus Wats. var. jejunus | G3T3/S2 | S-R4 | |
| Starveling Milkvetch | |||
| Astragalus paysonii (Rydb.) Barneby | G3/S2 | C2,S-R4 | |
| Payson's Milkvetch | |||
| Astragalus proimanthus (Rydb.) Barneby | G1/S1 | C2 | |
| Precocious Milkvetch | |||
| Bolophyta alpina | |||
| [see Parthenium alpinum] | |||
| Botrychium ascenders Wagner | G3?/S1 | C2,S-R2,S-R4 | |
| Upward-lobe Moonwort | |||
| Botrychium campestre Wagner & Farrar | G2/S1 | S-R2 | |
| Prairie Moonwort | |||
| Carex alopecoidea Tuckerm. | G5/S1 | S-R2 | |
| Foxtail Sedge | |||
| Carax incurviformis Mack. | G3T3/S2 | S-R4 | |
| Seaside Sedge | |||
| Carex livida (Wahl.) Willd. | G5/S1 | S-R2 | |
| Livid Sedge | |||
| Carex luzulina Olney var. atropurpurea Dorn | G5T2/S2 | S-R4 | |
| Black and Purple Sedge | |||
| Carex maritima | |||
| [see C. incurviformis] | |||
| Cirsium aridum Dorn | G1/S1 | C2 | |
| Cedar Rim Thistle | |||
| Cirsium ownbeyi Welsh | G3/S1 | C2 | |
| Ownbey's Thistle | |||
| Cirsium sp. nov. | |||
| [see C. aridum] | |||
| Cleome multicaulis Seese & Mocino | G2/S1 | C2 | |
| Many-Stemmed Spider-Flower | |||
| Cryptantha subcapitata Dorn & Lichvar | G1/S1 | C2 | |
| Owl Creek Miner's Candle | |||
| Cymopterus williamsii Hartman Contance | G3/S3 | 3C | |
| Williams' Waferparsnip | |||
| Cypripedium fasciculatum Kell. ex Wats. | G3/S2 | C2,S-R2,S-R4 | |
| Clustered Lady's Slipper | |||
| Cypripedium montanum Dougl. ex Lindl. | G4G5/S1 | C2 | |
| Mountain Lady's Slipper | |||
| Descurainia torulosa Roll. | G1/S1 | C2,S-R2,S-R4 | |
| Wyoming Tansymustard | |||
| Draba apiculata | |||
| [see D. densifolia var. apiculata] | |||
| Draba borealis DC. | G4/S1 | FS-BT | |
| Boreal Draba | |||
| Draba densifolia Nutt. var. apiculata | G4G5/S2 | S-R4 | |
| (Hitchc.) Welsh Rockcress Draba | |||
| Draba globosa | |||
| [see D. densifolia var. apiculata] | |||
| Draba oligosperma var. pectinipila | |||
| [see D. pectinipila] | |||
| Draba pectinipila Roll. | G1Q/S1 | C2 | |
| Comb-Hair Whitlow-Grass | |||
| Epipactis gigantea Dougl. ex Hook. | G4/S1 | S-R2 | |
| Giant Helleborine | |||
| Equisetum scirpoides Michx. | G5/S1 | S-R2 | |
| Dwarf Scouring Rush | |||
| Erigeron lanatus Hook. | G4/S1 | S-R2,S-R4 | |
| Wooly Fleabane | |||
| Eriogonum brevicaule Nutt. var. canum (Stokes) Dorn | G3/S1 | C2 | |
| Rabbit Buckwheat | |||
| Eriogonum lagopus | |||
| [see E. brevicaule var. canum] | |||
| Festucu hallii (Vasey) Piper | G2G3/S1 | S-R2 | |
| Hall's Fescue | |||
| Gaura neomexicana Woot. ssp. coloradensis (Munz) Raven & Gregory | G4T2/S2 | C1,S-R2 | |
| Colorado Butterfly Plant | |||
| Haplopappus carthamoides var. subsquarrosus | |||
| [see Pyrrocoma c. var. s.] | |||
| Haplopappus coloradoensis | |||
| [see Machaeranthera c.] | |||
| Haplopuppus macronema Gray var. linearis (Rydb.) Dorn | G4T2/S2 | S-R4 | |
| Narrowleaf Goldenweed | |||
| Haplopappus macronema var. canescens | |||
| [see H.m. var. linearis] | |||
| Ipomopsis aggregata (Pursh) V. Grant ssp. weberi V. Grant & Wilken | G5T2?/S1 | C2,S-R2 | |
| Weber's Scarlet-Gilia | |||
| Ipomopsis spicata (Nutt.) V. Grant ssp. robruthii Wilken & Hartman | G4?T2/S2 | C2,S-R2 | |
| Kirkpatrick's Ipomopsis | |||
| Lesquerella arenosa (Richards) Rydb. var. argillosa Roll. & Shaw | G5T3/S1 | ||
| Sidesaddle Bladderpod | |||
| Lesquerella carinata Roll. var. carinata | G3T3/S1 | C2 | |
| Keeled Bladderpod | |||
| Lesquerella fremontii Roll. & Shaw | G2/S2 | S-R2 | |
| Fremont Bladderpod | |||
| Lesquerella macrocarpa A. Nels. | G2/S2 | C2 | |
| Large-Friuted Bladderpod | |||
| Lesquerella paysonii Roll. | G2/S2 | C2,S-R4 | |
| Payson's Bladderpod | |||
| Lycopodium complanatum L. | G5/S1 | S-R2 | |
| Trailing Clubmoss | |||
| Lycopodium dendroideum Michx. | G5/S1 | S-R2 | |
| Treelike Clubmoss | |||
| Machaeranthera coloradoensis (Gray) Osterh. | G2?/S1 | S-R2 | |
| Colorado Tansy-Aster | |||
| Muhlenbergia glomerata (Willd.) Trin. | G4/S1 | S-R2 | |
| Marsh Muhly | |||
| Orchis rotundifolia | |||
| [see Amerorchis rotundifolia] | |||
| Oryzopsis contracta (Johnson) Shechter | G3/S3 | C2 | |
| Contracted Indian Ricegrass | |||
| Oryzopsis hymenoides var. contracta | |||
| [see O. contracta] | |||
| Parrya nudicaulis (L.) Boiss. | G5/S1 | S-R2,S-R4 | |
| Naked-Stemmed Parrya | |||
| Parthenium alpinum (Nutt.) T. & G. | G2G3/S2S3 | S-R2 | |
| Alpine Feverfew | |||
| Penstemon acaulis Williams var. acaulis | G3/S1 | C2,S-R4 | |
| Stemless Beardtongue | |||
| Penstemon caryi Penn. | G2/G3/S2 | C2,S-R2 | |
| Cary's Beardtongue | |||
| Penstemon gibbensii Dorn | G1/S1 | C2 | |
| Gibben's Beardtongue | |||
| Phlox opalensis Dorn | G1/S1 | C2 | |
| Opal Phlox | |||
| Phlox pungens Dorn | G2/S2 | C2 | |
| Beaver Rim Phlox | |||
| Phlox sp. nov. | |||
| [see P. opalensis] | |||
| Physaria condensata Roll. | G2/S2 | ||
| Tufted Twinpod | |||
| Physaria dornii Lichvar | G1/S1 | C2 | |
| Dorn's Twinpod | |||
| Physaria eburniflora Roll. | G2/S2 | C2 | |
| Devil's Gate Twinpod | |||
| Physaria integrifolia (Roll.) Lichvar var. monticola Lichvar | G3G4T2Q/S2 | C2,S-R4 | |
| Creeping Twinpod | |||
| Physaria saximontana Roll. var. saximontana | G3T2/S2 | C2 | |
| Rocky Mountain Twinpod | |||
| Primula egaliksensis Wormskj. ex Hornem. | G4/S1 | S-R2,FS-BT | |
| Greenland Primrose | |||
| Pyrrocoma carthamoides Hook. var. subsquarrosus (Greene) G. Brown & Keil | G5T2/S2 | C2,S-R2 | |
| Absaroka Goldenweed | |||
| Rorippa calycina (Engelm.) Rydb. | G3/S3 | C2 | |
| Persistent Sepal Yellowcress | |||
| Rubus acaulis | |||
| [see R. arcticus ssp. a.] | |||
| Rubus arcticus L. ssp. acaulis (Michx.) Focke | G5/S1 | S-R2 | |
| Northern Blackberry | |||
| Salix myrtillifolia Anderss. var. myrtillifolia | G5T5/S1 | S-R2 | |
| Myrtleleaf Willow | |||
| Salix serissima (Bailey) Fern. | G4/S1 | S-R2 | |
| Autumn Willow | |||
| Saussurea weberi Hult. | G3/S2 | S-R4 | |
| Weber's Saw-Wort | |||
| Scirpus atrocinctus | |||
| [see Scirpus c.] | |||
| Scirpus cyperinus (L.) Kunth. | G5/S1 | S-R2 | |
| Cottongrass Bulrush | |||
| Scirpus pumilus | |||
| [see Scirpus r.] | |||
| Scirpus rollandii Fern. | G5/S1 | S-R2 | |
| Rolland's Bulrush | |||
| Shoshonea pulvinata Evert & Const. | G2G3/S2 | C2,S-R2 | |
| Shoshonea | |||
| Sisyrinchium pallidum Cholewa & Henderson | G3/S2S3 | C2 | |
| Pale Blue-Eyed Grass | |||
| Sphaeromeria simplex (A. Nels.) Heller | G1/S1 | C2,S-R2 | |
| Laramie False Sagebrush | |||
| Spiranthes diluvialis Shev. | G2/S1 | T | |
| Ute Lady's Tresses | |||
| Sullivantia hapemanii (Coulter & Fisher) Coulter var. hapemanii | G2/S2 | C2,S-R2 | |
| Hapeman's Sullivantia | |||
| Thelesperma caespitosum Dorn | G1/S1 | C2,S-R4 | |
| Green River Greenthread | |||
| Thelesperma pubescens Dorn | G1/S1 | C2,S-R4 | |
| Uinta Greenthread | |||
| Thelesperma subnudum var. caespitosum | |||
| [see Thelesperma c.] | |||
| Townsendia condensata Parry ex Gray var. anomala (Heiser) Dorn | G4T2/S2 | S-R2 | |
| North Fork Easter Daisy | |||
| Townsendia microcephala Dorn | G1/S1 | C2 | |
| Cedar Mountain Easter Daisy | |||
| Townsendia sp. nov. | |||
| [see T. microcephala] | |||
| Trifolium barnebyi (Isley) Dorn & Lichvar | G1/S1 | C2 | |
| Barneby's Clover | |||
| Trifolium haydenii var. barnebyi | |||
| [see Trifolium b.] | |||
| Yermo xanthocephalus Dorn | G1/S1 | C2 | |
| Desert Yellowhead | |||
Code:
C1 = USFWS Category 1C2 = USFWS Category 2
T = Listed Threatened by USFWS
S-R2 = Designated Sensitive in USFS Region 2 (Rocky Mountain Region)
S-R4 = Designated Sensitive in USFS Region 4 (Intermountain Region)
FS-BT = Forest Sensitive, Bridger-Teton NF
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