2012 Wyoming Plant Species of Concern List

Bonnie Heidel Wyoming Natural Diversity Database, University of Wyoming www.uwyo.edu/wyndd/ April 7, 2012 The 2012 Wyoming Plant Species of Concern list contains the 434 vascular plant species/varieties considered to be of greatest conservation concern in the state. All changes since the 2007 list are bold-faced. It is accompanied by the Species of Potential Concern list, containing those species of limited distribution that could become vulnerable in the future and species recognized as sensitive by federal agencies that are no longer tracked. There are also lists compiled of species added since 2007, species deleted since 2007, and species of undetermined status. The 2012 list and related lists reflect new efforts to standardize state ranks in rule-based calculations informed by peer reviews. The methods and background are presented at the end of the list. Codes and definitions are posted on-line. The lists follow most taxonomic treatments in Dorn (2001). Species Scientific Heritage Rank Federal Status County Managed Area Range Context # Occurs. Abundance Recent Intrinsic Wyoming Common Name Trends Vulnerability Contribution Rank Abies concolor G5/S1 SWE, UIN Rock Springs BLM Widespread/ Edge Very Low Rare Stable? Low Moderate White fir Wasatch-Cache NF Achnatherum nevadense G4/S1 CAR, FRE, Bridger-Teton NF Disjunct Very Low Rare Unknown Moderate Medium [Stipa nevadensis] PAR?, Lander BLM Nevada needlegrass TET Rawlins BLM Rock Springs BLM Achnatherum scribneri G4/S1 LAR Widespread/ Edge Very Low Rare Unknown Moderate Low [Stipa scribneri] Scribner needlegrass

Achnatherum swallenii G3G4/S2 LIN, SUB. Kemmerer BLM Regional Endemic/ Low Uncommon Stable? Moderate Medium [Oryzopsis swallenii] SWE Pinedale BLM Edge Swallen mountain-ricegrass Rock Springs BLM Adiantum aleuticum G5?/S1 TET Grand Teton NP Disjunct Very Low Rare Stable? Low Medium [A. pedatum var. aleuticum] Targhee NF Aleutian maidenhair Yellowstone NP Adoxa moschatellina G5/S2 Bghrn NF- ALB, CRO, Bighorn NF Disjunct Low Rare Stable? Moderate Medium Moschatel SOLC, PAR, SHE, Black Hills NF MBNF-SOLC WAS Medicine Bow NF? Agrostis mertensii G5/S2 ALB, FRE, GrandShoshone Teton NF NP Disjunct Low Unknown Stable? Moderate Medium [A. borealis] PAR, TET MedicineYellowstone Bow NP NF Northern bentgrass Shoshone NF Yellowstone NP

Agrostis oregonensis G4/S1 PAR, TET Bridger-Teton NF Widespread/ Edge Very Low Unknown Unknown Moderate Low Oregon bentgrass Grand Teton NP? Shoshone NF Yellowstone NP Agrostis rossiae G1/S1 TET Yellowstone NP Local Endemic/ Core Very Low Rare Stable High Very High Ross bentgrass

1 2012 Wyoming Plant Species of Concern List

Species Scientific Heritage Rank Federal Status County Managed Area Range Context # Occurs. Abundance Recent Intrinsic Wyoming Common Name Trends Vulnerability Contribution Rank Aletes humilis G2G3/SH? MBNF-SOLC ALB? Regional Endemic/ Very Low Unknown Unknown Unknown Unknown Larimer aletes Edge Amerorchis rotundifolia G5/S1 USFS R2 PAR Shoshone NF Disjunct Very Low Rare Moderate High Medium [Orchis rotundifolia] Sensitive Decline? Round-leaved orchid Ammannia robusta G5/S1 WES Widespread/ Edge Very Low Unknown Unknown Moderate Low Robust toothcup Amphicarpaea bracteata G5/S1 CRO Black Hills NF Widespread/ Edge Very Rare Unknown Moderate Low Groundnut Low Androsace chamaejasme var. G5T4/S1S2 USFS R4 FRE, HOT, Cody BLM? Widespread/ Edge Low Uncommon Stable Moderate Low carinata Sensitive PAR, TET Shoshone NF [ A. chamaejasme; A. c. var. Targhee NF lehmanniana ] Yellowstone NP? Sweet-flowered rock-jasmine Anemone lyallii G4/S1 TET Targhee NF Disjunct Very Low Unknown Unknown Moderate Medium Lyall's wood anemone Anemone narcissiflora ssp. G5T4/S1 BIG, JOH, Bighorn NF Regional Endemic/ Very Low Uncommon Stable Moderate Medium zephyra SHE Edge Zephyr windflower Antennaria arcuata G2/S2 USFS R4 FRE, SUB Lander BLM Regional Endemic/ Moderate Uncommon Stable Moderate Very High Meadow pussytoes Sensitive Pinedale BLM Rock Core WY BLM Springs BLM Sensitive Antennaria flagellaris G5?/S2 PAR, TET Shoshone NF Disjunct Low Unknown Stable Low Medium Stoloniferous pussytoes Yellowstone NP Antennaria monocephala [A. m. G4G5TNR/S2 BGHRN NF- FRE, JOH, Bighorn NF Widespread/ Edge Low Rare Stable Moderate Low ssp. angustata] SOLC PAR, SUB, Bridger-Teton NF Single-head pussytoes TET Shoshone NF Targhee NF Aquilegia brevistyla G5/S1 CRO, Black Hills NF Disjunct Very Low Unknown Stable? Low Medium Small-flower columbine PAR?, Newcastle BLM WES Shoshone NF? Aquilegia formosa var. formosa G5T5/ S1 PAR, TET Grand Teton NP Widespread/ Edge Very Low Unknown Unknown Moderate Low Crimson columbine JDR Parkway Shoshone NF Yellowstone NP? Aquilegia laramiensis G2G3/S2S3 USFS R2 ALB, CON Casper BLM Local Endemic/ Core Moderate Rare Stable? Moderate Very High Laramie columbine Sensitive Medicine Bow NF WY BLM Rawlins BLM Sensitive Arceuthobium douglasii G5/SH LIN, TET Bridger-Teton NF Widespread/ Edge Very Low Unknown Unknown Moderate Unknown Douglas-fir dwarf-mistletoe Targhee NF Arctous rubra G5/S1 PAR Shoshone NF Disjunct Very Low Rare Stable? Moderate Medium [Arctostaphylos rubra] Red manzanita

2 2012 Wyoming Plant Species of Concern List

Species Scientific Heritage Rank Federal Status County Managed Area Range Context # Occurs. Abundance Recent Intrinsic Wyoming Common Name Trends Vulnerability Contribution Rank Argyrochosma fendleri G3/S1 LAR Widespread/ Edge Very Low Rare Stable? Moderate Medium [Notholaena fendleri] Fendler's false cloak-fern Aristida curtissii G5/S1 CRO?, Widespread/ Edge Very Low Rare Unknown Moderate Low [A. basiramea var. curtissii] WES Curtis' three-awn Aristida oligantha G5/S1 WES Thunder Basin NG Widespread/ Edge Very Low Unknown Unknown Moderate Low Prairie three-awn Arnica angustifolia var. tomentosa G5T5/S1 FRE Shoshone NF Widespread/ Edge Very Low Rare Stable Moderate Low [A. alpina var. tomentosa] Alpine arnica

Artemisia biennis var. diffusa G5T1Q/S1 WY BLM SWE Local Endemic/ Core? Very Low Rare Large High Very High Mystery wormwood Sensitive Decline Artemisia porteri G2/S2 WY BLM FRE, JOH, Buffalo BLM Local Endemic/ Core Low Uncommon Stable? Moderate Very High Porter's sagebrush Sensitive NAT Casper BLM Lander BLM Asclepias arenaria G5?/S1 GOS Casper BLM Widespread/ Edge Very Low Rare Unknown Moderate Low Sand milkweed Asclepias engelmanniana G5/S1 GOS Widespread/ Edge Very Low Unknown Unknown Moderate Low Engelmann's milkweed Asclepias hallii G3/SH ALB Rawlins BLM? Widespread/ Edge Very Low Unknown Unknown Unknown Unknown Hall's milkweed Asclepias subverticillata G4G5/SH CAR Rawlins BLM? Widespread/ Edge Very Low Unknown Unknown Unknown Unknown Bedstraw milkweed Asclepias uncialis G3G4/SH USFS R2 SWE? Rock Springs BLM? Disjunct Very Low Unknown Unknown Unknown Unknown Dwarf milkweed Sensitive Seedskadee NWR? Asclepias verticillata G5/S1 CRO Devils Tower NM Widespread/ Edge Very Low Unknown Unknown Moderate Low Whorled milkweed Aspidotis densa G5/S1 TET Grand Teton NP Widespread/ Edge Very Low Rare Stable? Moderate Low [Cryptogramma densa] Pod-fern Asplenium trichomanes G5/S1 ALB, NAT Medicine Bow NF Widespread/ Edge Very Low Rare Stable? Moderate Low Maidenhair spleenwort Asplenium trichomanes-ramosum G4/S2 ALB, BIG, Bighorn NF Disjunct Low Rare Stable? Moderate Medium [A. viride] CAR, SHE, Bridger-Teton NF Green spleenwort SUB, TET, Grand Teton NP WAS Medicine Bow NF Targhee NF

Aster alpinus var. vierhapperi G5T5/S1 PAR Shoshone NF Disjunct Very low Unknown Unknown Moderate Medium Alpine aster Astragalus bisulcatus var. G5T5?/S1? CAR, Lander BLM Widespread/ Edge Low? Unknown Unknown Moderate Low haydenianus FRE?, Kemmerer BLM Hayden's milkvetch LIN?, Rawlins BLM SWE, UIN Rock Springs BLM

3 2012 Wyoming Plant Species of Concern List

Species Scientific Heritage Rank Federal Status County Managed Area Range Context # Occurs. Abundance Recent Intrinsic Wyoming Common Name Trends Vulnerability Contribution Rank Astragalus coltonii var. moabensis G4T3?/S2 SWE, UIN Kemmerer BLM Regional Endemic/ Low Uncommon Stable? Moderate Medium Moab milkvetch Rock Springs BLM Edge

Astragalus diversifolius G2/ S1 WY BLM SWE Rawlins BLM Regional Endemic/ Very Rare Stable? Moderate High Meadow milkvetch Sensitive, Core Low USFS R4 Sensitive Astragalus gilviflorus var. G5T2/S2 WY BLM BIG?, Lander BLM Local Endemic/ Core Low Uncommon Stable Moderate Very High purpureus Sensitive FRE, WAS, Shoshone NF [Orophaca triphylla var. Wind River Worland BLM? purpurea] IR Dubois milkvetch Astragalus jejunus var. articulatus G3T1/S1 WY BLM BIG Worland BLM Local Endemic/ Core Very Low Rare Moderate Moderate Very High Hyattville milkvetch Sensitive Decline?

Astragalus lentiginosus var. G5T5/S1 LIN, UIN Fossil Butte NM Widespread/ Edge Very Low Unknown Unknown Low Low salinus Kemmerer BLM Sodaville milkvetch Astragalus leptaleus G4/SH USFS R2 CAR Medicine Bow NF Regional Endemic/ Very Low Unknown Unknown Unknown Unknown Park milkvetch Sensitive Trgh Edge NF-SOLC

Astragalus paysonii G3/S2 USFS R4 LIN, SUB, Bridger-Teton NF Regional Endemic/ Moderate Uncommon Stable? Moderate High Payson's milkvetch Sensitive TET Targhee NF Core Astragalus platytropis G5/S1 PAR Cody BLM Disjunct Very Low Unknown Unknown Moderate Medium Broad-keeled milkvetch Astragalus proimanthus G1/S1 WY BLM SWE Rock Springs BLM Local Endemic/ Core Very Low Rare Moderate Moderate Very High [Orophaca proimantha] Sensitive Decline Precocious milkvetch Astragalus racemosus var. G5T2/S2 WY BLM LIN, SUB, Kemmerer BLM Regional Endemic/ Low Rare Unknown Moderate High treleasei Sensitive UIN Pinedale BLM Core Trelease's racemose milkvetch Astragalus terminalis G3/S2 TET Bridger-Teton NF Regional Endemic/ Low Uncommon Stable? Moderate Medium Railhead milkvetch Grand Teton NP Natl Edge Elk Refuge Atriplex wolfii G3G4/S1 CAR, SWE Rawlins BLM Regional Endemic/ Very Low Unknown Unknown Moderate Medium [Atriplex tenuissima] Rock Springs BLM Edge Wolf's orache Bacopa rotundifolia G5/S1 CRO, LAR Black Hills NF Widespread/ Edge Very Low Unknown Increase? Moderate Low Roundleaf water-hyssop Besseya alpina G4/S1 MBNF-SOLC ALB, CAR, Medicine Bow NF Regional Endemic/ Very Low Uncommon Stable? Moderate Medium Alpine kittentails TET? Grand Teton NP? Edge

Besseya plantaginea GNR/S1 MBNF-SOLC ALB Medicine Bow NF Regional Endemic/ Very Low Uncommon Stable Moderate Medium White River kittentails Edge Boechera crandallii G2G3 /S1 CAR, SWE Ashley NF [FGNRA] Regional Endemic/ Very Low Rare Unknown Moderate Medium [Arabis crandallii] Rawlins BLM Edge Crandall's rockcress Rock Springs BLM 4 2012 Wyoming Plant Species of Concern List

Species Scientific Heritage Rank Federal Status County Managed Area Range Context # Occurs. Abundance Recent Intrinsic Wyoming Common Name Trends Vulnerability Contribution Rank Boechera perennans G5/S1 ALB, Widespread/ Edge Very Low Unknown Unknown Moderate Unknown [Arabis perennans] NIO?, Perennial rockcress SWE? Boechera pusilla G1/S1 Candidate FRE Rock Springs BLM Local Endemic/ Core Very Low Rare Moderate High Very High [Arabis pusilla] decline Small rockcress Boechera selbyi G4?Q/S1 SWE Ashley NF [FGNRA] Widespread/ Edge Low Unknown Unknown Moderate Low [B. gracilenta; Arabis selbyi] Rawlins BLM Selby's rockcress Rock Springs BLM Botrychium ascendens G2G3/S2 USFS R4 FRE, JOH, Bighorn NF Disjunct Low Rare Unknown Moderate Medium Upward-lobe moonwort Sensitive, PAR, SHE Shoshone NF USFS R2 Sensitive Botrychium campestre G3G4/S1 USFS R2 CRO Black Hills NF Widespread/ Edge Very Low Rare Unknown Moderate Medium Prairie moonwort Sensitive Botrychium crenulatum G3/S1 TET Targhee NF Widespread/ Edge Very Rare Unknown Moderate Low Crenulate moonwort Low Botrychium hesperium G4/ S1 JOH, SHE Bighorn NF Widespread/ Edge Very Rare Unknown Moderate Low Western moonwort Low Botrychium lanceolatum G5/S2 Bghrn NF- BIG, CAR, Bighorn NF Widespread/ Edge Low Rare Unknown Moderate Low [B. l. var. lanceolatum SOLC, MBNF- FRE, JOH, Shoshone NF Lance-leaved moonwort SOLC PAR, SHE Yellowstone NP

Botrychium lineare G2?/S1 USFWS CRO Black Hills NF Disjunct Very Low Rare Unknown Moderate Medium Narrowleaf moonwort Candidate USFS R2 Sensitive Botrychium minganense G4 /S2 Bghrn NF- BIG, CAR, Bighorn NF Widespread/ Edge Low Rare Unknown Moderate Low [B. lunaria var. onondagense] SOLC CRO, FRE, Black Hills NF Grand Mingan moonwort JOH, PAR, Teton NP Medicine SHE, TET Bow NF Shoshone NF

Botrychium pallidum G3/S1 USFS R2 CRO Black Hills NF Disjunct Very Low Rare Unknown Moderate Medium Pale moonwort Sensitive Botrychium paradoxum G2/S1 USFS R2 BIG, JOH, Bighorn NF Sparse/ Core? Very Low Rare Unknown Moderate Medium Puzzling moonwort Sensitive SHE

Bouteloua simplex G5/S1 LAR FE Warren AFB Widespread/ Edge Very Low Unknown Unknown Moderate Low Mat grama Braya glabella G5/S1 USFS R2 SUB, TET Bridger-Teton NF Disjunct Very Low Rare Unknown Moderate Medium Arctic braya Sensitive Braya humilis G5/S1 FRE Shoshone NF Disjunct Very Low Rare Unknown Moderate Medium Low braya Bromus pubescens G5/SH CON Widespread/ Edge Very Low Unknown Unknown Moderate Unknown Hairy wood brome

5 2012 Wyoming Plant Species of Concern List

Species Scientific Heritage Rank Federal Status County Managed Area Range Context # Occurs. Abundance Recent Intrinsic Wyoming Common Name Trends Vulnerability Contribution Rank Calochortus apiculatus G4/S1 CRO Black Hills NF Disjunct Very Low Very Rare Unknown Moderate Medium Pointed mariposa Campanula aparinoides G5/S1 CRO Black Hills NF Widespread/ Edge Very Low Unknown Unknown Moderate Low Marsh bellflower Carex alopecoidea G5/S2 USFS R2 CRO Black Hills NF Disjunct Low Rare Unknown Moderate Medium Foxtail sedge Sensitive Carex concinna G5/S1 MBNF-SOLC CRO, PAR, Black Hills NF Disjunct Very Low Rare Unknown Moderate Medium Beautiful sedge SUB Bridger-Teton NF Shoshone NF Yellowstone NP Carex crawei G5/S1 GOS, LAR FE Warren AFB Widespread/ Edge Very Low Rare Unknown Moderate Low Crawe's sedge Carex diandra G5/ S2 USFS R2 ALB, CAR, Bighorn NF Grand Disjunct Low Rare Stable Moderate Medium Lesser panicled sedge Sensitive PAR, SHE, Teton NP Medicine TET Bow NF Shoshone NF Yellowstone NP Carex eburnea G5/S1 CRO Widespread/ Edge Very Low Rare Unknown Moderate Low Ebony sedge Carex egglestonii G4/S1 ALB, CAR Medicine Bow NF Regional Endemic/ Very Low Unknown Unknown Moderate Medium Eggleston's sedge Edge Carex emoryi G5/S1 CRO, GOS, Camp Guernsey TA Widespread/ Edge Very Low Uncommon Stable Moderate Low Emory's sedge PLA Casper BLM Devils Tower NM Fort Laramie NHS Carex flava G5/S1 PAR, TET Yellowstone NP Widespread/ Edge Very Low Rare Stable? Moderate Low Yellow sedge Carex foenea s. s. G5/S1 CRO Black Hills NF Disjunct Very Low Rare Unknown Moderate Medium [C. aenea] Bronze sedge Carex granularis var. haleana G5T4/S2 CRO Black Hills NF Disjunct Low Unknown Unknown Moderate Medium Meadow sedge Carex incurviformis var. G4G5T3/S2 USFS R4 FRE, PAR, Bridger-Teton NF Disjunct Low Rare Stable? Moderate Medium danaensis Sensitive SUB, TET Grand Teton NP [C. maritima] Shoshone NF Incurved sedge Carex infirminervia G5/S2 LIN, PAR, Bridger-Teton NF Widespread/ Edge Low Unknown Unknown Moderate Low [C. bolanderi, C. deweyana var. TET Shoshone NF Targhee bolanderi - misapplied] NF Yellowstone NP Bolander's sedge Carex intumescens G5/S1 CRO Black Hills NF Disjunct Very Rare Unknown Moderate Medium Great bladder sedge Low Carex laeviculmis G5/S1 TET Grand Teton NP Widespread/ Edge Very Low Unknown Unknown Moderate Low Smooth-stemmed sedge JDR Parkway Yellowstone NP Carex lenticularis var. dolia G5T3Q/S1 FRE Shoshone NF Disjunct Very Unknown Unknown Moderate Medium Enander's sedge Low

6 2012 Wyoming Plant Species of Concern List

Species Scientific Heritage Rank Federal Status County Managed Area Range Context # Occurs. Abundance Recent Intrinsic Wyoming Common Name Trends Vulnerability Contribution Rank Carex luzulina var. atropurpurea G5T3/S2 USFS R4 FRE, SUB, Bridger-Teton NF Regional Endemic/ Low Uncommon Unknown Moderate High Black and purple sedge Sensitive TET Shoshone NF Core Carex microglochin G5?/S2 FRE, PAR, Bridger-Teton NF Disjunct Low Uncommon Unknown Moderate Medium False uncinia sedge SUB Pinedale BLM Shoshone NF Yellowstone NP Carex misandra G5/S2 Bghrn NF- FRE, JOH, Bighorn NF Disjunct Low Rare Unknown Moderate Medium [C. fuliginosa; C. f. var. misandra] SOLC PAR Shoshone NF Short-leaf sedge Carex nelsonii G3/S2 ALB, CAR, Bighorn NF Medicine Regional Endemic/ Low Uncommon Unknown Moderate High Nelson's sedge FRE, JOH, Bow NF Shoshone Core PAR, SUB NF Carex occidentalis G4/S1 ALB, Cody BLM? Widespread/ Edge Very Low Unknown Unknown Moderate Low Western sedge CAR, Medicine Bow NF FRE?, Rawlins BLM? PAR?, Shoshone NF? TET? Carex oreocharis G3/S1 ALB, LAR Medicine Bow NF Regional Endemic/ Very Low Uncommon Stable? Moderate Medium Mountain-loving sedge Rawlins BLM Edge Carex parryana var. unica G4?Q/ S1S2 ALB, CAR, Medicine Bow NF Widespread/ Edge Very Uncommon Unknown Moderate Low [C. hallii; C. parryana ssp. hallii] LAR, PLA Rawlins BLM Low Hall's sedge Carex proposita G4/S1 TET Grand Teton NP Widespread/ Edge Very Low Unknown Unknown Moderate Low Smoky Mountain sedge Carex richardsonii G5/S2 CRO Black Hills NF Disjunct Low Uncommon Stable? Moderate Medium Richardson sedge Carex rosea G5/S2 CRO Black Hills NF Disjunct Low Unknown Unknown Moderate Medium Rosy sedge Carex scirpoideavar. scirpiformis G5T4Q/S1 PAR, TET Natl Elk Refuge Widespread/ Edge Very Low Rare Unknown Moderate Low [C. scirpiformis; incl. in var. Shoshone NF scirpoidea by some authors] Canadian single-spike sedge Carex scoparia G5/S1 CRO Black Hills NF Widespread/ Edge Very Unknown Unknown Moderate Low Broom sedge Low Ceanothus herbaceus G5/S1 CRO Black Hills NF Widespread/ Edge Very Low Rare Stable? Moderate Low Prairie redroot Ceanothus martinii G4/S1 LIN, SWE Fossil Butte NM Widespread/ Edge Very Low Rare Stable? Moderate Low Utah mountain lilac Rock Springs BLM Celtis occidentalis G5/S1 GOS, PLA, Bighorn NF Widespread/ Edge Very Low Rare Unknown Moderate Low Common hackberry SHE Casper BLM? Centunculus minimus G5/S1 CRO, PLA Black Hills NF Widespread/ Edge Very Low Unknown Unknown Moderate Low [Anagallis minima] Chaffweed

7 2012 Wyoming Plant Species of Concern List

Species Scientific Heritage Rank Federal Status County Managed Area Range Context # Occurs. Abundance Recent Intrinsic Wyoming Common Name Trends Vulnerability Contribution Rank Cercocarpus ledifolius var. G5T4/S1 SWE Ashley NF (FGNRA) Widespread/ Edge Very Low Rare Unknown Moderate Low intricatus Rock Springs BLM [C. intricatus] Dwarf mountain mahogany Chamaechaenactis scaposa G4/S1S2 SWE Kemmerer BLM Regional Endemic/ Low Rare Unknown Moderate Medium [C. s. var. parva] Rock Springs BLM Edge Fullstem Chamaesyce geyeri G5/S1 GOS Casper BLM Widespread/ Edge Very Low Rare Unknown Moderate Low [Euphorbia geyeri] Geyer's spurge Chenopodium incanum var. G5T5/S1 GOS Widespread/ Edge Very Low Uncommon Unknown Low Low incanum Mealy goosefoot Chenopodium watsonii G5/S1 GOS, LAR, Thunder Basin NG Widespread/ Edge Very Low Unknown Unknown Low Low Watson goosefoot WAS, Worland BLM WES Chionophila jamesii G4?/S1 ALB, CAR Medicine Bow NF Regional Endemic/ Very Low Uncommon Stable? Moderate Medium Rocky Mountain snowlover Edge

Chrysothamnus greenei G5/S1? SWE Rawlins BLM Widespread/ Edge Very Low Unknown Unknown Moderate Low Greene rabbitbrush Cicuta bulbifera G5/S1 TET Targhee NF Disjunct Very Low Rare Unknown Moderate Medium Bulb-bearing water-hemlock Circaea lutetiana var. canadensis G5T5/S1 CRO Black Hills NF Widespread/ Edge Very Low Rare Unknown Moderate Low Canadian enchanter's nightshade

Cirsium aridum G2Q/S2 WY BLM CAR, FRE, Lander BLM Local Endemic/ Core Low Uncommon Moderate Moderate Very High [C. pulcherrimum var. aridum] Sensitive SUB, SWE Pinedale BLM Decline? Cedar Rim thistle Rawlins BLM Rock Springs BLM Cirsium barneby G3G4/S1 CAR?, Kemmerer BLM Regional Endemic/ Very Low Unknown Unknown Moderate Medium Barneby's thistle LIN Edge Cirsium canovirens G4G5/S1 PAR Yellowstone NP Widespread/ Edge Very Low Unknown Unknown Moderate Medium Gray-green thistle Cirsium foliosum G5/S1 Bghrn NF- PAR, SHE Bighorn NF Widespread/ Edge Very Low Unknown Unknown Moderate Low [C. scariosum - misapplied] SOLC Yellowstone NP Leafy thistle Cirsium ownbeyi G3/S2 WY BLM SWE Ashley NF (FGNRA) Regional Endemic/ Low Uncommon Stable? Moderate Medium Ownbey's thistle Sensitive Rock Springs BLM Edge Clarkia pulchella G5?/SH TET Bridger-Teton NF? Widespread/ Edge Very Low Unknown Unknown Unknown Unknown Large-flower clarkia Cleome multicaulis G2G3/S1 WY BLM NAT Casper BLM Disjunct Very Low Uncommon Stable? Moderate Medium [Peritoma multicaulis] Sensitive Pathfinder NWR Many-stemmed spider-flower Collomia grandiflora G5/SH LIN? Widespread/ Edge Very Low Unknown Unknown Unknown Unknown Large-flower collomia

8 2012 Wyoming Plant Species of Concern List

Species Scientific Heritage Rank Federal Status County Managed Area Range Context # Occurs. Abundance Recent Intrinsic Wyoming Common Name Trends Vulnerability Contribution Rank Crassula solieri G4G5/S1 FRE, PAR Shoshone NF Widespread/ Edge Very Low Unknown Unknown Moderate Low [C. aquatica, Tillaea aquatica - Yellowstone NP misapplied] Pygmyweed Cryptantha gracilis G5/S1 SWE Ashley NF (FGNRA) Widespread/ Edge Very Low Rare Unknown Moderate Low Slender cryptantha Rock Springs BLM Cryptantha rollinsii G3/S1 SWE Ashley NF? (FGNRA?) Regional Endemic/ Very Low Rare Unknown Moderate Medium Rollins' cat's-eye Rock Springs BLM Edge Seedskadee NWR Cryptantha subcapitata G2/S2 WY BLM FRE, Wind Lander BLM Local Endemic/ Core Low Uncommon Stable? Moderate Very High Owl Creek miner's candle Sensitive River IR

Cryptogramma stelleri G5/S1 Bghrn NF- FRE, PAR, Bighorn NF Disjunct Low Rare Unknown Moderate Medium Fragile rockbrake SOLC SHE, TET Bridger-Teton NF Shoshone NF Targhee NF Yellowstone NP Cuscuta indecora var. neuropetala G5T5/S1 GOS, PLA, Casper BLM Widespread/ Edge Very Low Unknown Unknown Moderate Low Pretty dodder SHE

Cuscuta megalocarpa G5/S1 GOS, PLA Widespread/ Edge Very Low Unknown Unknown Unknown Unknown [C. umbrosa] Big-fruited dodder Cuscuta occidentalis G4G5/S1 LIN, SWE Fossil Butte NM Widespread/ Edge Very Low Unknown Unknown Moderate Low [C. californica var. breviflora] Kemmerer BLM Western dodder Rock Springs BLM? Cuscuta plattensis G1Q/S1 CON, Casper BLM Local Endemic/ Core? Very Low Unknown Unknown Moderate Very High Wyoming dodder GOS, PLA, WES Cymopterus alpinus G4G5/S1 ALB Medicine Bow NF Widespread/ Edge Very Low Rare Unknown Moderate Low [Oreoxis alpina] Rawlins BLM? Alpine oreoxis Cymopterus evertii G2G3/S2S3 WY BLM HOT, PAR Cody BLM Local Endemic/ Core Low Uncommon Stable? Moderate Very High Evert's waferparsnip Sensitive Shoshone NF Worland BLM Cymopterus williamsii G2G3/S2S3 WY BLM BIG, JOH, Bighorn NF? Local Endemic/ Core Low Uncommon Stable? Moderate Very High Williams' waferparsnip Sensitive NAT, WAS Buffalo BLM Casper BLM Worland BLM Cyperus acuminatus G5/S1 CAM, GOS Fort Laramie NHS Widespread/ Edge Very Low Rare Unknown Moderate Low Short-point flatsedge

Cyperus bipartitus G5/S1 GOS, PLA Fort Laramie NHS Widespread/ Edge Very Low Rare Unknown Moderate Low [C. rivularis] Shining flatsedge Cyperus engelmannii [Incl. in G4Q/S1 PLA Widespread/ Edge Very Low Unknown Unknown Moderate Low C. odorata by some authors ] Engelmann flatsedge

9 2012 Wyoming Plant Species of Concern List

Species Scientific Heritage Rank Federal Status County Managed Area Range Context # Occurs. Abundance Recent Intrinsic Wyoming Common Name Trends Vulnerability Contribution Rank Cyperus erythrorhizos G5/S1 CRO, PLA Widespread/ Edge Very Low Unknown Unknown Moderate Low Red-root flatsedge

Cypripedium montanum G4/S1 USFS R2 JOH, SHE Bighorn NF Buffalo Widespread/ Edge Low Rare Moderate Moderate Low Mountain lady-slipper Sensitive BLM Decline Cypripedium parviflorum var. G5T5/S2 USFS R2 BIG, CRO, Bighorn NF Disjunct Low Rare Moderate Moderate Medium pubescens Sensitive FRE, JOH, Black Hills NF Decline [C. calceolus var. pubescens; SHE, WAS C. pubescens] Wind River Large yellow lady-slipper IR Dalea cylindriceps G3G4/S2 GOS, Casper BLM Widespread/ Edge Low Unknown Unknown Moderate Low Andean prairie-clover LAR, PLA Fort Laramie NHS? Dalea enneandra G5/S1 CRO, WES Newcastle BLM Widespread/ Edge Very Low Rare Unknown Moderate Low Nine-anther prairie-clover

Dalea villosa var. villosa G5T5/S1 GOS, LAR Casper BLM Widespread/ Edge Very Low Unknown Unknown Moderate Low Silky prairie-clover

Delphinium ramosum G4/S1 LAR FE Warren AFB Regional Endemic/ Very Low Rare Unknown Moderate Medium Mountain larkspur Edge Deschampsia danthonioides G5/S1 FRE, PAR , Grand Teton NP Widespread/ Edge Very Low Unknown Unknown Moderate Low Annual hairgrass TET Lander BLM Shoshone NF Yellowstone NP Descurainia pinnata var. paysonii G5T3?/S2 CAR, SWE Ashley NF (FGNRA) Regional Endemic/ Low Uncommon Unknown Low Medium [D. incisa ssp. paysonii] Rawlins BLM Edge Payson's tansymustard Rock Springs BLM

Descurainia torulosa G2/S2 USFS R2 FRE, PAR, Bridger-Teton NF Local Endemic/ Core Low Rare Unknown Moderate Very High Wyoming tansymustard Sensitive SWE, TET Cody BLM? USFS R4 Rock Springs BLM Sensitive WY Shoshone NF BLM Sensitive

Dichanthelium linearifolium G5/S1 MBTB-SOLC ALB, CRO, Black Hills NF Disjunct Very Low Unknown Unknown Moderate Medium [Panicum linearifolium] WES Medicine Bow NF Slim-leaf witchgrass

Diphasiastrum complanatum G5/S1 USFS R2 CRO Black Hills NF Disjunct Very Low Rare Stable? Moderate Medium [Lycopodium complanatum] Sensitive Ground cedar Dodecatheon jeffreyi ssp. jeffreyi G5T3T5/S1 TET Grand Teton NP Widespread/ Edge Very Low Unknown Unknown Moderate Low Jeffrey's shootingstar

Downingia laeta G5/S1 ALB, CAR, Kemmerer BLM? Widespread/ Edge Very Low Rare Unknown Moderate Low Great Basin downingia UIN Rawlins BLM

10 2012 Wyoming Plant Species of Concern List

Species Scientific Heritage Rank Federal Status County Managed Area Range Context # Occurs. Abundance Recent Intrinsic Wyoming Common Name Trends Vulnerability Contribution Rank Draba borealis G4/S2 Bridger-Teton LIN, PAR, Bridger-Teton NF Disjunct Low Rare Stable? Moderate Medium Boreal draba NF Forest SUB, TET Grand Teton NP Sensitive Natl Elk Refuge Shoshone NF Yellowstone NP Draba fladnizensis G4/S2 Bghrn NF- FRE, JOH, Bighorn NF Regional Endemic/ Low Unknown Stable? Moderate Medium [D. f. var. pattersonii] SOLC LIN, PAR, Bridger-Teton NF Edge White arctic whitlow-grass TET Grand Teton NP Shoshone NF Targhee NF Draba glabella G4G5/SH PAR Shoshone NF Disjunct Very Low Unknown Unknown Unknown Unknown Rock whitlow-grass

Draba globosa G3/S3 USFS R4 ALB, FRE, Bridger-Teton NF Regional Endemic/ Moderate Rare Stable Moderate High [D. apiculata, D. a.var. apiculata; Sensitive LIN, PAR, Grand Teton NP Edge D. densifolia var. apiculata] SUB, TET Medicine Bow NF Rockcress draba Shoshone NF Targhee NF Yellowstone NP Draba juniperina G2G3Q/S2 SWE, UIN Ashley NF (FGNRA) Regional Endemic/ Low Uncommon Stable Moderate High [D. oligosperma var. juniperina, Rock Springs BLM Core incl. in D. pectinipila in FNA] Uinta draba

Draba paysonii var. paysonii G5T3/S2 FRE, LIN, Bridger-Teton NF Regional Endemic/ Low Rare Unknown Moderate High [D. paysonii] Payson's draba PAR, SUB Shoshone NF Core? Yellowstone NP Draba paysonii var. treleasii G5T4T5/S2 FRE, PAR Shoshone NF Widespread/ Edge Low Rare Unknown Moderate Low [D. novolympica] Yellowstone NP Trelease's draba Draba pectinipila G1Q/S1 PAR Shoshone NF Local Endemic/ Core Very Low Rare Stable? High Very High [D. oligosperma var. pectinipila] Comb-hair whitlow-grass

Draba porsildii G3G4/S2 FRE, HOT, Bridger-Teton NF Widespread/ Edge Low Unknown Unknown Moderate Low [Incl. vars. brevicula and PAR, SUB Shoshone NF porsildii] Porsild's whitlow-grass Draba spectabilis var. oxyloba G3G4 T3Q/SH MBNF-SOLC CAR Medicine Bow NF Regional Endemic/ Very Low Unknown Large Unknown Unknown Showy draba Edge Decline? Dryopteris expansa G5/S1 PAR, TET Grand Teton NP Widespread/ Edge Very Low Rare Stable Moderate Low [D. assimilis;D. carthusiana - Shoshone NF misapplied] Yellowstone NP Spreading woodfern Dulichium arundinaceum G5/S1 TET Yellowstone NP Disjunct Very Low Rare Stable Moderate Medium Three-way sedge Eleocharis bella G5/S1 TET Grand Teton NP Widespread/ Edge Very Low Unknown Unknown Moderate Low Delicate spikerush

11 2012 Wyoming Plant Species of Concern List

Species Scientific Heritage Rank Federal Status County Managed Area Range Context # Occurs. Abundance Recent Intrinsic Wyoming Common Name Trends Vulnerability Contribution Rank Eleocharis flavescens var. G5T2T3Q/S2 PAR, TET Grand Teton NP? JDR Disjunct Low Rare Stable Moderate Medium thermalis [Incl. in var. flavescens Parkway by some authors] Yellowstone NP Warm Springs spikerush

Eleocharis ovata G5/S1 CRO Black Hills NF Widespread/ Edge Very Low Unknown Unknown Moderate Low [E. obtusa var. ovata] Ovate spike-rush Eleocharis parvula G5/S1 GOS Widespread/ Edge Very Low Unknown Unknown Moderate Low [E. p. var. anachaeta] Small spike-rush Eleocharis tenuis var. borealis G5/ S1S2 USFS R2 CRO, Black Hills NF Widespread/ Edge Low Unknown Unknown Moderate Low [E. elliptica] Sensitive PLA, TET Medicine Bow NF Boreal spikerush Yellowstone NP Elymus simplex var. luxurians G4?QTNR/ WY BLM SWE Rock Springs BLM Local Endemic/ Core Very Low Uncommon Stable Moderate Very High [Leymus simplex var. luxurians] S1S2 Sensitive Long-awned alkali wild-rye

Elymus triticoides G4G5/SH ALB Hutton Lake NWR Widespread/ Edge Very Low Unknown Unknown Unknown Unknown [Leymus triticoides] Creeping wildrye

Elymus villosus G5/S1S2 CRO Black Hills NF Widespread/ Edge Very Unknown Unknown Moderate Low Hairy wild-rye Devils Tower NM Low Newcastle BLM Ephedra cutleri (E. viridis var. G5T4T5/S1 SWE Rock Springs BLM Widespread/ Edge Very Unknown Unknown Moderate Low viscida] Cutler's Mormon tea Low

Ephedra viridis G5/SH SWE Rock Springs BLM Widespread/ Edge Very Low Unknown Moderate Moderate Unknown [E. v. var. viridis] Decline? Green Mormon tea Epipactis gigantea G5/S1 USFS R2 BIG, TET Grand Teton NP Widespread/ Edge Very Low Rare Stable High Low Giant helleborine Sensitive Yellowstone NP Equisetum fluviatile G5/S1 PAR, TET Grand Teton NP? Widespread/ Edge Very Low Rare Stable? Moderate Low Water horsetail Shoshone NF Yellowstone NP Equisetum scirpoides G5/S1 CRO Black Hills NF Disjunct Very Low Rare Stable Moderate Medium Dwarf scouring rush Equisetum sylvaticum G5/S2 Bgrhn NF- CRO, Bighorn NF Disjunct Low Rare Unknown Low Medium Woodland horsetail SOLC JOH, SHE Black Hills NF Eragrostis hypnoides G5/S1 GOS, PLA, Widespread/ Edge Very Low Rare Unknown Moderate Low Teal love grass SHE Ericameria discoidea var. linearis G4G5T4/ S2 USFS R4 FRE, LIN?, Bridger-Teton NF Regional Endemic/ Low Uncommon? Stable? Moderate Medium [E. linearis; Haplopappus Sensitive PAR, SUB, Kemmerer BLM? Edge macronema var. linearis] TET, Wind Shoshone NF Narrowleaf goldenweed River IR Yellowstone NP

12 2012 Wyoming Plant Species of Concern List

Species Scientific Heritage Rank Federal Status County Managed Area Range Context # Occurs. Abundance Recent Intrinsic Wyoming Common Name Trends Vulnerability Contribution Rank Ericameria winwardii G4G5T1/S1 LIN Kemmerer BLM Local endemic/ Core Very Low Rare Stable Moderate Very High [E. discoidea var. winwardii] Winward's narrowleaf goldenweed Erigeron compactus var. G4G5/S1 SWE Rawlins BLM Regional Endemic/ Very Low Unknown Unknown Moderate Medium consimilis Rock Springs BLM Edge [E. consimilis] San Rafael daisy Erigeron elatior G4/S2 ALB, CAR Medicine Bow NF Regional Endemic/ Low Uncommon Unknown Moderate Medium Tall fleabane Rawlins BLM? Edge Erigeron humilis G5/S2 Bghrn NF- BIG, FRE, Bighorn NF Widespread/ Edge Low Rare Unknown Moderate Low Low fleabane SOLC PAR, SUB Bridger-Teton NF Shoshone NF Erigeron lanatus G3G4/S1 USFS R4 SUB, TET Bridger-Teton NF Disjunct Very Low Rare Stable? Moderate Medium Woolly fleabane Sensitive Grand Teton NP Erigeron pinnatisectus G4/S2 ALB, CAR Medicine Bow NF Regional Endemic/ Low Uncommon Stable? Moderate Medium Pinnate fleabane Edge Eriogonum brevicaule var. canum G3G4/S2 BIG, PAR, Bighorn Canyon NRA Regional Endemic/ Low Abundant Stable Moderate High [E. lagopus] SHE Cody BLM Edge Rabbit buckwheat Worland BLM Eriogonum corymbosum var. G5T5/S1 SWE Rock Springs BLM Widespread/ Edge Very Low Unknown Unknown Moderate Low corymbosum Crisp-leaf wild buckwheat Eriogonum divaricatum G4G5/S1 LIN, SUB, Kemmerer BLM Widespread/ Edge Very Low Uncommon Unknown Moderate Low Divergent wild buckwheat SWE, UIN Pinedale BLM Rock Springs BLM Eriogonum exilifolium G3/S2 USFS R2 ALB, CAR Medicine Bow NF Regional Endemic/ Low Uncommon Unknown Moderate High Slender-leaved buckwheat Sensitive Rawlins BLM Core Eriogonum hookeri G5/S1 CAR, SWE Rawlins BLM? Widespread/ Edge Very Low Unknown Unknown Moderate Low Hooker wild buckwheat Rock Springs BLM Eriogonum mancum G4/S1 BIG, PAR Cody BLM Regional Endemic/ Very Low Unknown Unknown Moderate Medium Mancos wild buckwheat Edge Eriogonum pauciflorum var. G5TNRQ/S1 PLA, GOS Camp Guernsey TA Regional Endemic/ Very Low Unknown Unknown Moderate Medium nebraskense [E. x nebraskense] Edge Nebraska buckwheat Eriogonum umbellatum var. G5T1/S1 TET Yellowstone NP Local Endemic/ Core Very Low Rare Stable Moderate Very High cladophorum Yellowstone sulfur-flower wild buckwheat Eriophorum callitrix G5/S1 FRE, PAR Shoshone NF Disjunct Very Low Rare Stable? Moderate Medium [E. c. var. callitrix] Sheathed cotton-grass Eriophorum scheuchzeri G5/S2 FRE, PAR, Bridger-Teton NF Disjunct Low Rare Unknown Moderate Medium Scheuchzer cotton-grass SUB Shoshone NF Eriophorum viridicarinatum G5/S2 PAR, TET Grand Teton NP Natl Disjunct Low Rare Stable Moderate Medium Green keeled cotton-grass Elk Refuge Shoshone NF Yellowstone NP 13 2012 Wyoming Plant Species of Concern List

Species Scientific Heritage Rank Federal Status County Managed Area Range Context # Occurs. Abundance Recent Intrinsic Wyoming Common Name Trends Vulnerability Contribution Rank Eritrichum howardii G4/S2 Bghrn NF- JOH, PAR, Bighorn NF Regional Endemic/ Low Uncommon Unknown Moderate Medium Howard forget-me-not SOLC SHE Buffalo BLM Edge Cody BLM Shoshone NF Euphorbia exstipulata G5/SH PLA Casper BLM? Disjunct Very Low Unknown Unknown Unknown Unknown [E. e. var. exstipulata] Square-seeded spurge Euphorbia hexagona G5/S1 GOS, PLA Camp Guernsey TA Widespread/ Edge Very Low Rare Unknown Moderate Low Six-angle spurge Casper BLM Eustoma grandiflorum G5/S1 GOS, NAT, Widespread/ Edge Very Low Rare Unknown Moderate Low [E. russellianum, E. exaltatum ssp. PLA russellianum] Showy prairie-gentian Euthamia graminifolia var. major G5T5/S1 MBNF-SOLC ALB, PLA Camp Guernsey TA ? Widespread/ Edge Very Low Unknown Unknown Moderate Low [E. g. var. graminia, Solidago Casper BLM graminifolia var. major], ] Medicine Bow NF? Flat-top fragrant goldenrod

Festuca hallii G4/S2 USFS R2 ALB, Bighorn NF? Widespread/ Edge Low Uncommon Unknown Moderate Low [F, altaica ssp. hallii; incl. in Sensitive JOH?, PAR Cody BLM F. scabrella by some authors] Medicine Bow NF Hall's fescue Shoshone NF Festuca viviparoideavar. G4G5TNR/S1 FRE, PAR, Bridger-Teton NF Disjunct Very Unknown Unknown Moderate Medium krajinae [F. vivipara - SUB Shoshone NF Low misapplied] Northern fescue Filago prolifera G5/S1 CRO, Camp Guernsey TA? Widespread/ Edge Very Low Rare Stable? Low Low [Diaperia prolifera, Evax NAT, PLA Casper BLM prolifera] Devils Tower NM Rabbit tobacco Fimbristylis puberula var. interior G5T5/S1 NIO Widespread/ Edge Very Low Rare Unknown Moderate Low Hairy fimbry Froelichia gracilis G5/SH WES Widespread/ Edge Very Low Unknown Unknown Moderate Unknown Slender cottonweed Galium coloradoense G4/S1 SWE Rawlins BLM Widespread/ Edge Very Low Unknown Unknown Moderate Low [G. multiflorum var. Rock Springs BLM coloradoense] Colorado bedstraw Gaura neomexicana ssp. G3T2/S2 USFWS LAR, PLA FE Warren AFB Regional Endemic/ Low Uncommon Stable? Moderate High coloradensis [Oenothera Threaten. Core coloradensis ssp. coloradensis] Colorado butterfly plant Gentiana affinis var. bigelovii G5T4/S1 MBTB-SOLC ALB, LAR Medicine Bow NF Widespread/ Edge Very Low Rare Unknown Moderate Low Bigelow's prairie gentian Gentianella propinqua G5/S1 PAR, TET Shoshone NF Widespread/ Edge Very Low Rare Unknown Moderate Low [Gentiana propinqua] Yellowstone NP Four-part gentian Gentianopsis simplex G5/S1 TET Bridger-Teton NF Widespread/ Edge Very Low Rare Unknown Moderate Low [Gentianella simplex, Gentiana JDR Parkway simplex] Hiker's gentian Yellowstone NP 14 2012 Wyoming Plant Species of Concern List

Species Scientific Heritage Rank Federal Status County Managed Area Range Context # Occurs. Abundance Recent Intrinsic Wyoming Common Name Trends Vulnerability Contribution Rank Glandularia bipinnatifida G5/S1 CRO, FRE Devils Tower NM Widespread/ Edge Very Low Very Rare Stable Low Low [Verbena bipinnatifida] Dakota vervain Glossopetalon spinescens var. G5T3/S1 SWE Ashley NF (FGNRA) Regional Endemic/ Very Low Rare Stable Moderate Medium meionandrum Rock Springs BLM Edge [Forsellesia meionandra] Utah greasebush Gymnocarpium dryopteris G5/S2 MBNF-SOLC CAR, Black Hills NF Widespread/ Edge Low Rare Moderate Low Moderate [incl. G. disjunctum & G. x CRO, PAR, Grand Teton NP Decline? brittonianum] TET Medicine Bow NF Oak fern Yellowstone NP Helianthemum bicknellii G5/S1 CRO Black Hills NF Widespread/ Edge Very Low Rare Stable Moderate Low [Crocanthemum bicknellii] Devils Tower NM Plains frostweed Newcastle BLM Helictotrichon mortonianum G4/S1 FRE Shoshone NF Disjunct Very Low Rare Unknown Moderate Medium Alpine oatgrass Hesperochiron californicus G4G5/S1 SUB, UIN Pinedale BLM Widespread/ Edge Very Low Rare Unknown Moderate Low California hesperochiron Hesperostipa neomexicana G4G5/S1 GOS, PLA Casper BLM Disjunct Very Low Rare Unknown Moderate Medium [Stipa neomexicana] Guernsey SP New Mexico needlegrass Heterocodon rariflorus G5/SH TET Targhee NF Widespread/ Edge Very Low Unknown Unknown Unknown Unknown Western pearl-flower Heterotheca pumila G4/S1 ALB, CAR Medicine Bow NF Regional Endemic/ Very Low Rare? Unknown Moderate Medium [Incl. in Chrysopsis villosa by Edge Cronquist] Little golden-aster Huperzia haleakalae G4G5/S1 TET Grand Teton NP Disjunct Very Low Unknown Unknown Moderate Medium [Lycopodium selago var. haleakalae, Huperzia selago - misapplied] Fir clubmoss Hymenopappus tenuifolius G5/SH CRO Black Hills NF? Widespread/ Edge Very Low Unknown Unknown Unknown Unknown Chalk-hill woollywhite Ionactis alpina G5/S1 PAR Yellowstone NP Widespread/ Edge Very Low Uncommon Stable Moderate Low [Aster scopulorum] Lava aster Ipomopsis aggregata var. G4G5/S1 ALB, CAR Medicine Bow NF Widespread/ Edge Very Low Rare Unknown Moderate Low tenuituba [I. tenuituba, Gilia aggregata var. macrosiphon] Slender-trumpet ipomopsis Ipomopsis aggregata var. weberi G5T2/S1 USFS R2 CAR Medicine Bow NF Regional Endemic/ Very Low Unknown Unknown Moderate High Weber's scarlet-gilia Sensitive Rawlins BLM Edge Ipomopsis longiflora G5/S1 GOS Widespread/ Edge Very Low Rare Unknown Moderate Low [Gilia longiflora] Longflowered gilia Ipomopsis polycladon G4/S1 SWE Ashley NF (FGNRA) Widespread/ Edge Very Low Rare Unknown Moderate Low [Gilia polycladon] Lavender ipomopsis

15 2012 Wyoming Plant Species of Concern List

Species Scientific Heritage Rank Federal Status County Managed Area Range Context # Occurs. Abundance Recent Intrinsic Wyoming Common Name Trends Vulnerability Contribution Rank Ipomopsis spicata var. robruthii G5 T2/S2 HOT, PAR Shoshone NF Local Endemic/ Core Low Rare Stable? Moderate Very High [I, s.var. robruthiorum] Kirkpatrick's ipomopsis Isoetes occidentalis G4G5/S1 TET Yellowstone NP Widespread/ Edge Very Low Unknown Unknown Moderate Low [I. lacustris var. paupercula] Western quillwort Juncus triglumis var. albescens G5T5/S2 MBNF -SOLC ALB, FRE, Bridger-Teton NF Disjunct Low Rare Stable? Moderate Medium [J. albescens] PAR, SUB Medicine Bow NF Northern white rush Shoshone NF Juncus triglumis var. triglumis G5T5/S1 Bghrn NF- JOH, PAR Bighorn NF Widespread/ Edge Very Low Rare Unknown Moderate Low Three-flower rush SOLC Shoshone NF Juncus vaseyi G5?/S1 MBNF-SOLC ALB, FRE, Bridger-Teton NF Widespread/ Edge Very Low Rare Unknown Moderate Low Vasey rush SUB, TET Medicine Bow NF Yellowstone NP Kelloggia galioides G5/S1 FRE?, Bridger-Teton NF Widespread/ Edge Low Rare Unknown Moderate Low Milk kelloggia LIN?, PAR, Grand Teton NP TET Shoshone NF Yellowstone NP Kobresia sibirica G5/S1 PAR Shoshone NF Disjunct Very Low Rare Unknown Moderate Medium [K. macrocarpa, K. schoenoides] Siberian kobresia Kobresia simpliciuscula G5/S1 USFS R2 PAR, SUB Pinedale BLM Disjunct Very Low Rare Stable? Moderate Medium Simple kobresia Sensitive Shoshone NF Koenigia islandica G4/S1 FRE, PAR Shoshone NF Disjunct Low Rare Unknown Moderate Medium Koenigia Lathyrus eucosmus G4G5/S1 FRE Lander BLM Disjunct Very Low Unknown Unknown Moderate Medium Seemly sweetpea Lathyrus lanszwertii var. G4G5T4/S1? HOT?, Kemmerer BLM Widespread/ Edge Very Unknown Unknown Moderate Low lanszwertii UIN, Wasatch-Cache NF? Low? Nevada sweetpea WAS? Worland BLM? Lechea intermedia G5/S1 CRO Black Hills NF Disjunct Very Low Rare Unknown Moderate Medium Narrowleaf pinweed Lemna valdiviana G5/S1 PAR, TET Grand Teton NP Widespread/ Edge Very Low Unknown Unknown Low Low Pale duckweed Yellowstone NP Lepidium integrifolium G2G3/S1 WY BLM LIN, UIN Cokeville NWR Fossil Regional Endemic/ Very Low Uncommon Unknown Moderate High [L. i. var. integrifolium] Sensitive Butte NM Core? Entire-leaved peppergrass Kemmerer BLM Lesquerella arenosa var. argillosa G5T4/S1 WY BLM NIO Newcastle BLM Regional Endemic/ Very Low Uncommon Stable Moderate Medium [Physaria arenosa ssp. argillosa] Sensitive Edge Sidesaddle bladderpod Lesquerella carinata var. carinata G3G4 FRE?, TET Bridger-Teton NF Regional Endemic/ Low Uncommon Stable Moderate Medium [Physaria carinata ssp. carinata] T3T4/S2 Grand Teton NP Edge Keeled bladderpod Natl Elk Refuge Targhee NF Lesquerella fremontii G2/S2 USFS R2 FRE Lander BLM Local Endemic/ Core Low Uncommon Stable Moderate Very High [Physaria fremontii] Sensitive Shoshone NF Fremont bladderpod WY BLM Sensitive 16 2012 Wyoming Plant Species of Concern List

Species Scientific Heritage Rank Federal Status County Managed Area Range Context # Occurs. Abundance Recent Intrinsic Wyoming Common Name Trends Vulnerability Contribution Rank Lesquerella macrocarpa G2/S2 WY BLM FRE, LIN, Kemmerer BLM Local Endemic/ Core Low Uncommon Moderate Moderate Very High [Physaria macrocarpa] Sensitive SUB, SWE Pinedale BLM Decline? Large-fruited bladderpod Rock Springs BLM Lesquerella multiceps G3/S1 WY BLM LIN Targhee NF Regional Endemic/ Very Low Rare Stable Moderate Medium [Physaria multiceps] Sensitive Edge Western bladderpod Lesquerella parvula G3?Q/S2 CAR, Kemmerer BLM Regional Endemic/ Low Rare Stable? Moderate Medium [L. alpina var. parvula, Physaria SWE, UIN Medicine Bow NF? Edge parvula] Rock Springs BLM Narrowleaved bladderpod Wasatch-Cache NF Lesquerella prostrata G2G3/S2 WY BLM LIN, UIN Kemmerer BLM Regional Endemic/ Low Uncommon Stable? Moderate High [Physaria prostrata] Sensitive Core Prostrate bladderpod Liatris lancifolia G4/S1 GOS Widespread/ Edge Very Low Rare Moderate Moderate Low Lance-leaf gay-feather Decline Ligularia bigelovii var. hallii G4?T3T4/ S1 MBNF-SOLC ALB, CAR Medicine Bow NF Widespread/ Edge Very Rare Stable Moderate Low [Senecio bigelovii var. hallii] Low Bigelow's groundsel Ligusticum tenuifolium G5/S1? MBNF-SOLC CAR Medicine Bow NF Widespread/ Edge Very Low Rare Unknown Moderate Low Slender-leaved lovage Linanthus watsonii G3G5/S1 Bghrn NF- FRE, HOT, Ashley NF (FGNRA) Widespread/ Edge Very Low Rare Stable? Moderate Low [Leptodactylon watsonii] SOLC SWE, Bighorn NF Watson's prickly-phlox WAS, Cody BLM Wind River IR Lipocarpha drummondii G4G5/S1 ALB, GOS, Fort Laramie NHS Widespread/ Edge Very Low Rare Unknown Moderate Low [Hemicarpha drummondii] PLA, WES Dwarf bulrush Listera convallarioides G5/S1S2 Bghrn NF- ALB, Bighorn NF Bridger- Widespread/ Edge Low Rare Unknown High Low Broad-leaved twayblade SOLC, BlHll CON, SHE, Teton NF NF-SOLC, TET Grand Teton NP MBNF-SOLC Medicine Bow NF Targhee NF Yellowstone NP Lithospermum multiflorum G4/SH LAR Disjunct Very Low Unknown Unknown Unknown Unknown Many-flowered gromwell Lobelia siphilitica G5/S1 GOS, LAR, Ft. Laramie NHS Widespread/ Edge Very Low Rare Unknown Moderate Low Great blue lobelia NIO Loeflingia squarrosa [Incl. var. G5/S1 CRO, Newcastle BLM? Rock Widespread/ Edge Very Low Unknown Unknown Moderate Low artemisiarum and var. texanum] SWE, WES Springs BLM? Loeflingia Lomatium attenuatum G3/S2 PAR Cody BLM Regional Endemic/ Moderate Uncommon Stable? Moderate High Absaroka biscuitroot Shoshone NF Core Lomatium triternatum var. G5T4T5/S1 LIN Fossil Butte NM Regional Endemic/ Very Low Rare Unknown Moderate Medium anomalum [Incl. var. triternatum] Kemmerer BLM Edge? Ternate desert-parsley

17 2012 Wyoming Plant Species of Concern List

Species Scientific Heritage Rank Federal Status County Managed Area Range Context # Occurs. Abundance Recent Intrinsic Wyoming Common Name Trends Vulnerability Contribution Rank Lomatogonium rotatum G5/S2 MBNF-SOLC ALB, CAR, Medicine Bow NF Disjunct Low Rare Unknown Moderate Medium Marsh felwort LAR Mortenson Lake NWR

Luzula glabrata var. hitchcockii G5T4/ S2 PAR, TET Bridger-Teton NF Widespread/ Edge Low Rare Unknown Moderate Low [L. hitchcockii] Grand Teton NP Smooth wood-rush Shoshone NF Targhee NF Yellowstone NP Lycopodium dendroideum G5/S2 USFS R2 CRO Black Hills NF Disjunct Low Uncommon Unknown Moderate Medium Treelike clubmoss Sensitive Lycopus uniflorus G5/S1 CRO, TET Black Hills NF Widespread/ Edge Very Low Unknown Unknown Moderate Low Northern bugleweed Yellowstone NP Lysimachia thyrsiflora G5/S1 ALB, TET Yellowstone NP Widespread/ Edge Very Low Rare Unknown Moderate Low Swamp loosestrife Lythrum alatum var. alatum G5T5/S1 CRO, NIO, Casper BLM Widespread/ Edge Very Low Rare Unknown Moderate Low Winged loosestrife PLA

Machaeranthera bigelovii var. G4G5T3T4 ALB, CRO Bamforth NWR? Regional Endemic/ Low Rare Unknown Moderate Medium bigelovii /S2 Black Hills NF Edge [Dieteria bigelovii var. bigelovii] Medicine Bow NF Bigelow's tansy-aster Mortenson Lake NWR? Machaeranthera coloradoensis G3 /S2 USFS R2 ALB, CAR Medicine Bow NF Regional Endemic/ Low Rare Unknown Moderate High [Haplopappus coloradoensis] Sensitive Rawlins BLM Core Colorado tansy-aster Marsilea vestita var. oligospora G5/S1 SUB, TET Bridger-Teton NF Widespread/ Edge Very Low Rare Unknown Moderate Low [M. oligospora] Grand Teton NP JDR Pepperwort Parkway

Mentzelia rusbyi G4?/S1 ALB, CAR Medicine Bow NF? Widespread/ Edge Very Low Unknown Unknown Moderate Low [Nuttallia rusbyi] Rawlins BLM? Rusby's stickleaf Mentzelia sinuata G3/S2 ALB, LAR Rawlins BLM? Regional Endemic/ Low Unknown Unknown Moderate High Wavy-leaf stickleaf Edge Mentzelia speciosa G3?/S1 LAR Regional Endemic/ Very Low Unknown Unknown Moderate Medium [Nuttallia speciosa] Edge Jeweled blazingstar Mimulus nanus ssp. nanus G5T4/S1 TET Yellowstone NP Widespread/ Edge Very Low Rare Stable Moderate Low Dwarf purple monkeyflower

Mimulus rubellus G5/S1 CAR, Casper BLM Widespread/ Edge Very Low Rare Stable Moderate Low Ciliolate-toothed monkeyflower NAT, Rawlins BLM PAR? Yellowstone NP? Minuartia filiorum G3G4/S1 SUB, TET Bridger-Teton NF Regional Endemic/ Very Low Rare Unknown Moderate Medium [Arenaria filiorum; A. rubella var. Grand Teton NP Edge filiorum, incl. in Minuartia macrantha in FNA] Thread-branch stitchwort

18 2012 Wyoming Plant Species of Concern List

Species Scientific Heritage Rank Federal Status County Managed Area Range Context # Occurs. Abundance Recent Intrinsic Wyoming Common Name Trends Vulnerability Contribution Rank Monarda pectinata G5/S1 GOS Casper BLM Widespread/ Edge Very Low Rare Unknown Moderate Low Plains lemon bee-balm Monardella odoratissima var. G4G5T3T5/S1 LIN Bridger-Teton NF Widespread/ Edge Very Low Rare Unknown Moderate Low glauca Mountain wild-mint Montiastrum lineare G5/S1 TET Yellowstone NP Widespread/ Edge Very Low Rare Stable Moderate Low [Montia linearis] Linearleaf miner's-lettuce Muhlenbergia glomerata G5/S2 CRO?, Black Hills NF? Grand Widespread/ Edge Low Rare Stable? Moderate Low [Incl. in M. racemosa by some FRE, Teton NP Natl Elk authors] GOS?, Refg. Marsh muhly PAR, SUB, Shoshone NF TET, Worland BLM? WAS? Yellowstone NP Muhlenbergia montana G5/S1 CAR, LAR Curt Gowdy SP Widespread/ Edge Very Low Rare Unknown Moderate Low Mountain muhly Muhlenbergia torreyi G4/S1 LAR Widespread/ Edge Very Low Unknown Unknown Moderate Low Ring muhly Musineon vaginatum G3G4/S2 Bghrn NF- BIG, SHE Bighorn NF Regional Endemic/ Low Rare Stable Moderate Medium Sheathed musineon SOLC Cody BLM Edge Myosotis verna G5/S1 CRO Black Hills NF Widespread/ Edge Very Low Rare Unknown Moderate Low [M. virginiana auct. non] Spring forget-me-not Myriophyllum quitense G4?/S1 TET Yellowstone NP Disjunct Very Low Unknown Unknown Moderate Medium Andean water-milfoil Myriophyllum verticillatum G5/S1 FRE, PAR, Grand Teton NP Widespread/ Edge Very Low Unknown Unknown Moderate Low Whorled water-milfoil TET Shoshone NF Yellowstone NP Najas guadalupensis G5/S1 SUB, TET Bridger-Teton NF Widespread/ Edge Very Low Unknown Unknown Moderate Low Southern naiad Grand Teton NP Nothocalais troximoides G5/S1 PAR, SHE Cody BLM Widespread/ Edge Very Low Rare Unknown Moderate Low [Microseris troximoides] Grand Teton NP False agoseris Yellowstone NP Oenothera canescens G4G5/S1 GOS Widespread/ Edge Very Low Rare Unknown Moderate Low Spotted evening-primrose Oenothera howardii G3G4/S1 LAR Regional Endemic/ Very Low Rare Unknown Moderate Medium Howard's evening-primrose Edge Oenothera laciniata G5/S1 CAM, CRO Black Hills NF Devils Widespread/ Edge very Low Unknown Unknown Moderate Low Cut-leaved evening-primrose Tower NM Onoclea sensibilis G5/S1 CRO Black Hills NF Widespread/ Edge Very Low Rare Unknown Moderate Low Sensitive fern Ophioglossum pusillum G5/S1 TET Yellowstone NP Disjunct Very Low Rare Unknown Moderate Medium [O. vulgatum] Adder's-tongue Orobanche corymbosa var. G4T4/S1S2 PAR, SUB, Bridger-Teton NF Widespread/ Edge Low Rare Moderate Moderate Low corymbosa TET Grand Teton NP [O. californica var. corymbosa] Shoshone NF Flat-top broomrape Yellowstone NP 19 2012 Wyoming Plant Species of Concern List

Species Scientific Heritage Rank Federal Status County Managed Area Range Context # Occurs. Abundance Recent Intrinsic Wyoming Common Name Trends Vulnerability Contribution Rank Orobanche ludoviciana var. G5T5/SH PAR, TET Grand Teton NP Widespread/ Edge Very Low Unknown Unknown Unknown Unknown arenosa [Incl. in var. Yellowstone NP ludoviciana by some authors] Louisiana broomrape Oxytheca dendroidea G4/SH FRE, HOT, Lander BLM? Widespread/ Edge Very Low Unknown Unknown Moderate Unknown Tree-like oxytheca SWE Rock Springs BLM ? Worland BLM? Oxytropis besseyi var. G5T2/S1 FRE, NAT, Lander BLM Regional Endemic/ Very Rare Unknown Moderate High obnapiformis SWE, UIN Kemmerer BLM Edge? Low [O. obnapiformis] Maybell locoweed Packera crocata G4/S1? MBNF-SOLC ALB, SWE Medicine Bow NF Regional Endemic/ Very Low Rare Unknown Moderate Medium [Senecio crocatus] Rock Springs BLM Edge Saffron groundsel Packera pseudaurea var. flavula G5T2T4/S1 MBNF -SOLC ALB, CAR, FE Warren AFB Widespread/ Edge Very Low Unknown Unknown Moderate Low [Senecio pseudaureus var. LAR Medicine Bow NF flavulus] Rawlins BLM Streambank groundsel Paeonia brownii G5/S1 TET Grand Teton NP Widespread/ Edge Very Low Rare Unknown Moderate Low Brown's peony Targhee NF Yellowstone NP Palafoxia rosea var. macrolepis G5T4/S1 TBNG - SOLC CON, GOS Thunder Basin NG Disjunct Very Low Rare Unknown Moderate Medium Rosy palafoxia Papaver kluanense G3G4/S2 Bghrn NF- BIG, FRE, Bighorn NF Disjunct Low Rare Stable? Moderate Medium [P. radicatum ssp. kluanensis, SOLC JOH?, Bridger-Teton NF P. lapponicum var. occidentale ] PAR, SUB Cody BLM Alpine poppy Shoshone NF Paronychia jamesii G4/S1 ALB, GOS Widespread/ Edge Very Low Unknown Unknown Moderate Low James nailwort Paronychia pulvinata G3?/S1 ALB, CAR Medicine Bow NF Regional Endemic/ Very Low Rare Stable? Moderate Medium Rocky Mountain nailwort Rawlins BLM Edge Parrya nudicaulis G5/S2 USFS R4 FRE, PAR, Bridger-Teton NF Disjunct Low Uncommon Stable Moderate Medium Naked-stemmed parrya Sensitive SUB, TET Shoshone NF Pectis angustifolia var. G4G5TNR/ S1 TBNG-SOLC CON, Casper BLM? Widespread/ Edge Very Low Rare Unknown Moderate Low angustifolia GOS, PLA Thunder Basin NG Crown-seed fetid-marigold Pedicularis contorta var. G5T3/S2 BIG, JOH, Bighorn NF Regional Endemic/ Low Uncommon Unknown Moderate Medium ctenophora SHE, WAS Buffalo BLM Edge Coil-beaked lousewort Pedicularis oederi G5/S1 PAR Shoshone NF Disjunct Very Low Uncommon Stable? Moderate Medium Oeder's lousewort Pedicularis parryi ssp. G5T2T4Q/S1 BIG?, UIN Bighorn NF? Widespread/ Edge Very Low Unknown Unknown Moderate Low mogollonica Wasatch-Cache NF Mogollon lousewort Pediomelum digitatum G5/S1 GOS Casper BLM Widespread/ Edge Very Low Rare Unknown Moderate Low [Psoralea digitata] Palm-leaved scurfpea

20 2012 Wyoming Plant Species of Concern List

Species Scientific Heritage Rank Federal Status County Managed Area Range Context # Occurs. Abundance Recent Intrinsic Wyoming Common Name Trends Vulnerability Contribution Rank Pediomelum linearifolium G4?/S1 LAR Widespread/ Edge Very Low Rare Unknown Moderate Low [Psoralea linearifolia] Narrowleaf scurfpea Pellaea gastonyi G2G3/S2 CRO Black Hills NF Disjunct Low Rare Unknown Moderate Medium Gastony's cliff-brake Newcastle BLM Pellaea suksdorfiana G5T4?/S1 CRO, PLA, Black Hills NF Widespread/ Edge Very Low Rare Unknown Moderate Low [P. glabella var. simplex] TET Targhee NF Smooth cliff-brake Penstemon absarokensis G2/S2 USFS R2 FRE, PAR, Cody BLM Local Endemic/ Core Moderate Uncommon Stable? Moderate Very High Absaroka beardtongue Sensitive WY Wind River Shoshone NF BLM Sensitive IR?

Penstemon acaulis G2T2/S1 USFS R4 SWE Ashley NF (FGNRA) Local Endemic/ Core Very Low Uncommon Moderate Moderate Very High [P. acaulis var. acaulis] Sensitive WY Rock Springs BLM Decline Stemless beardtongue BLM Sensitive Penstemon angustifolius var. G5T4?/S1 GOS Casper BLM Widespread/ Edge Very Low Rare Unknown Moderate Low caudatus Narrowleaf beardtongue Penstemon cyathophorus G3/S2 MBNF-SOLC CAR Medicine Bow NF Regional Endemic/ Low Rare Stable? Moderate Medium North Park beardtongue Rawlins BLM Edge Penstemon gibbensii G1G2/S1 WY BLM CAR, SWE Rawlins BLM Regional Endemic/ Very Low Rare Moderate Moderate High Gibbens' beardtongue Sensitive Core Decline? Penstemon haydenii G1G2/S1 USFWS CAR Rawlins BLM Regional Endemic/ Very Low Rare Stable? Moderate Medium Blowout penstemon Endanger. Edge Penstemon scariosus var. garrettii G4T3/S1 SWE, UIN Rock Springs BLM Regional Endemic/ Very Low Rare Unknown Unknown Medium Garrett's beardtongue Edge Penstemon watsonii G5/SH UIN Kemmerer BLM? Regional Endemic/ Very Low Unknown Unknown Moderate Unknown Watson beardtongue Edge Penstemon yampaensis G3Q/S1 SWE Rock Springs BLM Regional Endemic/ Very Very Rare Unknown Moderate Medium [P. acaulis var. yampaensis] Edge Low Yampa beardtongue Phacelia alba G4G5/S1 MBNF-SOLC ALB, LAR Medicine Bow NF Widespread/ Edge Very Low Rare Unknown Moderate Low [P. neomexicana var. alba] Rawlins BLM White scorpion-weed Phacelia demissa G5/S1 FRE, SWE Rock Springs BLM Regional Endemic/ Very Low Rare Unknown Moderate Medium [Incl. vars. demissa and knightii] Edge Intermountain phacelia [If recognized, var. knightii is a local endemic/core] Phacelia denticulata G3?/S2 MBNF-SOLC ALB, LAR Medicine Bow NF Regional Endemic/ Low Rare Moderate Moderate Medium Rocky Mountain phacelia Rawlins BLM Edge Decline? Phacelia glandulosa var. deserta G4 T2 Q/ S2 CAR, LIN, Ashley NF (FGNRA) Local Endemic/ Core Low Rare Unknown Moderate Very High Desert glandular phacelia SUB, SWE Kemmerer BLM Pinedale BLM Rawlins BLM Rock Springs BLM

21 2012 Wyoming Plant Species of Concern List

Species Scientific Heritage Rank Federal Status County Managed Area Range Context # Occurs. Abundance Recent Intrinsic Wyoming Common Name Trends Vulnerability Contribution Rank Phacelia incana G3G4/S1 CAR, SWE Ashley NF (FGNRA) Widespread/ Edge Very Low Rare Unknown Moderate Low Western phacelia Rawlins BLM? Rock Springs BLM Phacelia salina G3?Q/S2 CAR, LIN, Pinedale BLM Widespread/ Edge Low Rare Unknown Moderate Low Nelson phacelia SUB, SWE, Rawlins BLM UIN Rock Springs BLM Phacelia tetramera G4/S1 FRE, SWE Rawlins BLM Rock Widespread/ Edge Very Low Rare Unknown Moderate Low Tiny phacelia Springs BLM Philadelphus microphyllus G5?T3T4/ S1 SWE Ashley NF (FGNRA) Widespread/ Edge Very Low Rare Unknown Moderate Low [P. m. var. occidentalis] Rock Springs BLM Little-leaf mock-orange Phippsia algida G5/S1 FRE, PAR, Bridger-Teton NF Disjunct Very Low Rare Unknown Moderate Medium Ice grass SUB Shoshone NF Phlox albomarginata G4/S1 LIN Kemmerer BLM Regional Endemic/ Very Low Unknown Unknown Moderate Medium White-margined phlox Edge Phlox diffusa ssp. scleranthifolia G5TNR/S1 PAR Shoshone NF Widespread/ Edge Very Low Rare Unknown Moderate Low [Incl. in Phlox hoodii by some authors] Diffuse phlox Phryma leptostachya G5/S1 CRO Black Hills NF Widespread/ Edge Very Low Unknown Unknown Moderate Low Lopseed Physalis virginiana G5/S1 CRO, WES Black Hills NF Widespread/ Edge Very Low Unknown Unknown Moderate Low [P. v. var. virginiana] Newcastle BLM Virginia ground-cherry Physaria dornii G1/S1 WY BLM LIN, UIN Kemmerer BLM Local Endemic/ Core Very Low Uncommon Stable Moderate Very High Dorn's twinpod Sensitive Physaria lanata G5T2/S2 USFS R2 BIG, CAM, Bighorn NF Regional Endemic/ Low Uncommon Stable Moderate Very High [P. didymocarpa var. lanata] Sensitive JOH, PAR, Buffalo BLM Core Woolly twinpod SHE, WAS Physocarpus alternans G4/S1 SWE Rock Springs BLM Widespread/ Edge Very Low Unknown Unknown High Low Dwarf ninebark Platanthera orbiculata G5/S1 USFS R2 CRO Black Hills NF Disjunct Very Low Rare Unknown Unknown Medium [Habenaria orbiculata] Sensitive Round-leaved orchid Polemonium micranthum G5/SH PAR Yellowstone NP Widespread/ Edge Very Low Unknown Unknown Moderate Unknown Annual polemonium Polygala verticillata G5/S1 CAM, CRO Black Hills NF Widespread/ Edge Very Low Unknown Unknown Moderate Low [P. verticillata var. isocycla] Newcastle BLM Whorled milkwort Thunder Basin NG Polygonatum biflorum G5/S1 CRO Black Hills NF Widespread/ Edge Very Low Rare Unknown Moderate Low [P. biflorum var. commutatum] Common Solomon's-seal Polygonum spergulariiforme G5T4?/S1 JOH?, Worland BLM Widespread/ Edge Very Low Rare Unknown Moderate Low [P. douglasii var. PAR, SHE, spergulariiforme] WAS Fall knotweed Polypodium saximontanum G3?/S1 ALB, CAR, Medicine Bow NF Regional Endemic/ Very Low Rare Stable? Unknown Medium [P. vulgare var. columbianum] CON Edge Rocky Mountain polypody 22 2012 Wyoming Plant Species of Concern List

Species Scientific Heritage Rank Federal Status County Managed Area Range Context # Occurs. Abundance Recent Intrinsic Wyoming Common Name Trends Vulnerability Contribution Rank Polystichum scopulinum G5/SH TET Targhee NF Widespread/ Edge Very Low Unknown Unknown Moderate Unknown Rock holly-fern Yellowstone NP Populus deltoides var. wislizeni G5T4T5/S1 CAR, SWE Rawlins BLM Widespread/ Edge Very Low Unknown Unknown Moderate Low [P. fremontii var. wislizeni] Fremont cottonwood Porterella carnosula G4/S1 TET, UIN Grand Teton NP Widespread/ Edge Very Low Uncommon Stable Moderate Low Western porterella Wasatch-Cache NF Yellowstone NP Potamogeton amplifolius G5/S1 Bghrn NF- CAR, FRE, Bighorn NF Widespread/ Edge Very Rare Unknown Moderate Low Large-leaved pondweed SOLC JOH, PAR, Bridger-Teton NF Low SUB Medicine Bow NF Shoshone NF Yellowstone NP? Potamogeton diversifolius G5/S1 CAM, Black Hills NF Widespread/ Edge Very Low Rare Unknown Moderate Low Water-thread pondweed CRO Potamogeton friesii G4/S1 CAR, PAR, Bridger-Teton NF Widespread/ Edge Very Low Rare Unknown Moderate Low Fries pondweed TET Grand Teton NP Medicine Bow NF Shoshone NF Yellowstone NP Potamogeton illinoensis G5/S1 ALB, NAT, Bridger-Teton NF Widespread/ Edge Very Low Rare Unknown Moderate Low Illinois pondweed PAR, SUB Lander BLM? Shoshone NF Yellowstone NP Potamogeton nodosus G5/S1 CAR, FRE, Rawlins BLM? Widespread/ Edge Very Low Unknown Unknown Moderate Low Longleaf pondweed PLA, TET, Yellowstone NP Wind River IR Potamogeton obtusifolius G5 /S1 TET Grand Teton NP Disjunct Very Low Unknown Unknown Moderate Medium Blunt-leaf pondweed JDR Parkway Yellowstone NP Potamogeton praelongus G5/S1 Bghrn NF- ALB, JOH, Bighorn NF Widespread/ Edge Very Low Rare Unknown Moderate Medium White-stem pondweed SOLC MBNF- PAR, TET Medicine Bow NF SOLC Shoshone NF Yellowstone NP Potamogeton robbinsii G5/S1 MBNF-SOLC CAR, FRE, Bridger-Teton NF Disjunct Very Low Unknown Large Moderate Medium Flatleaf pondweed SUB, TET Medicine Bow NF Decline? Yellowstone NP Potamogeton strictifolius G5/S1 ALB, PAR, Bridger-Teton NF Disjunct Very Low Unknown Moderate Unknown Medium Strict-leaved pondweed SUB, TET Rawlins BLM Decline? Yellowstone NP Potamogeton zosteriformis G5/S1 TET Grand Teton NP Widespread/ Edge Very Low Unknown Moderate Moderate Low Flatstem pondweed Yellowstone NP Decline? Potentilla ambigens G3/SH ALB Rawlins BLM? Widespread/ Edge Very Low Unknown Unknown Moderate Unknown Giant cinquefoil Potentilla hyparctica G4G5/S1 FRE, SUB Bridger-Teton NF Disjunct Very Low Rare Unknown Moderate Medium [P. nana] Shoshone NF Arctic cinquefoil

23 2012 Wyoming Plant Species of Concern List

Species Scientific Heritage Rank Federal Status County Managed Area Range Context # Occurs. Abundance Recent Intrinsic Wyoming Common Name Trends Vulnerability Contribution Rank Potentilla multisecta [P. G3G4Q/S1 SWE, UIN Kemmerer BLM Widespread/ Edge Very Low Rare Unknown Moderate Low diversifolia var. multisecta] Rock Springs BLM Deep Creek cinquefoil Potentilla subjuga G4/S2 FRE, HOT, Cody BLM Regional Endemic/ Low Rare Unknown Low Medium Twinleaf cinquefoil PAR Shoshone NF Worland Edge BLM Potentilla uniflora G5/S2 FRE, Bridger-Teton NF Widespread/ Edge Low Rare Unknown Moderate Low One-flower cinquefoil HOT?, Shoshone NF PAR, SUB, TET Primula egaliksensis G4/S1 USFS R2 PAR, SUB Bridger-Teton NF Disjunct Very Low Rare Stable? Moderate Medium Greenland primrose Sensitive Shoshone NF BrdgrTtn NF- SOLC Prosartes hookeri G5/S2 CRO Black Hills NF Disjunct Low Rare Unknown Moderate Medium Drops of gold Pseudognaphalium G5T4Q/S1 PAR, TET Yellowstone NP Widespread/ Edge Very Low Rare Stable Moderate Low microcephalum var. thermal [P. thermale; Gnaphalium microcephalum var. thermale] White cudweed Puccinellia cusickii G3G4Q/S1 ALB, CRO, Casper BLM Widespread/ Edge Very Low Unknown Unknown Moderate Low [Incl. in P. nuttalliana by some JOH, NAT authors] Cusick's alkali-grass Pyrrocoma carthamoides var. G4G5T2T3/S2 USFS R2 PAR Cody BLM Regional Endemic/ Low Uncommon Stable? Moderate Medium subsquarrosa Sensitive Shoshone NF Core [Haplopappus carthamoides var. subsquarrosus] Absaroka goldenweed Pyrrocoma clementis var. G3G4T3T4/S1 CAR?, Medicine Bow NF? Widespread/ Edge Very Low Unknown Unknown Moderate Low clementis FRE, Wind Shoshone NF [Haplopappus clementis] River IR Tranquil goldenweed Pyrrocoma clementis var. villosa G3G4T2/S2 USFS R2 BIG, FRE, Bighorn NF Regional Endemic/ Low Uncommon Stable Moderate Very High [P. villosa, Haplopappus villosa] Sensitive JOH, SHE, Shoshone NF Core Hairy tranquil goldenweed WAS, Worland BLM Wind R IR Pyrrocoma crocea var. crocea G4?T4?/ S2 MBNF-SOLC CAR Medicine Bow NF Widespread/ Edge Low Uncommon Unknown Moderate Low [Haplopappus croceus] Rawlins BLM Western goldenweed

Pyrrocoma integrifolia G3?/S1 USFS R2 BIG, FRE, Shoshone NF Regional Endemic/ Very Low Unknown Unknown Moderate Medium [Haplopappus integrifolius] Sensitive PAR, TET, Worland BLM? Edge Entire-leaved goldenweed WAS Yellowstone NP Ranunculus aquatilis var. G5/S1 PAR Yellowstone NP Widespread/ Edge Very Unknown Unknown Unknown Unknown aquatilis [R. aquatilis s.s.; R. a. Low var. hispidulus] White water-crowfoot 24 2012 Wyoming Plant Species of Concern List

Species Scientific Heritage Rank Federal Status County Managed Area Range Context # Occurs. Abundance Recent Intrinsic Wyoming Common Name Trends Vulnerability Contribution Rank Ranunculus flabellaris G5/SH UIN Kemmerer BLM? Widespread/ Edge Very Low Unknown Unknown Moderate Unknown Yellow water-crowfoot Ranunculus gelidus G5/S1 FRE, PAR, Bridger-Teton NF Widespread/ Edge Very Low Rare Unknown Moderate Low [R. verecundus, R. karelinii] TET Shoshone NF Timberline buttercup Rorippa truncata G5/S1S2 FRE, GOS, Bridger-Teton NF?, Widespread/ Edge Very Low Rare Unknown Moderate Low [R. curvipes var. truncata] HOT?, Fort Laramie NHS Wild yellowcress NAT, Pathfinder NWR PAR?, TET? Rubus acaulis G5/S2 USFS R2 ALB?, Bighorn NF Disjunct Low Rare Stable? Moderate Medium [R. arcticus ssp. acaulis] Sensitive CAR, JOH, Medicine Bow NF? Northern blackberry PAR, TET Yellowstone NP [Nagoonberry] Sagittaria latifolia G5/S1 GOS Widespread/ Edge Very Low Unknown Unknown Moderate Low [S. l. var. latifolia] Broadleaf arrowhead Salix barrattiana G5/S1 USFS R2 PAR Shoshone NF Disjunct Very Low Rare Stable Moderate Medium Barratt's willow Sensitive Salix candida G5/S2 USFS R2 ALB, FRE, Bridger-Teton NF Widespread/ Edge Low Rare Stable? Moderate Low Hoary willow Sensitive PAR, SUB, Medicine Bow NF TET Natl Elk Refuge Pinedale BLM Shoshone NF Yellowstone NP Salix myrtillifolia G5/S1 USFS R2 PAR Shoshone NF Disjunct Very Low Rare Unknown Moderate Medium [S. m.var. myrtillifolia] Sensitive Myrtleleaf willow Salix serissima G4/S1 USFS R2 ALB Medicine Bow NF Disjunct Very Low Rare Stable Moderate Medium Autumn willow Sensitive Sambucus cerulea. var. cerulea G5?/S1? JOH, SHE, Bighorn NF? Widespread/ Edge Very Low Unknown Unknown Moderate Low [ S. nigra ssp. cerulea] SWE Rock Springs BLM Blue elderberry Saussurea weberi G2G3/S2 USFS R4 FRE, SUB, Bridger-Teton NF Regional Endemic/ Low Uncommon Stable? Moderate Medium [Incl. in S. densa by some authors] Sensitive TET Shoshone NF Edge Weber's saw-wort Saxifraga serpyllifolia var. G4/S2 ALB, CAR, Bridger-Teton NF Widespread/ Edge Low Uncommon Unknown Moderate Low chrysantha FRE, PAR, Medicine Bow NF [S. chrysantha, Hirculus SUB Shoshone NF serpyllifolius ssp. chrysanthus] Golden saxifrage Scheuchzeria palustris G5/S1 TET Targhee NF Disjunct Very Low Rare Unknown Moderate Medium Pod-grass Yellowstone NP Schoenoplectus heterochaetus G5/S1 CAM, Widespread/ Edge Very Low Unknown Unknown Moderate Low [Scirpus heterochaetus] CRO, SHE Slender bulrush Schoenoplectus saximontanus G5/S1 GOS Casper BLM? Widespread/ Edge Very Low Unknown Unknown Moderate Low [Scirpus saximontanus] Rocky Mountain bulrush 25 2012 Wyoming Plant Species of Concern List

Species Scientific Heritage Rank Federal Status County Managed Area Range Context # Occurs. Abundance Recent Intrinsic Wyoming Common Name Trends Vulnerability Contribution Rank Schoenoplectus subterminalis G4G5/S1 TET Yellowstone NP Disjunct Very Low Rare Stable? Moderate Medium [Scirpus subterminalis] Water bulrush Scirpus pendulus G5/S1 CON Widespread/ Edge Very Low Very Rare Stable Moderate Low Nodding leafy bulrush Scolochloa festucacea G5/S1 PAR Yellowstone NP Disjunct Very Low Rare Moderate Moderate Medium Sprangle-top Decline? Selaginella mutica G4G5/S1 CAR, LAR, Ashley NF (FGNRA) Widespread/ Edge Very Low Rare Stable? Moderate Low Blunt-leaf spike-moss SWE Medicine Bow NF Selaginella rupestris G5/S1 CRO, WES Black Hills NF Disjunct Very Low Rare Stable? Moderate Medium Ledge spike-moss Selaginella selaginoides G5/S1 USFS R2 PAR, SUB, Bridger-Teton NF Disjunct Very Low Rare Unknown Moderate Medium Low spike-moss Sensitive TET Pinedale BLM Targhee NF Yellowstone NP Selaginella underwoodii G5?/S1 ALB, LAR, Medicine Bow NF Widespread/ Edge Very Low Rare Unknown Moderate Low Underwood's spike-moss PLA Selaginella watsonii G4/S1 PAR Shoshone NF Widespread/ Edge Very Low Rare Stable? Moderate Low Watson's spike-moss Senecio hydrophiloides G4G5/S1 TET Grand Teton NP Widespread/ Edge Very Low Unknown Unknown Moderate Low [S. foetidus var. hydrophiloides] Sweet-marsh butterweed Senecio spartioides var. G5T4T5/S1 CAR, SWE Rawlins BLM Widespread/ Edge Very Low Rare Unknown Moderate Low multicapitatus Rock Springs BLM Many-headed broom groundsel Sesuvium verrucosum G5/S1? CAM Thunder Basin NG? Widespread/ Edge Very Low Rare Unknown Moderate Low Sea purslane Shoshonea pulvinata G2G3/S2 USFS R2 FRE, HOT, Cody BLM Regional Endemic/ Low Uncommon Stable? Moderate High Shoshonea Sensitive PAR, Wind Shoshone NF Core WY BLM River IR Worland BLM Sensitive Silene douglasii G4/S1 LIN Kemmerer BLM Widespread/ Edge Very Rare Unknown Moderate Low Douglas' campion Low Silene kingii G2G4Q/S2 FRE, HOT, Cody BLM Disjunct Low Rare Unknown Moderate Medium [Incl. undescribed variety] PAR Shoshone NF King's campion Silene repens [S. r. var. australe] G5/S1 SUB, TET Bridger-Teton NF Regional Endemic/ Very Low Rare Unknown Moderate Medium Creeping campion Edge Silphium integrifolium var. laeve G5 T4?/S1 LAR FE Warren AFB Disjunct Very Low Very Rare Moderate Moderate Medium Rosinweed Decline? Sisyrinchium idahoense var. G5T4/S1 TET Yellowstone NP Widespread/ Edge Very Low Rare Unknown Moderate Low idahoense Idaho blue-eyed grass Sparganium eurycarpum G5/S1 CRO, NIO, Black Hills NF Widespread/ Edge Very Low Unknown Unknown Moderate Low Large bur-reed SHE Sphaeromeria simplex G2/S2 WY BLM ALB, CAR, Casper BLM Rawlins Local Endemic/ Core Low Uncommon Stable Moderate Very High [Artemisia simplex] Sensitive CON, NAT BLM Laramie false sagebrush 26 2012 Wyoming Plant Species of Concern List

Species Scientific Heritage Rank Federal Status County Managed Area Range Context # Occurs. Abundance Recent Intrinsic Wyoming Common Name Trends Vulnerability Contribution Rank Spiranthes diluvialis G2G3/S1S2 USFWS CON, Casper BLM Sparse/ Core? Low Rare Moderate Moderate High Ute ladies' tresses Threaten. GOS, LAR, Decline? NIO Spirodela polyrrhiza G5/S1 CAR, TET Bridger-Teton NF Widespread/ Edge Very Low Unknown Unknown Moderate Low Common water-flaxseed Grand Teton NP Sporobolus heterolepis G5/S1 CRO, WES Widespread/ Edge Very Low Unknown Unknown Moderate Low Northern dropseed Stephanomeria fluminea G2/S2 PAR, SUB, Bridger-Teton NF Local Endemic/ Core Low Uncommon Unknown Moderate Very High Teton wire-lettuce TET Grand Teton NP Shoshone NF Stephanomeria pauciflora G5/S1 PLA Casper BLM Widespread/ Edge Very Low Unknown Unknown Moderate Low Prairie skeletonplant Symphyotrichum porteri G3G4/ S1 MBNF-SOLC ALB, LAR Medicine Bow NF Regional Endemic/ Very Low Rare Stable? Moderate Medium [Aster porteri] Edge Porter's aster Thelesperma caespitosum G2?/S1 USFS R4 SWE Ashley NF (FGNRA) Regional Endemic/ Very Low Uncommon Moderate Moderate Very High [T. pubescens var. caespitosum, T. Sensitive Rock Springs BLM Core Decline? subnudum var. caespitosum, incl. WY BLM in T. pubescens by some authors] Sensitive Green River greenthread Thelesperma pubescens G2/S1 USFS R4 SWE, UIN Rock Springs BLM Local Endemic/ Core Very Low Uncommon Stable? Moderate Very High Uinta greenthread Sensitive WY Wasatch-Cache NF BLM Sensitive

Tonestus pygmaeus G4/S1 ALB, CAR Medicine Bow NF Widespread/ Edge Very Low Rare Stable? Moderate Low [Haplopappus pygmaeus] Pygmy goldenweed Torreyochloa pallida var. G5T4Q/ S1 TET Grand Teton NP Disjunct Very Low Rare Unknown Unknown Medium fernaldii [Puccinellia fernaldii] Fernald alkali-grass Townsendia florifera G5/SH TET Bridger-Teton NF? Widespread/ Edge Very Low Unknown Unknown Moderate Unknown [T. florifer] Grand Teton NP? Showy Easter-daisy Townsendia microcephala G1/S1 WY BLM SWE, UIN Rock Springs BLM Local Endemic/ Core Very Low Rare Stable? Moderate Very High Cedar Mountain Easter-daisy Sensitive Tradescantia bracteata G5/S1 CRO Black Hills NF? Widespread/ Edge Very Low Unknown Unknown Moderate Low Long-bract spiderwort Trautvetteria caroliniensis G5/S1 TET Yellowstone NP Disjunct Very Low Rare Unknown Moderate Medium Carolina tassel-rue Trichophorum pumilum G5 /S1 MBTB-SOLC ALB, PAR, Bridger-Teton NF Disjunct Very Low Rare Stable? High Medium [Scirpus rollandii, S. pumilus] SUB, TET Medicine Bow NF Natl Pygmy bulrush Elk Refuge Pinedale BLM Shoshone NF Trifolium barnebyi G1/S1 WY BLM FRE Lander BLM Local Endemic/ Core Very Low Uncommon Stable? Moderate Very High [T. haydenii var. barnebyi] Sensitive Barneby's clover 27 2012 Wyoming Plant Species of Concern List

Species Scientific Heritage Rank Federal Status County Managed Area Range Context # Occurs. Abundance Recent Intrinsic Wyoming Common Name Trends Vulnerability Contribution Rank Trillium ovatum ssp. ovatum G5T5/S2 MBNF-SOLC CAR Medicine Bow NF Disjunct Low Rare Unknown Moderate Low Western trillium Rawlins BLM?

Triodanis holzingeri G4/S1 GOS, PLA Casper BLM? Widespread/ Edge Very Low Rare Unknown Moderate Low Holzinger Venus' looking-glass Triodanis leptocarpa G5?/S1 CAM, Bighorn NF? Widespread/ Edge Low Unknown Unknown Moderate Low Slim-pod Venus' looking-glass CRO, JOH, Black Hills NF SHE Trisetum canescens G5/S1 TET Yellowstone NP Widespread/ Edge Very Low Rare Unknown Moderate Low Tall trisetum Triteleia grandiflora G4G5/S2 USFS R2 ALB?, Bridger-Teton NF? Widespread/ Edge Low Rare Moderate Moderate Low [Brodiaea douglasii] Sensitive FRE, LIN, Grand Teton NP Decline? Large flower triteleia TET Medicine Bow NF? Shoshone NF? Targhee NF Yellowstone NP Utricularia intermedia G5/S1 TET Bridger-Teton NF Widespread/ Edge Very Low Rare Unknown Moderate Low Flat-leaf bladderwort Natl Elk Refuge Vaccinium myrtillus var. G5T4T5/S1 ALB, CAR, Medicine Bow NF Widespread/ Edge Very Low Rare Unknown Moderate Medium oreophilum TET Yellowstone NP? Dwarf bilberry Viburnum opulus var. americanum G5T5/S2 USFS R2 CRO Black Hills NF Widespread/ Edge Low Rare Unknown Moderate Low Highbush cranberry Sensitive Viola pedatifida G5/S1 CRO Black Hills NF Widespread/ Edge Very Low Rare Unknown Moderate Medium Prairie violet Devils Tower NM Viola renifolia var. brainerdii G5T5/S1 CRO, TET Black Hills NF Disjunct Very Low Unknown Unknown Moderate Low Kidney leaf white violet Bridger-Teton NF Grand Teton NP Targhee NF Xerophyllum tenax G5/S1 TET Grand Teton NP Widespread/ Edge Very Low Unknown Unknown Moderate Very High Western beargrass JDR Parkway Targhee NF Yellowstone NP Yermo xanthocephalus G1/S1 USFWS FRE Lander BLM Local Endemic/ Core Very Low Rare Stable? Desert yellowhead Threaten.

The 2012 Wyoming Plant Species of Concern list was prepared by Wyoming Natural Diversity Database (WYNDD) in a process that updated and analyzed current information on: Number of extant occurrences Range extent Intrinsic species’ vulnerability

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A rank calculator tool developed through NatureServe (Master et al. 2009, Faber-Langendoen et al. 2009) was used, scoring the factors above that are most consistent between all rare Wyoming plant species. An expanded description of the process is available on request. In the future, rigorous evaluation of threats will replace the intrinsic vulnerability factor, and other factors like abundance and trends will be incorporated. List placement is based on a combination of state rank and Wyoming contribution rank that can be viewed as a conservation concern matrix for determining which species remain on the species of concern list (SOC), potential species of concern list (PSOC), or are no longer tracked.

Conservation concern matrix for Wyoming plants WY Contrib Rank\ State Rank S1 S2 S3 Very High SOC SOC SOPC LISTS

High SOC SOC SOPC Species of Concern (SOC)

Medium SOC SOC - Species of Potential Concern (SOPC)

Low SOC - - Not Tracked/Other Agency Lists

The plant species on this list are not addressed by any state legislation but are routinely cited in policies and in development of sensitive species lists by federal land-managing agencies. Federal sensitive species list criteria are usually narrower and more geographically restricted than criteria for the Wyoming species of concern list. 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 1988, 1992, 2001) and in updates to the species of concern lists by Robert Lichvar, Hollis Marriott, Walter Fertig and Bonnie Heidel. The 700 species represent 25% of the current state flora, and most of the species that are no longer tracked were found to be more common than previously known. In turn, the continual compilation and periodic updating has funneled attention on the de facto rarest species.

Acknowledgements Much of the original data for this report comes from specimens deposited at the Rocky Mountain Herbarium. Additional information and suggestions were provided over time by David Anderson, Larry Apple, Melanie Arnett, Darcie Bacon, Frank Blomquist, Bernie Bornong, Janet Britt, Greg Brown, Sabine Mellmann-Brown, Beth Burkhart, Jeff Carroll, Susan Corey, Reed Crook, Jean Daly, Charmaine Delmatier, Robert and Jane Dorn, Katy Duffy, Brian Elliott, Erwin Evert, Donald Farrar, Walt Fertig, Erin Foley, Ben Franklin, Jim Glennon, Wendy Haas, Joy Handley, Ron Hartman, Katie Haynes, Don Hazlett, Pat and Noel Holmgren, Kent Houston, Kelly Hughes, Ann Humphrey, George Jones, Marcel Jouseau, Greg Karow, John Kartesz, Dave Scott Kesonie, Andrew King, Lynn Kinter, Grace Kostel, Andy Kratz, Clay Kyte, Jill Larson, Steve Laster, Ben Legler, Claire Leon, Michael Mancuso, Stuart Markow, Hollis Marriott, Rob Massatti, Jerry Mastel, Daryl Mergen, Cheryl Mayer, Bob Moseley, Mary Neighbours, B. Ernie Nelson, Dave Ode, Kevin O’Dea, Jim Ozenberger, Barb Packer, Adrienne Pilmanis, Teresa Prendusi, John Proctor, Deanna Reyher, Kathy Roche, Richard and Bev Scott, Phil Shephard, Carolyn Sieg, Susan Spackman, Mathew Spann, Gerry Steinauer, Emma Stewart, Amy and Kevin Taylor, Klara Varga, Chelsea Vollmer, Laura Welp, Jennifer Whipple, and Kathy Zacharkevics.

References Dorn, R.D. 1977. Manual of the Vascular Plants of Wyoming. Two volumes. Garland Publishing, Inc. New York, NY. Dorn, R.D. 1988. Vascular Plants of Wyoming. Mountain West Publishing. Cheyenne, WY. 29 2012 Wyoming Plant Species of Concern List

Dorn, R.D. 1992, 2nd ed. Vascular Plants of Wyoming. Mountain West Publishing. Cheyenne, WY. Dorn, R.D. 2001, 3rd ed. Vascular Plants of Wyoming. Mountain West Publishing. Cheyenne, WY. Faber-Langendoen, D., L. Master, J. Nichols, K. Snow, A. Tomaino, R. Bittmann, G. Hammerson, B. Heidel, L. Ramsay and B. Young. 2009. NatureServe conservation status assessments: methodology for assigning ranks. NatureServe, Arlington, VA. Posted electronically at: http://www.natureserve.org/publications/library.jsp#nspubs. Master, L., D. Faber-Langendoen, R. Bittmann, G.A. Hammerson, B. Heidel, J. Nichols, L. Ramsay, and A. Tomaino. 2009. NatureServe conservation status assessments: factors for assessing extinction risk. NatureServe, Arlington, VA. Posted electronically at: http://www.natureserve.org/publications/library.jsp#nspubs. USDA Forest Service. 1994. Threatened, Endangered and Sensitive species of the Intermountain Region. USDA Forest Service, Region 4, Ogden, UT. USDA Forest Service. 2011. Region 2 Regional Forester’s Sensitive Species: information memorandum 3 November 2003, as amended in 2004. USDI Bureau of Land Management. 2010. Wyoming Bureau of Land Management sensitive species policy and list: instruction memorandum no. WY02001-040. BLM Wyoming State Office, Cheyenne.

This document, supporting information, and staff contact information are available at: www.uwyo.edu/wyndd/. Please contact WYNDD to convey comments or check for any status revisions: Wyoming Natural Diversity Database, Dept. 3381, 1000 E. University Avenue, Laramie, WY 82071.

The citation for this list is: Heidel, B. 2012. Wyoming plant species of concern, April 2012. Wyoming Natural Diversity Database, Laramie, WY.

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