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State Estimated Number of Element Occurrences 92/04/09

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State Estimated Number of Element Occurrences 92/04/09 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 plus peer reviews. The methods and background are presented at the end of the list. Codes and definitions are posted on-line. These lists follow the taxonomic treatments in Dorn (2001). Species Scientific Heritage Rank Federal County Managed Area Range Context # Occurs. Abundance Recent Intrinsic Wyoming Common Name Status Trends Vulnerability Contribution Rank Abies concolor G5/S1 SWE, UIN Rock Springs BLM Widespread/ Edge Very Low Rare Stable? Very Low Moderate White fir Wasatch-Cache NF Abronia ammophila G1/S1 PAR Yellowstone NP Local Endemic/ Core Very Low Rare Stable? High Very High Yellowstone sand verbena Achnatherum nevadense G4/S1 CAR, FRE, Bridger-Teton NF Disjunct Very Low Rare Unknown Moderate Medium [Stipa nevadensis] PAR?, TET Lander BLM Nevada needlegrass 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- WAS Medicine Bow NF? SOLC Shoshone NF Yellowstone NP Agrostis mertensii G5/S2 ALB, FRE, Grand Teton NP Disjunct Low Unknown Stable? Moderate Medium [A. borealis] PAR, TET Medicine Bow 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 1 2012 Wyoming Plant Species of Concern List Species Scientific Heritage Rank Federal County Managed Area Range Context # Occurs. Abundance Recent Intrinsic Wyoming Common Name Status Trends Vulnerability Contribution Rank Agrostis rossiae G1/S1 TET Yellowstone NP Local Endemic/ Core Very Low Rare Stable High Very High Ross bentgrass Aletes humilis G2G3/SH? MBNF- ALB? Regional Endemic/ Very Low Unknown Unknown Unknown Unknown Larimer aletes SOLC 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 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. zephyra G5T4/S1 BIG, JOH, Bighorn NF Regional Endemic/ Very Low Uncommon Stable Moderate Medium Zephyr windflower SHE Edge Antennaria arcuata G2/S2 USFS R4 FRE, SUB Lander BLM Regional Endemic/ Moderate Uncommon Stable Moderate Very High Meadow pussytoes Sensitive Pinedale BLM Core WY BLM Rock Springs BLM Sensitive Antennaria flagellaris G5?/S2 PAR, TET Shoshone NF Disjunct Low Unknown Stable Low Medium Stoloniferous pussytoes Yellowstone NP Antennaria monocephala G4G5TNR/S2 BGHRN FRE, JOH, Bighorn NF Widespread/ Edge Low Rare Stable Moderate Low [A. m. ssp. angustata] NF-SOLC PAR, SUB, Bridger-Teton NF Single-head pussytoes TET Shoshone NF Targhee NF Aquilegia brevistyla G5/S1 CRO, PAR?, Black Hills NF Disjunct Very Low Unknown Stable? Low Medium Small-flower columbine WES Newcastle BLM Shoshone NF? Aquilegia formosa G5T5/S1 PAR, TET Grand Teton NP Widespread/ Edge Very Low Unknown Unknown Moderate Low [A. f. var. formosa] JDR Parkway Crimson columbine 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 Low 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 County Managed Area Range Context # Occurs. Abundance Recent Intrinsic Wyoming Common Name Status 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?, WES Widespread/ Edge Very Low Rare Unknown Moderate Low [A. basiramea var. curtissii] 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, FRE?, Lander BLM Widespread/ Edge Low? Unknown Unknown Moderate Low haydenianus LIN?, SWE, Kemmerer BLM Hayden's milkvetch UIN Rawlins BLM Rock Springs BLM 3 2012 Wyoming Plant Species of Concern List Species Scientific Heritage Rank Federal County Managed Area Range Context # Occurs. Abundance Recent Intrinsic Wyoming Common Name Status 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?, FRE, Lander BLM Local Endemic/ Core Low Uncommon Stable Moderate Very High purpureus Sensitive WAS, Wind Shoshone NF [Orophaca triphylla var. purpurea] River IR Worland BLM? 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. salinus G5T5/S1 LIN, UIN Fossil Butte NM Widespread/ Edge Very Low Unknown Unknown Low Low Sodaville milkvetch Kemmerer BLM Astragalus leptaleus G4/SH USFS R2 CAR Medicine Bow NF Regional Endemic/ Very Low Unknown Unknown Unknown Unknown Park milkvetch Sensitive Edge Trgh 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
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