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Purshia tridentata / Hesperostipa comata Shrub Grassland | NatureServe Biotics 2019
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Name: Purshia tridentata / Hesperostipa comata Shrub Grassland Reference: NatureServe Biotics 2019 Description: This plant association is known from the Intermountain West, from western Idaho, eastern Washington, Oregon, and southern Utah. The association occurs on gently sloped sand to well-drained silty clay loams located from 152 to 2649 m (500-8691 feet) elevation. Dispersed <i>Purshia tridentata</i> forms an open shrub canopy (with an average 20% canopy cover) over an herbaceous layer dominated by <i>Hesperostipa comata</i> (averaging &gt;50% cover). <i>Ericameria nauseosa</i> and <i>Chrysothamnus viscidiflorus</i> are occasionally present and increase in cover with disturbance. <i>Poa secunda</i> is usually also present in the understory and occurs with 20-50% cover. Additional bunchgrasses, <i>Poa secunda</i> and <i>Poa fendleriana</i>, also may occur in the graminoid layer, with 20-50% cover. Other abundant perennial grasses may include <i>Achnatherum hymenoides, Koeleria macrantha</i>, and <i>Elymus lanceolatus</i>. The perennial forb layer may include <i>Lithophragma glabrum, Linanthus pungens, Chenopodium atrovirens, Chenopodium leptophyllum</i>, and <i>Potentilla crinita</i>. A cryptogamic layer is well-developed in the most undisturbed stands.  Accession Code: urn:lsid:vegbank.org:commConcept:30407-{44C7C360-A8BB-48F7-988E-0A303B1DAE56} Plot-observations of this Community Concept: 0
	Party Perspective according to: NatureServe (organization) Perspective from: 03-Jun-2008 to: ongoing
	status: accepted Community's Parent: Purshia tridentata - Artemisia tridentata Mesic Steppe & Shrubland Alliance This Community's Level: Association This Community's Children: [none]		Names:   UID: ELEMENT_GLOBAL.2.687416 NatureServe Explorer   Code: CEGL001498   Translated: Antelope Bitterbrush / Needle-and-Thread Shrub Grassland   Scientific: Purshia tridentata / Hesperostipa comata Shrub Grassland (convergence) and Synonyms: (similar) Purshia tridentata / Hesperostipa comata Shrub Herbaceous Vegetation (similar) CEGL001498 (similar) Purshia tridentata / Hesperostipa comata Shrub Herbaceous Vegetation