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Purshia tridentata / Hesperostipa comata Shrub Herbaceous Vegetation | Western Ecology Working Group of...
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Name: Purshia tridentata / Hesperostipa comata Shrub Herbaceous Vegetation
Reference: Western Ecology Working Group of...
Description: This plant association is described for the Columbia Basin and Owyhee Uplands ecoregional sections of western Idaho, and eastern Washington and Oregon. The association is restricted to gently sloped sand deposits located at 500-1300 feet elevation. Dispersed Purshia tridentata forms an open shrub canopy (with an average 20% canopy cover) over an herbaceous layer dominated by Hesperostipa comata (= Stipa comata) (averaging >50% cover). Ericameria nauseosa (= Chrysothamnus nauseosus) and Chrysothamnus viscidiflorus are occasionally present, and increase in cover with disturbance. Poa secunda is usually also present in the understory and occurs with 20-50% cover. Other locally abundant perennial grasses include Achnatherum hymenoides (= Oryzopsis hymenoides) and Koeleria macrantha (= Koeleria cristata). Common forbs include Lithophragma glabrum (= Lithophragma bulbiferum), Achillea millefolium, Antennaria dimorpha and Astragalus purshii. A cryptogamic layer is well-developed in the most undisturbed stands. 
Accession Code: VB.CC.24336.PURSHIATRIDENTA
Plot-observations of this Community Concept: 0
      Party Perspective according to: NatureServe (organization)
Perspective from: 26-Nov-1997 to: 17-Nov-2014
      Names:   Translated: Bitterbrush / Needle-and-Thread Shrub Herbaceous Vegetation
  UID: ELEMENT_GLOBAL.2.687416 NatureServe ExplorerNatureServe Explorer logo
  Code: CEGL001498
  Scientific: Purshia tridentata / Hesperostipa comata Shrub Herbaceous Vegetation
  Common: Antelope Bitterbrush / Needle-and-Thread
(convergence) and Synonyms:
(undetermined) Purshia tridentata / Hesperostipa comata Shrub Herbaceous Vegetation