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Purshia tridentata / Carex pensylvanica - Achnatherum occidentale Shrub Herbaceous Vegetation | Western Ecology Working Group of...
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Name: Purshia tridentata / Carex pensylvanica - Achnatherum occidentale Shrub Herbaceous Vegetation
Reference: Western Ecology Working Group of...
Description: This rare shrubland was described from 5 good condition plots on flat, stream terraces, floodplains and dry drainages along the eastern side of the Cascades in southern Oregon. Elevations are between 1340 and 1650 m. All known sites are from the Winema National Forest, and much of the habitat has been damaged by overuse by cattle. The soils are deep, alluvial sands deposited over Mazama ash and pumice. <i>Purshia tridentata</i> is the dominant shrub, always present between 5 and 20% cover. In poor condition stands <i>Ericameria bloomeri (= Haplopappus bloomeri)</i> or <i>Ericameria nauseosa (= Chrysothamnus nauseosus)</i> are more important. <i>Achnatherum occidentale (= Stipa occidentalis)</i> and <i>Carex pensylvanica</i> are codominant on good condition stands, although with grazing <i>Elymus elymoides</i> increases. Other forbs include <i>Packera cana (= Senecio canus), Eriogonum umbellatum, Phacelia hastata</i>, and <i>Cistanthe umbellata (= Spraguea umbellata)</i>. This type is easily distinguished by the dominants, and its occurrence on alluvial sands on pumice. 
Accession Code: VB.CC.32751.CEGL001492
Plot-observations of this Community Concept: 0
      Party Perspective according to: NatureServe (organization)
Perspective from: 17-Nov-2014 to: 01-May-2019
     
  • status: accepted
  • This Community's Level: association
  • This Community's Children: [none]
Names:   UID: ELEMENT_GLOBAL.2.689807 NatureServe ExplorerNatureServe Explorer logo
  Translated: Antelope Bitterbrush / Pennsylvania Sedge - Western Needlegrass Shrub Herbaceous Vegetation
  Scientific: Purshia tridentata / Carex pensylvanica - Achnatherum occidentale Shrub Herbaceous Vegetation
  Code: CEGL001492