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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. Purshia tridentata is the dominant shrub, always present between 5 and 20% cover. In poor condition stands Ericameria bloomeri (= Haplopappus bloomeri) or Ericameria nauseosa (= Chrysothamnus nauseosus) are more important. Achnatherum occidentale (= Stipa occidentalis) and Carex pensylvanica are codominant on good condition stands, although with grazing Elymus elymoides increases. Other forbs include Packera cana (= Senecio canus), Eriogonum umbellatum, Phacelia hastata, and Cistanthe umbellata (= Spraguea umbellata). This type is easily distinguished by the dominants, and its occurrence on alluvial sands on pumice.  Accession Code: VB.CC.27514.PURSHIATRIDENTA Plot-observations of this Community Concept: 0
	Party Perspective according to: NatureServe (organization) Perspective from: 26-Nov-1997 to: 17-Nov-2014
	status: accepted Community's Parent: Purshia tridentata Shrub Herbaceous Alliance This Community's Level: Association This Community's Children: [none]		Names:   Translated: Bitterbrush / Pennsylvania Sedge - Western Needlegrass Shrub Herbaceous Vegetation   UID: ELEMENT_GLOBAL.2.689807 NatureServe Explorer   Code: CEGL001492   Scientific: Purshia tridentata / Carex pensylvanica - Achnatherum occidentale Shrub Herbaceous Vegetation (convergence) and Synonyms: (undetermined) Purshia tridentata / Carex pensylvanica - Achnatherum occidentale Shrub Herbaceous Vegetation