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Pinus ponderosa / Purshia tridentata / Pseudoroegneria spicata Woodland | Western Ecology Working Group of...
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Name: Pinus ponderosa / Purshia tridentata / Pseudoroegneria spicata Woodland
Reference: Western Ecology Working Group of...
Description: This woodland occurs in the eastern Cascades of Oregon and Washington, the Blue Mountains in eastern Oregon and adjacent Idaho, and California's Modoc Plateau. It has been described as a phase in Idaho and Montana and may be present there. Elevations vary between 1500 and 5400 feet on all aspects and slopes of 0-40%. Soils are gravelly loamy sand to fine sandy loam. Blue Mountains sites tend to be steep while Modoc occurrences are on relatively level lava tube benches on rolling basalt plateaus. Pinus ponderosa is the only tree and covers 5-47% over Purshia tridentata (1-21% cover). Pseudoroegneria spicata and Festuca idahoensis cover 1-20%. The former is more abundant on steep and stony sites. The later is absent from California stands. Species of lesser importance include Achillea millefolium, Lomatium triternatum, and Lathyrus nevadensis. Fires have historically maintained Pinus ponderosa while thinning Purshia tridentata and Juniperus occidentalis. Overgrazed and other disturbed sites have high amounts of Bromus tectorum. 
Accession Code: VB.CC.20950.PINUSPONDEROSAP
Plot-observations of this Community Concept: 0
      Party Perspective according to: NatureServe (organization)
Perspective from: 26-Nov-1997 to: 17-Nov-2014
      Names:   Translated: Ponderosa Pine / Bitterbrush / Bluebunch Wheatgrass Woodland
  UID: ELEMENT_GLOBAL.2.685909 NatureServe ExplorerNatureServe Explorer logo
  Code: CEGL000197
  Scientific: Pinus ponderosa / Purshia tridentata / Pseudoroegneria spicata Woodland
(convergence) and Synonyms:
(undetermined) Pinus ponderosa / Purshia tridentata / Pseudoroegneria spicata Woodland