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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 460 and 1650 m (1500-5400 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. <i>Pinus ponderosa</i> is the only tree and covers 5-47% over <i>Purshia tridentata</i> (1-21% cover). <i>Pseudoroegneria spicata</i> and <i>Festuca idahoensis</i> 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 <i>Achillea millefolium, Lomatium triternatum</i>, and <i>Lathyrus nevadensis</i>. Fires have historically maintained <i>Pinus ponderosa</i> while thinning <i>Purshia tridentata</i> and <i>Juniperus occidentalis</i>. Overgrazed and other disturbed sites have high amounts of <i>Bromus tectorum</i>. 
Accession Code: VB.CC.33185.CEGL000197
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.2.685909 NatureServe ExplorerNatureServe Explorer logo
  Translated: Ponderosa Pine / Antelope Bitterbrush / Bluebunch Wheatgrass Woodland
  Scientific: Pinus ponderosa / Purshia tridentata / Pseudoroegneria spicata Woodland
  Code: CEGL000197