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Pinus ponderosa / Purshia tridentata / Pseudoroegneria spicata Woodland | NatureServe Biotics 2019
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Name: Pinus ponderosa / Purshia tridentata / Pseudoroegneria spicata Woodland Reference: NatureServe Biotics 2019 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: urn:lsid:vegbank.org:commConcept:29106-{5E0B4DF7-BC4D-4691-8FD6-0B813B70525F} Plot-observations of this Community Concept: 1
	Party Perspective according to: NatureServe (organization) Perspective from: 26-Nov-1997 to: ongoing
	status: accepted Community's Parent: Pinus ponderosa / Shrub Understory Central Rocky Mountain Woodland Alliance This Community's Level: Association This Community's Children: [none]		Names:   UID: ELEMENT_GLOBAL.2.685909 NatureServe Explorer   Code: CEGL000197   Translated: Ponderosa Pine / Antelope Bitterbrush / Bluebunch Wheatgrass Woodland   Scientific: Pinus ponderosa / Purshia tridentata / Pseudoroegneria spicata Woodland (convergence) and Synonyms: (similar) Pinus ponderosa / Purshia tridentata / Pseudoroegneria spicata Woodland (similar) CEGL000197 (similar) Pinus ponderosa / Purshia tridentata / Pseudoroegneria spicata Woodland