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Pinus contorta var. latifolia / Purshia tridentata / Achnatherum occidentale ssp. occidentale Woodland | Western Ecology Working Group of...
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Name: Pinus contorta var. latifolia / Purshia tridentata / Achnatherum occidentale ssp. occidentale Woodland Reference: Western Ecology Working Group of... Description: This association is found along the eastern flanks of the Cascade Range of central Oregon. It occurs at moderate elevations between 1280-1890 m (4200-6200 feet) with low-gradient slopes (0-15%) of all aspects. Soils are usually well-drained mixtures of sand and loam, generally on deep pumice. Pinus contorta var. latifolia is the predominant overstory tree (10-50% cover) with occasional Pinus ponderosa up to 7% cover. Purshia tridentata typically dominates the shrub layer (5-45% cover) with occasional Ribes cereum var. cereum (0-5% cover). The herb layer consists of Achnatherum occidentale (= Stipa occidentalis) with less than 5% cover and lesser amounts of Penstemon cinicola, Lupinus caudatus, Fragaria virginiana, Carex rossii, and Eriogonum umbellatum. The climax tree species are Pinus contorta var. latifolia and Pinus ponderosa, which respond well to periodic natural disturbance. This association is similar to Pinus contorta var. latifolia / Purshia tridentata / Festuca idahoensis Woodland (CEGL000160) but has a more depauperate understory and lack of Festuca idahoensis.  Accession Code: VB.CC.23110.PINUSCONTORTAVA 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: Pinus contorta Woodland Alliance This Community's Level: Association This Community's Children: [none]		Names:   Translated: Lodgepole Pine / Bitterbrush / Western Needlegrass Woodland   UID: ELEMENT_GLOBAL.2.686618 NatureServe Explorer   Code: CEGL000162   Scientific: Pinus contorta var. latifolia / Purshia tridentata / Achnatherum occidentale ssp. occidentale Woodland (convergence) and Synonyms: (undetermined) Pinus contorta var. latifolia / Purshia tridentata / Achnatherum occidentale ssp. occidentale Woodland