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Purshia tridentata / Festuca campestris Shrub Herbaceous Vegetation | Western Ecology Working Group of...
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Name: Purshia tridentata / Festuca campestris Shrub Herbaceous Vegetation Reference: Western Ecology Working Group of... Description: This association has been documented from Montana west of the Continental Divide and north of 47 degrees latitude; it has not been described from adjacent states or Canadian provinces. Stands occur in the 30-50 cm precipitation zone at elevations ranging 915-1525 m (3000-5000 feet), on confined granitic substrates with steep (>35%), south- through east-facing slopes. This type occurs primarily as small patches to approaching large patch status, the dominant aspect of which is robust bunch grasses. Shrub cover, contributed almost wholly by Purshia tridentata, generally does not exceed 20% and may be considerably less (approaching 5%) where browsing pressure from both domestic stock and wild ungulates has been intensive. Pseudoroegneria spicata and Festuca idahoensis are the dominant graminoids. Festuca campestris is also well represented and diagnostic for the type, indicative of the favorable moisture conditions which set this type apart from Purshia tridentata / Pseudoroegneria spicata Shrub Herbaceous Vegetation (CEGL001495) and Purshia tridentata / Festuca idahoensis Shrub Herbaceous Vegetation (CEGL002674), which typically occur on drier sites (or outside the geographic range of Festuca campestris). The forb component is dominated by Balsamorhiza sagittata. Achillea millefolium, Collinsia parviflora, Lithospermum ruderale and Lomatium triternatum are regularly present with lesser canopy cover.  Accession Code: VB.CC.19862.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 / Prairie Fescue Shrub Herbaceous Vegetation   UID: ELEMENT_GLOBAL.2.684484 NatureServe Explorer   Code: CEGL001494   Scientific: Purshia tridentata / Festuca campestris Shrub Herbaceous Vegetation (convergence) and Synonyms: (undetermined) Purshia tridentata / Festuca campestris Shrub Herbaceous Vegetation