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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°N 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 (&gt;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 bunchgrasses. Shrub cover, contributed almost wholly by <i>Purshia tridentata</i>, 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. <i>Pseudoroegneria spicata</i> and <i>Festuca idahoensis</i> are the dominant graminoids. <i>Festuca campestris</i> is also well represented and diagnostic for the type, indicative of the favorable moisture conditions which set this type apart from ~<i>Purshia tridentata / Pseudoroegneria spicata</i> Shrub Herbaceous Vegetation (CEGL001495)$$ and ~<i>Purshia tridentata / Festuca idahoensis</i> Shrub Herbaceous Vegetation (CEGL002674)$$, which typically occur on drier sites (or outside the geographic range of <i>Festuca campestris</i>). The forb component is dominated by <i>Balsamorhiza sagittata</i>. <i>Achillea millefolium, Collinsia parviflora, Lithospermum ruderale</i> and <i>Lomatium triternatum</i> are regularly present with lesser canopy cover.  Accession Code: VB.CC.32804.CEGL001494 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.2.684484 NatureServe Explorer   Translated: Antelope Bitterbrush / Rough Fescue Shrub Herbaceous Vegetation   Scientific: Purshia tridentata / Festuca campestris Shrub Herbaceous Vegetation   Code: CEGL001494