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Purshia tridentata / Artemisia frigida / Hesperostipa comata Shrubland | Western Ecology Working Group of...
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Name: Purshia tridentata / Artemisia frigida / Hesperostipa comata Shrubland Reference: Western Ecology Working Group of... Description: Has been described from north-central Colorado, along the eastern slopes of the northern Front Range, on the Roosevelt National Forest. Best developed examples are in the Cache La Poudre River drainage in the northern Roosevelt National Forest, in a narrowly restricted latitudinal range. The broad-leaved, semi-evergreen shrub, Purshia tridentata, averages 30% cover in this shrubland association, with heights of 1-2 m. Other shrubs are poorly represented, but the low Artemisia frigida is present in all stands, averaging 4% cover. The herbaceous layer is relatively sparse and dominated by the 0.5 m tall perennial bunchgrass Hesperostipa comata (= Stipa comata), with 15% cover. Other important species present in small amounts include the perennial grasses Bouteloua gracilis and Elymus albicans (= Elymus lanceolatus ssp. albicans), and the perennial forbs Heterotheca villosa, Eriogonum umbellatum, Helianthus pumilus, and Scutellaria brittonii. Sites where this association is found are steep to very steep (30-55%) mountain slopes with southerly aspects on the eastern slopes of the Front Range, from 5800-7700 feet elevation. These sites are typically too xeric to support coniferous forest. Parent materials are colluvium of schist and gneiss origins which have developed into soils classified as Entisols. These soils are poorly developed, coarse-textured and rocky, with loamy and sandy textures. There is typically a shallow A horizons over a cambic B horizon over rocky C horizons. The soil surface is also moderately rocky.  Accession Code: VB.CC.24444.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 Shrubland Alliance This Community's Level: Association This Community's Children: [none]		Names:   Translated: Bitterbrush / Fringed Sagebrush / Needle-and-Thread Shrubland   UID: ELEMENT_GLOBAL.2.687443 NatureServe Explorer   Code: CEGL001055   Scientific: Purshia tridentata / Artemisia frigida / Hesperostipa comata Shrubland   Common: Antelope Bitterbrush - Fringed Sagebrush / Needle-and-Thread (convergence) and Synonyms: (undetermined) Purshia tridentata / Artemisia frigida / Hesperostipa comata Shrubland