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Jamesia americana Shrubland Alliance | Western Ecology Working Group of...
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Name: Jamesia americana Shrubland Alliance Reference: Western Ecology Working Group of... Description: Stands of this rock outcrop shrubland are found in central Colorado in the vicinity of the Pike-San Isabel National Forest, occupying outcrops of varying size. Many of these sites are small, but the best examples grow from very large cliff faces on the upper shoulders of large hills. The slopes are steep (30-60%) and a few appear vertical. The aspect is predominantly southerly, but a few western exposures occur (150-270 degrees). The exposures are large granite boulders that have sometimes weathered and cracked. The common shrubs grow within the cracks on the rocks and around the base of the rocks where accumulations of small gravel and soil occur. This shrubland is relatively sparse because of the large boulders that are strewn on the landscape or appear as outcropping bedrock. Often, the lichens covering these rocks provide large amounts of cover, at times from 30-60%. Typically, the dominant shrubs are from 1-2 m in height and have cover ranging from 10-25% across the rock outcrops. Jamesia americana, Rubus deliciosus, and Ribes cereum shrubs are always present, and lesser amounts of Prunus virginiana, Cercocarpus montanus, and Dasiphora fruticosa are sometimes observed. Common graminoids associated with these dry exposures include Muhlenbergia montana and Bouteloua gracilis, which have low cover, from 5-10% on most outcrops. Jamesia americana shrubs often grow at the base of some boulders and drape around the sides much like a curtain, resulting in only a minor foliar cover value for the shrub.  Accession Code: VB.CC.20327.JAMESIAAMERICAN Plot-observations of this Community Concept: 0
	Party Perspective according to: NatureServe (organization) Perspective from: 27-Aug-2002 to: 01-May-2019
	status: accepted This Community's Level: Alliance This Community's Children: [none]		Names:   Scientific: Jamesia americana Shrubland Alliance   Translated: Waxflower Shrubland Alliance   UID: HIGHER_CLASS_UNIT.2.124528 NatureServe Explorer   Code: A.2566