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Ribes cereum / Leymus ambiguus Shrubland | Western Ecology Working Group of...
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Name: Ribes cereum / Leymus ambiguus Shrubland Reference: Western Ecology Working Group of... Description: This association has been described from the eastern slopes of the northern Front Range in Colorado. This association is characterized by a variable number of woody species, but only the broad-leaved, deciduous shrub Ribes cereum exhibits a high degree of constancy and canopy cover (100% and 2-15%, respectively). Other woody species can include very scattered needle-leaved, evergreen trees, such as Juniperus scopulorum, Pinus ponderosa and Pseudotsuga menziesii. Other shrubs occasionally present in small amounts include Ericameria nauseosa (= Chrysothamnus nauseosus), Jamesia americana, Rhus trilobata, and Rubus deliciosus. Pseudotsuga menziesii occurs primarily on relatively mesic north-facing canyon walls, while Rhus trilobata is more abundant on steep talus slopes. The perennial bunchgrass Leymus ambiguus is the most abundant species in this association, having 12-18% cover. Only a small number of other herbaceous species are present, including Bouteloua gracilis and Achnatherum scribneri (= Stipa scribneri) among the grasses, and Artemisia ludoviciana, Cryptantha virgata, Heterotheca villosa, Eriogonum umbellatum, and Phacelia heterophylla among the perennial forbs. Total herbaceous cover averages <25% and diversity is relatively low. Sites where this type is found are steep canyon walls and talus slopes of all aspects in the eastern foothills, from 5800-7220 feet elevation. Slopes are near vertical (70-90% slope) and are composed primarily of massive to fragmented bedrock features or colluvium. Parent materials are residual to colluvial granite, gneiss or schist, which have developed into a very thin soil mantle. Soils are Entisols, with sandy loam to loamy sand textures, and thin A horizons over extremely rocky C horizons.  Accession Code: VB.CC.22332.RIBESCEREUMLEYM 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: Ribes cereum Shrubland Alliance This Community's Level: Association This Community's Children: [none]		Names:   Translated: White Squaw Currant / Rocky Mountain Lyme Grass Shrubland   UID: ELEMENT_GLOBAL.2.686509 NatureServe Explorer   Code: CEGL001124   Scientific: Ribes cereum / Leymus ambiguus Shrubland   Common: Wax Currant / Rocky Mountain Lyme Grass (convergence) and Synonyms: (undetermined) Ribes cereum / Leymus ambiguus Shrubland