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Purshia stansburiana Shrubland | Western Ecology Working Group of...
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Name: Purshia stansburiana Shrubland Reference: Western Ecology Working Group of... Description: This cliffrose shrubland association is currently described from Grand Canyon National Park and Grand Canyon-Parashant National Monument in Arizona. More survey and classification work are needed to fully characterize this type. It occurs near the edge of canyon rims, and often occurs adjacent to pinyon-juniper or ponderosa pine woodlands. It typically occurs at 1800 to 2000 m (5950-6775 feet) elevation, but can be found as high as 2425 m (7975 feet). This association favors xeric south- or west-facing exposures on the high-level plateau or upper sideslopes below the rim. It typically occurs on flat ground (1-4°), but can be found on steeper gradients (18°) when occurring on sideslopes. Limestone is a common parent material, and exposed bedrock occurs in most stands. Trees are usually absent; however, scattered <i>Pinus edulis</i> or <i>Juniperus osteosperma</i> may sporadically occur in some stands. The shrub <i>Purshia stansburiana</i> dominates and characterizes this association, while other components of the shrub and understory strata often vary. The short shrubs <i>Ephedra viridis</i> and <i>Artemisia tridentata</i> are common. Dwarf-shrub cover and composition are somewhat variable; <i>Gutierrezia sarothrae</i> occurs in most stands, while various <i>Opuntia</i> species are also common. The graminoid understory is typically well-developed; however, stands lacking a graminoid understory are not uncommon. Either <i>Poa fendleriana</i> or <i>Bouteloua gracilis</i> usually dominates this layer, while various other native bunchgrasses, such as <i>Elymus elymoides, Sporobolus cryptandrus, Hesperostipa comata, Bouteloua curtipendula</i>, and <i>Aristida arizonica</i>, can occur. The exotic <i>Bromus tectorum</i> is commonly present. Forbs are typically well-represented, although again, composition varies among stands. <i>Sanvitalia abertii</i> and <i>Artemisia ludoviciana</i> commonly occur.  Accession Code: VB.CC.31648.CEGL002957 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.2.683075 NatureServe Explorer   Translated: Stansbury's Cliffrose Shrubland   Scientific: Purshia stansburiana Shrubland   Code: CEGL002957