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Purshia stansburiana Shrubland | NatureServe Biotics 2019
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Name: Purshia stansburiana Shrubland
Reference: NatureServe Biotics 2019
Description: This cliffrose shrubland association occurs in northern Arizona, southeastern California and Utah. It 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: urn:lsid:vegbank.org:commConcept:31859-{D8D1CEB3-1629-4FEA-ADEE-37D26DF200E7}
Plot-observations of this Community Concept: 0
      Party Perspective according to: NatureServe (organization)
Perspective from: 06-Jan-2017 to: ongoing
      Names:   UID: ELEMENT_GLOBAL.2.683075 NatureServe ExplorerNatureServe Explorer logo
  Code: CEGL002957
  Translated: Stansbury's Cliffrose Shrubland
  Scientific: Purshia stansburiana Shrubland
(convergence) and Synonyms:
(similar) Purshia stansburiana Shrubland
(similar) CEGL002957