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Gutierrezia sarothrae / Pleuraphis rigida Shrub Herbaceous Vegetation | Western Ecology Working Group of...
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Name: Gutierrezia sarothrae / Pleuraphis rigida Shrub Herbaceous Vegetation Reference: Western Ecology Working Group of... Description: This association reportedly occurs extensively in Grand Canyon National Park in northwestern Arizona from 1160-1430 m elevation. It is found on flat to gently rolling sites of all aspects in Toroweep Valley and Tuckup Canyon. The substrate is derived from basalt lava flows or consolidated alluvium, and the soils are shallow and cobbly. This association is dominated by graminoids with sparse sclerophyllous evergreen and deciduous shrubs and dwarf-shrubs, all less than 1 m in height. Total vegetation canopy cover is less than 50%. The graminoid layer is a mixture of perennial and annual grasses codominated by the native perennial grass Pleuraphis rigida (= Hilaria rigida) and the annual exotic grass Bromus tectorum. Other characteristic grasses include Achnatherum hymenoides (= Oryzopsis hymenoides) and species of Aristida, Bouteloua, Muhlenbergia and Stipa. The dwarf-shrub, Gutierrezia sarothrae, dominates the woody layer. Other characteristic shrubs and dwarf-shrubs include Atriplex canescens, Lycium pallidum, Krascheninnikovia lanata and Ephedra viridis. Succulents may include the cacti, Opuntia whipplei, Opuntia phaeacantha, Opuntia erinacea, Coryphantha spp. and the rosette, Yucca baccata. Other common annual forbs are Plantago ovata (= Plantago insularis), Eriogonum inflatum, Cleome lutea, and the exotic Salsola kali.  Accession Code: VB.CC.26980.GUTIERREZIASARO 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: Pleuraphis rigida / Gutierrezia sarothrae Shrub Herbaceous Alliance This Community's Level: Association This Community's Children: [none]		Names:   Translated: Snakeweed / Big Galleta Shrub Herbaceous Vegetation   UID: ELEMENT_GLOBAL.2.689383 NatureServe Explorer   Scientific: Gutierrezia sarothrae / Pleuraphis rigida Shrub Herbaceous Vegetation   Code: CEGL001543 (convergence) and Synonyms: (undetermined) Gutierrezia sarothrae / Pleuraphis rigida Shrub Herbaceous Vegetation