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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. However, it may be determined that this vegetation represents more than one association and may warrant being split. As currently defined, 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 <i>Pleuraphis rigida (= Hilaria rigida)</i> and the annual exotic grass <i>Bromus tectorum</i>. Other characteristic grasses include <i>Achnatherum hymenoides (= Oryzopsis hymenoides)</i> and species of <i>Aristida, Bouteloua, Muhlenbergia</i> and <i>Stipa</i>. The dwarf-shrub, <i>Gutierrezia sarothrae</i>, dominates the woody layer. Other characteristic shrubs and dwarf-shrubs include <i>Atriplex canescens, Lycium pallidum, Krascheninnikovia lanata</i> and <i>Ephedra viridis</i>. Succulents may include the cacti, <i>Opuntia whipplei, Opuntia phaeacantha, Opuntia erinacea, Coryphantha</i> spp. and the rosette, <i>Yucca baccata</i>. Other common annual forbs are <i>Plantago ovata (= Plantago insularis), Eriogonum inflatum, Cleome lutea</i>, and the exotic <i>Salsola kali</i>.  Accession Code: VB.CC.33872.CEGL001543 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.2.689383 NatureServe Explorer   Translated: Broom Snakeweed / Big Galleta Shrub Herbaceous Vegetation   Scientific: Gutierrezia sarothrae / Pleuraphis rigida Shrub Herbaceous Vegetation   Code: CEGL001543