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Gutierrezia sarothrae / Pleuraphis rigida - Sphaeralcea ambigua Shrub Grassland | NatureServe Biotics 2019
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Name: Gutierrezia sarothrae / Pleuraphis rigida - Sphaeralcea ambigua Shrub Grassland Reference: NatureServe Biotics 2019 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</i> and the annual exotic grass <i>Bromus tectorum</i>. Other characteristic grasses include <i>Achnatherum 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>Cylindropuntia whipplei, Opuntia phaeacantha, Opuntia polyacantha var. erinacea, Coryphantha</i> spp. and the rosette, <i>Yucca baccata</i>. Other common annual forbs are <i>Plantago ovata, Eriogonum inflatum, Cleome lutea</i>, and the exotic <i>Salsola kali</i>. The association is also found in the central and northern Mojave Desert such as at mid elevations in the Panamint Mountains of Death Valley National Park and at high elevations in the eastern half of Mojave National Preserve, California.  Accession Code: urn:lsid:vegbank.org:commConcept:30452-{B5C8F73E-9916-44B5-AA4E-970B05755781} Plot-observations of this Community Concept: 0
	Party Perspective according to: NatureServe (organization) Perspective from: 06-Jan-2017 to: ongoing
	status: accepted Community's Parent: Gutierrezia sarothrae - Gutierrezia microcephala Dwarf-shrubland Alliance This Community's Level: Association This Community's Children: [none]		Names:   UID: ELEMENT_GLOBAL.2.689383 NatureServe Explorer   Code: CEGL001543   Translated: Broom Snakeweed / Big Galleta - Desert Globemallow Shrub Grassland   Scientific: Gutierrezia sarothrae / Pleuraphis rigida - Sphaeralcea ambigua Shrub Grassland (convergence) and Synonyms: (similar) CEGL001543 (similar) Gutierrezia sarothrae / Pleuraphis rigida Shrub Herbaceous Vegetation (similar) Gutierrezia sarothrae / Pleuraphis rigida Shrub Herbaceous Vegetation