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Psorothamnus spinosus / Acacia greggii - (Hyptis emoryi) Desert Wash Shrubland | NatureServe Biotics 2019
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Name: Psorothamnus spinosus / Acacia greggii - (Hyptis emoryi) Desert Wash Shrubland
Reference: NatureServe Biotics 2019
Description: This association is currently only described from Joshua Tree National Park, California. Additional global information will be added as it becomes available. Stands form a sparse to open shrubland with 0-6% cover in the tree/tall stratum, 4-14% cover in the shrub/mid stratum, and 5% cover in the herb/low stratum. Total vegetation cover ranges from 5-15%. Characteristic species of this association are <i>Psorothamnus spinosus</i> in the tree layer and <i>Acacia greggii, Hymenoclea salsola</i>, and <i>Larrea tridentata</i> in the shrub layer. <i>Hyptis emoryi</i> along with <i>Acacia greggii</i> and <i>Hymenoclea salsola</i> exhibit the highest cover of shrubs. Cryptobioic crusts and <i>Chamaesyce</i> spp. are often present. Stands are found at low to mid elevations (400-1000 m [1200-3200 feet]) on primarily northeasterly slope aspects in sandy and gravelly, active washes. Slopes are gentle (2°) with flat, undulating, or hummocky and swaley topographies. Soils range from sands to loams derived from granitic parent materials. Ground cover consists of 0-3% bedrock, 0% boulder, 0% stone, 0-25% cobble, 3-63% gravel, and 25-85% fines. Litter ranges from 0-5% cover. These sites generally experience low levels of disturbance from competition from exotics and moderate levels of disturbance from vandalism/dumping/litter. 
Accession Code: urn:lsid:vegbank.org:commConcept:37511-{565F2211-7D01-401E-8A83-A961A5F0FD4D}
Plot-observations of this Community Concept: 0
      Party Perspective according to: NatureServe (organization)
Perspective from: 20-Aug-2018 to: ongoing
      Names:   UID: ELEMENT_GLOBAL.2.972836
  Code: CEPP006744
  Translated: Smoketree / Catclaw Acacia - (Desert-lavender) Desert Wash Shrubland
  Scientific: Psorothamnus spinosus / Acacia greggii - (Hyptis emoryi) Desert Wash Shrubland