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Psorothamnus spinosus / Hymenoclea salsola - (Bebbia juncea, Ephedra californica) Desert Wash Scrub | NatureServe Biotics 2019
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Name: Psorothamnus spinosus / Hymenoclea salsola - (Bebbia juncea, Ephedra californica) Desert Wash Scrub Reference: NatureServe Biotics 2019 Description: This desert wash scrub association is found in the Mojave Desert and northern and eastern Colorado Desert in California and Nevada. It forms an open to intermittent microphyllous tall-shrub or tree canopy that ranges from 2 to 10% cover dominated by <i>Psorothamnus spinosus</i> sometimes with scattered <i>Chilopsis linearis</i>. There is also a sparse to open short-shrub layer (1-13% cover) dominated or codominated by <i>Hymenoclea salsola</i> and other wash-associated shrubs such as <i>Acacia greggii, Bebbia juncea</i>, and <i>Ephedra californica</i>. Herbaceous cover is typically sparse (&lt;10% cover) and incudes associated species <i>Brandegea bigelovii, Chamaesyce</i> spp., <i>Cryptantha</i> spp., <i>Cucurbita palmata, Datura wrightii, Lepidium fremontii, Stephanomeria pauciflora</i>, and exotics <i>Erodium cicutarium</i> and <i>Schismus</i> spp. Biological soil crusts are often present but not abundant. Stands primarily occur on gently sloping (1-7°), active sandy washes/channel beds at low to mid elevations (200-1000 m). Sites have low- to mid-slope topographic positions in broad valleys, basins and alluvial fans. Soils are alluvial sand deposits or loamy sand with variable amounts of gravel (2-87%) depending on the parent material. Some stands are on granite with some volcanic rock fragments, gravel and sand sediments prevailing. These sites generally experience low levels of disturbance from competition from exotics and moderate levels of disturbance from road/trail construction/maintenance.  Accession Code: urn:lsid:vegbank.org:commConcept:37512-{7562469F-C753-4EEE-B7DD-EFE78E8BDB3A} Plot-observations of this Community Concept: 0
	Party Perspective according to: NatureServe (organization) Perspective from: 27-Jul-2018 to: ongoing
	status: provisional Community's Parent: Chilopsis linearis - Psorothamnus spinosus Desert Wash Scrub Alliance This Community's Level: Association This Community's Children: [none]		Names:   UID: ELEMENT_GLOBAL.2.972037   Code: CEPP006745   Translated: Smoketree / Burrobrush - (Sweetbush, California Joint-fir) Desert Wash Scrub   Scientific: Psorothamnus spinosus / Hymenoclea salsola - (Bebbia juncea, Ephedra californica) Desert Wash Scrub