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Acacia greggii Shrubland Alliance | Western Ecology Working Group of...
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Name: Acacia greggii Shrubland Alliance Reference: Western Ecology Working Group of... Description: Shrublands included in this Sonoran Desert alliance occur on upland flats above bajada and arroyo shrublands. Elevation ranges from 480-760 m. Climate is arid and hot with half to two-thirds of the 18-32 cm of annual precipitation falling during the summer monsoon season. Substrates are alluvium derived from granite and schist. Soils are shallow, gravelly clay and clay loams. The dominant shrub is Acacia greggii. Other characteristic species are Parkinsonia microphylla, Opuntia acanthocarpa, Larrea tridentata, Ericameria laricifolia, Krameria grayi, Acacia constricta, and Prosopis velutina. The dominance of Acacia greggii and the lack of Lycium exsertum and Ambrosia deltoidea are key characteristics that separate these shrublands from the more common Ambrosia deltoidea-dominated bajada shrublands. The herbaceous layer is typically sparse and includes seasonally present annual forbs such as Lasthenia californica. Adjacent vegetation is composed of shrublands usually dominated by Ambrosia deltoidea.  Accession Code: VB.CC.25737.ACACIAGREGGIISH Plot-observations of this Community Concept: 0
	Party Perspective according to: NatureServe (organization) Perspective from: 26-Nov-1997 to: 01-May-2019
	status: accepted This Community's Level: Alliance This Community's Children: [none]		Names:   Scientific: Acacia greggii Shrubland Alliance   Translated: Catclaw Acacia Shrubland Alliance   UID: HIGHER_CLASS_UNIT.2.125558 NatureServe Explorer   Code: A.1036