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Parkinsonia florida - Olneya tesota Woodland Alliance | Western Ecology Working Group of...
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Name: Parkinsonia florida - Olneya tesota Woodland Alliance Reference: Western Ecology Working Group of... Description: Woodlands included in this alliance occur in southern California, and possibly southwestern Arizona and adjacent Mexico. Elevation ranges from -10- to 500 m. The climate is arid and subtropical, without hard freezes during the winter. Amount and season of precipitation are highly variable from year to year. In the more arid Colorado Desert, stands are generally restricted to the margins of washes and braided, unstable channels on bajadas, but may occur on terraces if the water table is not deep. Sites are generally flat or gently sloping, and the vegetation occurs on all aspects. Parent material is usually sandy or gravelly alluvium. Substrates are coarse-textured, but may include gravelly silty loams. The soils are generally not saline. These semi-riparian woodlands usually occur as two strips of vegetation along the banks of a broad, sandy wash bed. Stands have moderate to dense cover dominated by the xeromorphic evergreen and deciduous trees Parkinsonia florida and Olneya tesota. Other associated shrubs and trees may include Ambrosia spp., Acacia greggii, Chilopsis linearis, Hymenoclea salsola, Lycium spp., Parkinsonia microphylla, Prosopis glandulosa, Prosopis pubescens, Psorothamnus spinosus, and Ziziphus obtusifolia. Perennial herbaceous cover is sparse, but annual grasses and forbs can be seasonally abundant. These woodlands are surrounded by a matrix of desert shrubland dominated by Larrea tridentata or Ambrosia spp.  Accession Code: VB.CC.26191.PARKINSONIAFLOR 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: Parkinsonia florida - Olneya tesota Woodland Alliance   Translated: Blue Paloverde - Desert-ironwood Woodland Alliance   UID: HIGHER_CLASS_UNIT.2.125056 NatureServe Explorer   Code: A.588