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Ambrosia dumosa / Pleuraphis rigida Dwarf-shrubland | Western Ecology Working Group of...
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Name: Ambrosia dumosa / Pleuraphis rigida Dwarf-shrubland Reference: Western Ecology Working Group of... Description: Sparse, desert sand dune association. Occurs on active to partially stabilized desert sand dunes in the northern Sonoran desert, between 290 and 1000 feet of elevation. Ambrosia dumosa and Pleuraphis rigida (= Hilaria rigida) codominate, though a number of other dune-adapted, shrubby perennial plants may occur. Occasionally common are Ephedra trifurca, Croton californicus, Croton wigginsii, Eriogonum deserticola, and Psorothamnus emoryi. Cover of shrubs and Pleuraphis rigida together varies from 5-20% depending on slope aspect and dune activity. Diagnostic species include Abronia villosa var. villosa, Dicoria canescens and the rare taxa Chamaesyce platysperma, Croton wigginsii, Eriogonum deserticola, Helianthus niveus ssp. tephrodes, Palafoxia arida var. gigantea, and Psorothamnus emoryi. Additional rare species that may be found include Stephanomeria schottii, Pholisma sonorae (= Ammobroma sonorae) and Triteleiopsis palmeri. This association contains a high number of ephemeral forbs; in the Gran Desierto dunes, ephemerals comprise up to 63.5% of the flora. Ephemeral forbs include Dimorphocarpa pinnatifida, Dicoria canescens, Lupinus arizonicus, and Oenothera deltoides.  Accession Code: VB.CC.24442.AMBROSIADUMOSAP Plot-observations of this Community Concept: 0
	Party Perspective according to: NatureServe (organization) Perspective from: 26-Nov-1997 to: 17-Nov-2014
	status: accepted Community's Parent: Ambrosia dumosa Dwarf-shrubland Alliance This Community's Level: Association This Community's Children: [none]		Names:   Translated: White Burrobush / Big Galleta Dwarf-shrubland   UID: ELEMENT_GLOBAL.2.687442 NatureServe Explorer   Code: CEGL000955   Scientific: Ambrosia dumosa / Pleuraphis rigida Dwarf-shrubland   Common: White Bursage / Big Galleta Sparse Dwarf-shrubland (convergence) and Synonyms: (undetermined) Ambrosia dumosa / Pleuraphis rigida Dwarf-shrubland