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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: This is a sparse, desert sand dune association. It occurs on active to partially stabilized desert sand dunes in the northern Sonoran Desert, between 88 and 305 m (290-1000 feet) of elevation. <i>Ambrosia dumosa</i> and <i>Pleuraphis rigida (= Hilaria rigida)</i> codominate, though a number of other dune-adapted, shrubby perennial plants may occur. Occasionally common are <i>Ephedra trifurca, Croton californicus, Croton wigginsii, Eriogonum deserticola</i>, and <i>Psorothamnus emoryi</i>. Cover of shrubs and <i>Pleuraphis rigida</i> together varies from 5-20% depending on slope aspect and dune activity. Diagnostic species include <i>Abronia villosa var. villosa, Dicoria canescens</i> and the rare taxa <i>Chamaesyce platysperma, Croton wigginsii, Eriogonum deserticola, Helianthus niveus ssp. tephrodes, Palafoxia arida var. gigantea</i>, and <i>Psorothamnus emoryi</i>. Additional rare species that may be found include <i>Stephanomeria schottii, Pholisma sonorae (= Ammobroma sonorae)</i> and <i>Triteleiopsis palmeri</i>. 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 <i>Dimorphocarpa pinnatifida, Dicoria canescens, Lupinus arizonicus</i>, and <i>Oenothera deltoides</i>. 
Accession Code: VB.CC.34205.CEGL000955
Plot-observations of this Community Concept: 0
      Party Perspective according to: NatureServe (organization)
Perspective from: 17-Nov-2014 to: 01-May-2019
     
  • status: accepted
  • This Community's Level: association
  • This Community's Children: [none]
Names:   UID: ELEMENT_GLOBAL.2.687442 NatureServe ExplorerNatureServe Explorer logo
  Translated: Burrobush / Big Galleta Dwarf-shrubland
  Scientific: Ambrosia dumosa / Pleuraphis rigida Dwarf-shrubland
  Code: CEGL000955