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Ambrosia dumosa Dwarf-shrubland | NatureServe Biotics 2019
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Name: Ambrosia dumosa Dwarf-shrubland Reference: NatureServe Biotics 2019 Description: This white bursage shrubland association occurs in the Mojave Desert of California, as well as northwestern Arizona and southern Nevada. It is currently described from Grand Canyon National Park and Grand Canyon-Parashant National Monument in Arizona. More survey and classification work are needed to fully characterize this type. It primarily occurs on sideslopes and plateaus at 475 to 575 m (1600 to 1875 feet) elevation; it rarely occurs as high as 625 m (2025 feet). This association is typically found on moderately sloping gradients (10-15°), but occasionally occurs on much flatter slopes (0-4°). Soils are rapidly-drained sands or sandy loams that lie on top of limestone or sandstone. <i>Ambrosia dumosa</i> dominates the dwarf-shrub layer and characterizes this vegetation type. Tall shrubs such as <i>Larrea tridentata</i> occasionally occur in a poorly-defined stratum. <i>Cylindropuntia acanthocarpa, Ephedra torreyana</i>, and <i>Encelia farinosa</i> regularly occur in a sparse short-shrub layer. The cactus <i>Opuntia basilaris</i> is commonly found in the dwarf-shrub layer. <i>Bromus rubens</i> and <i>Vulpia octoflora</i> occur occasionally in the sparse graminoid layer. <i>Eriogonum inflatum, Gilia</i> sp., <i>Cryptantha</i> spp., <i>Pectocarya</i> sp., and <i>Descurainia pinnata</i> are common forbs.  Accession Code: urn:lsid:vegbank.org:commConcept:33839-{80E03637-2A8B-47D1-A985-8358717360C1} Plot-observations of this Community Concept: 0
	Party Perspective according to: NatureServe (organization) Perspective from: 06-Jan-2017 to: ongoing
	status: accepted Community's Parent: Ambrosia dumosa Desert Dwarf Scrub Alliance This Community's Level: Association This Community's Children: [none]		Names:   UID: ELEMENT_GLOBAL.2.840541 NatureServe Explorer   Code: CEGL005074   Translated: Burrobush Dwarf-shrubland   Scientific: Ambrosia dumosa Dwarf-shrubland (convergence) and Synonyms: (similar) Ambrosia dumosa Dwarf-shrubland