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Ambrosia dumosa - Encelia farinosa Dwarf-shrubland | NatureServe Biotics 2019
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Name: Ambrosia dumosa - Encelia farinosa Dwarf-shrubland Reference: NatureServe Biotics 2019 Description: This white bursage shrubland association occurs in Arizona, California and 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. This association primarily occurs on sideslopes at approximately 425 to 850 m (1375-2800 feet) elevation; it uncommonly occurs as high as 1050 m (3425 feet). It is typically found on moderately sloping gradients (10-20°), but occasionally occurs on much steeper slopes (30-40°) as well. Soils are well- to rapidly-drained silty or sandy loams that rarely contain clay. The underlying geology is usually limestone, shale, or infrequently basalt or quartzite. Vegetation is characterized by the codominance of the dwarf-shrub <i>Ambrosia dumosa</i> and the short shrub <i>Encelia farinosa</i>. Tall shrubs are rare, but some stands sporadically contain <i>Larrea tridentata</i>. The short-shrub layer frequently includes <i>Ephedra aspera</i> and <i>Ferocactus cylindraceus</i>. The cacti <i>Opuntia polyacantha</i> and <i>Opuntia basilaris</i> sporadically occur in the dwarf-shrub stratum. <i>Bromus rubens</i> and <i>Dasyochloa pulchella</i> commonly occur in a very weakly-developed graminoid layer. <i>Eriogonum inflatum</i> and <i>Sphaeralcea grossulariifolia</i> occasionally occur in a relatively sparse forb understory.  Accession Code: urn:lsid:vegbank.org:commConcept:33826-{960CEB6A-6661-4AE7-BA09-98B72A995FC9} 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: Encelia farinosa Desert Scrub Alliance This Community's Level: Association This Community's Children: [none]		Names:   UID: ELEMENT_GLOBAL.2.840538 NatureServe Explorer   Code: CEGL005061   Translated: Burrobush - Brittlebush Dwarf-shrubland   Scientific: Ambrosia dumosa - Encelia farinosa Dwarf-shrubland (convergence) and Synonyms: (similar) Ambrosia dumosa - Encelia farinosa Dwarf-shrubland