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Larrea tridentata - Ambrosia dumosa - Krameria (erecta, grayi) Shrubland | NatureServe Biotics 2019
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Name: Larrea tridentata - Ambrosia dumosa - Krameria (erecta, grayi) Shrubland Reference: NatureServe Biotics 2019 Description: This creosotebush 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. It occurs on a variety of landforms including sideslopes, drainage bottoms, and ridges at 375 to 625 m (1250-2075 feet) elevation, but can be found as high as 875 m (2850 feet). It is typically found on low gradients (1-5°), but occasionally occurs on steeper slopes (10-30°). The community seems to occur across all aspects besides west-facing, and seems to occur in various soil types. Vegetation is characterized by the codominance of three species: the tall shrub <i>Larrea tridentata</i>, the short shrub <i>Krameria grayi</i>, and the dwarf-shrub <i>Ambrosia dumosa</i>. The short-shrub layer also frequently supports the cactus <i>Cylindropuntia acanthocarpa</i> and occasionally <i>Krameria erecta</i>. <i>Opuntia basilaris</i> is the only other dwarf-shrub that occurs regularly. <i>Bromus rubens</i> (exotic) and <i>Vulpia octoflora</i> are common in the sparse graminoid understory. <i>Plantago ovata, Antheropeas lanosum</i>, and <i>Erodium cicutarium</i> (exotic) are common members of the very sparse forb stratum.  Accession Code: urn:lsid:vegbank.org:commConcept:33902-{9B640A9B-3FC9-43B8-AF68-82E8796F399E} 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: Larrea tridentata - Ambrosia dumosa Bajada & Valley Desert Scrub Alliance This Community's Level: Association This Community's Children: [none]		Names:   UID: ELEMENT_GLOBAL.2.840590 NatureServe Explorer   Code: CEGL005137   Translated: Creosotebush - Burrobush - (Littleleaf Ratany, White Ratany) Shrubland   Scientific: Larrea tridentata - Ambrosia dumosa - Krameria (erecta, grayi) Shrubland (convergence) and Synonyms: (similar) Larrea tridentata - Ambrosia dumosa - Krameria (erecta, grayi) Shrubland