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Eriogonum deserticola Sparsely Vegetated Alliance | Western Ecology Working Group of...
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Name: Eriogonum deserticola Sparsely Vegetated Alliance Reference: Western Ecology Working Group of... Description: Sparse stands of dune vegetation included in this alliance occur in the lower Sonoran and Colorado deserts below 100 m elevation. The climate is arid. Summer temperatures are hot, and winters only rarely dip below freezing. Precipitation has a bimodal distribution with almost half occurring from July to September and the rest occurring during the winter months. Annual precipitation varies greatly year to year. Stands occur on active and partially stabilized dunes. Sites are level to steep and occur on all aspects. Substrate is deep, shifting dune sand. This alliance includes the sparse stands of vegetation that occur on active dunes in southwestern Arizona. Total vegetation canopy cover may be less than 10% and is dominated by the dwarf-shrub Eriogonum deserticola. The perennial bunchgrass Pleuraphis rigida (= Hilaria rigida) is codominant in some stands. Species diversity is typically low compared to adjacent vegetation. Stands in the Yuma Desert have cover values of 9% total vegetation with 5.8% Eriogonum deserticola, 1.4% Ephedra trifurca, and 1% Pleuraphis rigida. Other species present include shrubs and dwarf-shrubs, such as Ambrosia dumosa, Croton wigginsii, Larrea tridentata, Parkinsonia microphylla, Psorothamnus emoryi, and the forbs Brassica tournefortii, Cryptantha sp., Dicoria canescens, and Palafoxia arida. Adjacent vegetation is Larrea tridentata and Ambrosia dumosa desertscrub.  Accession Code: VB.CC.18791.ERIOGONUMDESERT Plot-observations of this Community Concept: 0
	Party Perspective according to: NatureServe (organization) Perspective from: 26-Nov-1997 to: 01-May-2019
	status: accepted This Community's Level: Alliance This Community's Children: [none]		Names:   Scientific: Eriogonum deserticola Sparsely Vegetated Alliance   Translated: Colorado Desert Wild Buckwheat Sparsely Vegetated Alliance   UID: HIGHER_CLASS_UNIT.2.125766 NatureServe Explorer   Code: A.1856