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Grayia spinosa / Achnatherum hymenoides Shrubland | NatureServe Biotics 2019
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Name: Grayia spinosa / Achnatherum hymenoides Shrubland Reference: NatureServe Biotics 2019 Description: This unusual shrubland association is known from isolated occurrences in northwestern Colorado and is reported from northern Nevada, Wyoming and southeastern Oregon. It is likely also to occur in eastern California. It occurs on level to gently sloping benches, partly stabilized dunes and terraces. Elevations range from 1600 to 1800 m (5250-5900 feet). Soils are deep, well-drained, alkaline sandy loams or loamy sands derived from underlying bedrock or eolian sands. Soil lichens, mosses and litter may have significant cover, especially in areas that have not been grazed in recent decades. The vegetation is characterized by the co-occurrence of <i>Grayia spinosa, Sarcobatus vermiculatus</i>, and <i>Artemisia tridentata ssp. wyomingensis</i>, although in some stands either <i>Artemisia</i> or <i>Sarcobatus</i> may be missing. Total shrub cover is typically 30% or less. Other shrubs may occasionally be present with low cover, including <i>Chrysothamnus viscidiflorus, Atriplex confertifolia</i>, and <i>Ephedra</i> spp. Commonly associated species in the herbaceous layer include native grasses <i>Achnatherum hymenoides, Distichlis spicata, Hesperostipa comata, Poa secunda</i>, and the exotic annual grass <i>Bromus tectorum</i>. Forbs are absent to sparse in cover and inconsistent in composition. Total herbaceous cover is typically less than 10%, with no single species except <i>Bromus tectorum</i> regularly exceeding 5% cover. Scattered juniper are occasionally present.  Accession Code: urn:lsid:vegbank.org:commConcept:30259-{6F4167E5-239E-4FF2-B77E-5E70D0CE8B28} Plot-observations of this Community Concept: 0
	Party Perspective according to: NatureServe (organization) Perspective from: 12-Oct-2005 to: ongoing
	status: accepted Community's Parent: Grayia spinosa Scrub Alliance This Community's Level: Association This Community's Children: [none]		Names:   UID: ELEMENT_GLOBAL.2.686778 NatureServe Explorer   Code: CEGL001350   Translated: Spiny Hopsage / Indian Ricegrass Shrubland   Scientific: Grayia spinosa / Achnatherum hymenoides Shrubland (convergence) and Synonyms: (similar) CEGL001350 (similar) Grayia spinosa / Achnatherum hymenoides Shrubland (similar) Grayia spinosa / Achnatherum hymenoides Shrubland