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Achnatherum speciosum Grassland Alliance | NatureServe Biotics 2019
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Name: Achnatherum speciosum Grassland Alliance
Reference: NatureServe Biotics 2019
Description: Stands of this alliance are dominated by <i>Achnatherum speciosum</i>, which is the sole dominant or important plant in the herbaceous layer. Species composition varies among stands, but <i>Achnatherum speciosum</i> is the unifying species. Other graminoids which may be present include <i>Achnatherum hymenoides, Elymus elymoides, Nassella cernua, Nassella lepida</i>, and <i>Poa secunda</i>. Scattered emergent shrubs such as <i>Hymenoclea salsola</i> may be present. This uncommon grassland is documented from the Mojave Desert. It grows in very xeric conditions with hot summers and occasional freezes in the winter. This alliance requires well-drained rocky or sandy soils. It was formerly widespread, but overgrazing has decimated stands. Remaining stands occur from 600-1000 m elevation on flat ridges, lower slopes, valleys, and washes. 
Accession Code: urn:lsid:vegbank.org:commConcept:38199-{3E019900-06C9-444A-ABDD-6D807BD51745}
Plot-observations of this Community Concept: 0
      Party Perspective according to: NatureServe (organization)
Perspective from: 14-Mar-2014 to: ongoing
      Names:   UID: ELEMENT_GLOBAL.2.899106 NatureServe ExplorerNatureServe Explorer logo
  Code: A1290
  Translated: Desert Needlegrass Grassland Alliance
  Common: Desert Needlegrass Grassland
  Scientific: Achnatherum speciosum Grassland Alliance
(convergence) and Synonyms:
(similar) A.1290
(similar) Achnatherum speciosum Herbaceous Alliance