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Achnatherum hymenoides Shrub Herbaceous Alliance | Western Ecology Working Group of...
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Name: Achnatherum hymenoides Shrub Herbaceous Alliance
Reference: Western Ecology Working Group of...
Description: Stands of this alliance occur on mesas, hillslopes, sand dunes, and along drainage channels on the Colorado Plateau and Great Basin. Elevation ranges from 1530-1920 m. Climate is semi-arid. Slopes vary from 0-30% depending on landform. All aspects are possible. The soil ranges from sand to sandy loam derived from aeolian deposits overlaying sandstone. Vegetation included in this alliance is characterized by a moderately dense graminoid layer (25-40% cover) dominated by the medium-tall bunchgrass Achnatherum hymenoides (= Oryzopsis hymenoides), with a sparse (10-25% cover) xeromorphic short-shrub layer typically dominated by Ephedra viridis or Ephedra torreyana mixed with occasional Artemisia bigelovii, Atriplex canescens, Ericameria nauseosa, Eriogonum corymbosum, Gutierrezia sarothrae, or Parryella filifolia. Bouteloua gracilis, Hesperostipa comata (= Stipa comata), Muhlenbergia porteri, Pleuraphis jamesii, Sporobolus airoides, or Sporobolus cryptandrus may be present to codominant. Forbs have sparse cover. 
Accession Code: VB.CC.26143.ACHNATHERUMHYME
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: Achnatherum hymenoides Shrub Herbaceous Alliance
  Translated: Indian Ricegrass Shrub Herbaceous Alliance
  UID: HIGHER_CLASS_UNIT.2.125602 NatureServe ExplorerNatureServe Explorer logo
  Code: A.1543