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Purshia tridentata / Achnatherum hymenoides Shrubland | NatureServe Biotics 2019
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Name: Purshia tridentata / Achnatherum hymenoides Shrubland
Reference: NatureServe Biotics 2019
Description: A narrowly restricted community in Washington, it is found in isolated sand dune landscapes in Franklin, Grant, Yakima, Klickitat, and Benton counties. This community occurs in Oregon and Idaho as well. It is confined to sand dunes within the shrub-steppe zone in the driest and hotter parts of the Columbia Basin. This is a patchy vegetation with sparse to dense cover concentrated in two lifeforms: medium-tall shrubs and herbaceous plants. <i>Purshia tridentata</i>, typically 60-90 cm (2-3) feet tall, dominates portions of these communities and is completely absent in other portions. <i>Artemisia tridentata</i> and/or <i>Chrysothamnus viscidiflorus</i> or <i>Ericameria nauseosa</i> are usually present. All shrubs increase with intermittent disturbance. <i>Achnatherum hymenoides</i>, a bunchgrass, and <i>Elymus lanceolatus</i>, a rhizomatous grass, are the most conspicuous perennial grasses on dunes. <i>Hesperostipa comata, Koeleria macrantha</i>, or <i>Poa secunda</i> often appear in the deflation plains between dunes. <i>Eriogonum niveum</i> is a common but scattered feature of this community especially where gravel is present. <i>Psoralidium lanceolatum, Oenothera pallida, Pteryxia terebinthina</i>, and <i>Rumex venosus</i> are usually present but contribute little to total community cover. Exotic annuals, such as <i>Bromus tectorum</i> and <i>Salsola kali</i>, can be common. 
Accession Code: urn:lsid:vegbank.org:commConcept:29967-{88EC99B3-C805-477E-B77B-D3AA933DA7E2}
Plot-observations of this Community Concept: 0
      Party Perspective according to: NatureServe (organization)
Perspective from: 26-Nov-1997 to: ongoing
      Names:   UID: ELEMENT_GLOBAL.2.685501 NatureServe ExplorerNatureServe Explorer logo
  Code: CEGL001058
  Translated: Antelope Bitterbrush / Indian Ricegrass Shrubland
  Scientific: Purshia tridentata / Achnatherum hymenoides Shrubland
(convergence) and Synonyms:
(similar) CEGL001058
(similar) Purshia tridentata / Achnatherum hymenoides Shrubland
(similar) Purshia tridentata / Achnatherum hymenoides Shrubland