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Juniperus occidentalis Shrubby Woodland Alliance | NatureServe Biotics 2019
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Name: Juniperus occidentalis Shrubby Woodland Alliance
Reference: NatureServe Biotics 2019
Description: Vegetation of this woodland alliance is characterized by an open to moderately dense canopy of <i>Juniperus occidentalis</i> with a moderately dense to dense shrub layer. <i>Juniperus occidentalis</i> is typically the only tree species, although <i>Pinus ponderosa</i> may be present in some stands. <i>Pinus jeffreyi</i> may occasionally occur in stands of this alliance in extreme northeastern California. The tree form of <i>Cercocarpus ledifolius</i> may occasionally codominate. The shrub layer is dominated by <i>Artemisia tridentata</i> as the most common shrub; others are <i>Cercocarpus ledifolius</i> (shrub form), <i>Chrysothamnus viscidiflorus, Ericameria nauseosa, Purshia tridentata, Ribes cereum</i>, and <i>Symphoricarpos oreophilus</i>. A sparse to moderately dense herbaceous layer may be present that is typically dominated by graminoids such as <i>Carex filifolia, Festuca idahoensis, Poa secunda</i>, and <i>Pseudoroegneria spicata</i>. This woodland alliance is found on the Columbia Plateau and extends to the northern and western margins of the Great Basin, from southwestern Idaho to the eastern foothills of the Cascades, and south to the Modoc Plateau of northeastern California. Stands range in elevation from under 200 m along the Columbia River in central Washington to over 1800 m in southwestern Idaho. Generally soils are medium-textured, with abundant coarse fragments, and derived from volcanic parent materials. In central Oregon, the center of distribution, all aspects and slope positions occur. Where this alliance grades into relatively mesic forest or grassland habitats, these woodlands become restricted to rock outcrops and escarpments having xeric soils. 
Accession Code: urn:lsid:vegbank.org:commConcept:38783-{866A52DF-E6FE-4129-8401-18A24EC87EA1}
Plot-observations of this Community Concept: 0
      Party Perspective according to: NatureServe (organization)
Perspective from: 14-Mar-2014 to: ongoing
      Names:   UID: ELEMENT_GLOBAL.2.899621 NatureServe ExplorerNatureServe Explorer logo
  Code: A3499
  Translated: Western Juniper Shrubby Woodland Alliance
  Common: Western Juniper Shrubby Woodland
  Scientific: Juniperus occidentalis Shrubby Woodland Alliance