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Quercus garryana - Pseudotsuga menziesii / Toxicodendron diversilobum Forest & Woodland Alliance | NatureServe Biotics 2019
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Name: Quercus garryana - Pseudotsuga menziesii / Toxicodendron diversilobum Forest & Woodland Alliance
Reference: NatureServe Biotics 2019
Description: This alliance consists of savanna, woodland and forest dominated by <i>Quercus garryana</i>. Codominance by the evergreen conifer <i>Pseudotsuga menziesii</i> is common, and <i>Pinus ponderosa</i> is important in some stands with mesic indicator species in the undergrowth. In the south, common associates also include <i>Quercus kelloggii</i> and <i>Arbutus menziesii</i>. The predominant oaks in areas of higher fire frequency include <i>Quercus kelloggii</i> and <i>Quercus garryana</i>, with <i>Quercus garryana var. garryana</i> codominant in the central and northern Coast Ranges. The perennial bunchgrass component includes <i>Festuca idahoensis, Festuca californica, Elymus glaucus</i>, and <i>Danthonia californica</i> (close to the coast). A variety of native forbs also occur. Other characteristic species include <i>Toxicodendron diversilobum, Juniperus occidentalis</i>, and <i>Ceanothus cuneatus</i>. This alliance occurs in southwestern British Columbia, in the Puget Trough and Willamette Valley south into the Klamath Mountains and into northern California, where it is found in the northern portions of the Sierra Nevada and Coast Ranges foothills at lower montane elevations from 600-1600 m (1800-4850 feet) on steep, rocky slopes where snow and cold temperatures occur. This alliance is associated with dry, predominantly low-elevation sites and/or sites that experienced frequent presettlement fires. 
Accession Code: urn:lsid:vegbank.org:commConcept:38615-{CDAA04C0-DD6C-4C07-B1AA-525435F1EAED}
Plot-observations of this Community Concept: 0
      Party Perspective according to: NatureServe (organization)
Perspective from: 18-Dec-2014 to: ongoing
      Names:   UID: ELEMENT_GLOBAL.2.899452 NatureServe ExplorerNatureServe Explorer logo
  Code: A3328
  Translated: Oregon White Oak - Douglas-fir / Pacific Poison-oak Forest & Woodland Alliance
  Common: West Cascadian Dry White Oak - Douglas-fir Forest & Woodland
  Scientific: Quercus garryana - Pseudotsuga menziesii / Toxicodendron diversilobum Forest & Woodland Alliance