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Pseudotsuga menziesii - Quercus garryana / Toxicodendron diversilobum Woodland | Western Ecology Working Group of...
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Name: Pseudotsuga menziesii - Quercus garryana / Toxicodendron diversilobum Woodland
Reference: Western Ecology Working Group of...
Description: This woodland community occurs in the Willamette Valley of northwestern Oregon, south into California and probably north into Washington. Stands are most common on south and western aspects on low slopes (<20%). Soils are most often sedimentary in origin. Examples of this community are usually composed of younger Quercus garryana and Pseudotsuga menziesii forming a closed-canopy. Quercus garryana and Pseudotsuga menziesii dominate the tree canopy. The understory cover is dominated by Toxicodendron diversilobum (40-95%) with lesser amounts of Polystichum munitum (0-58%), Festuca rubra (2%), and introduced species including Rosa eglanteria (5%), Holcus lanatus (2%), Poa pratensis (5%), Agrostis spp. (2%) and Dactylis glomerata (3%). Quercus garryana seedlings accounted for 6% cover while no Pseudotsuga menziesii are reported in plots, but are probably present. The codominance of mature Pseudotsuga menziesii is likely a result of the suppression of fires that normally would have maintained an oak woodland free of substantial conifer cover. 
Accession Code: VB.CC.23126.PSEUDOTSUGAMENZ
Plot-observations of this Community Concept: 0
      Party Perspective according to: NatureServe (organization)
Perspective from: 26-Nov-1997 to: 17-Nov-2014
      Names:   UID: ELEMENT_GLOBAL.2.686627 NatureServe ExplorerNatureServe Explorer logo
  Code: CEGL000928
  Scientific: Pseudotsuga menziesii - Quercus garryana / Toxicodendron diversilobum Woodland
  Translated: Douglas-fir - Oregon White Oak / Pacific Poison-oak Woodland
(convergence) and Synonyms:
(undetermined) Pseudotsuga menziesii - Quercus garryana / Toxicodendron diversilobum Woodland