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Quercus garryana - Quercus kelloggii / Toxicodendron diversilobum Woodland | NatureServe Biotics 2019
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Name: Quercus garryana - Quercus kelloggii / Toxicodendron diversilobum Woodland
Reference: NatureServe Biotics 2019
Description: This mixed woodland occurs in northern California and southwestern Oregon. Large stands of this community are rare. Generally it is found on valley bottoms or south-facing slopes in a mixed conifer-hardwood matrix. This association is dominated by <i>Quercus garryana</i> and <i>Quercus kelloggii</i>. Many stands show some invasion of conifers, primarily <i>Pseudotsuga menziesii</i> and <i>Pinus ponderosa</i>, but in no stands of this community are conifers found in the canopy. <i>Arbutus menziesii</i> can be codominant in stands, and is occasionally included in the association name. Canopy varies from very open to fairly closed woodlands (15-70%). In high-quality stands, the trees are large and fairly widely spaced. With extended fire suppression, trees become more dense and smaller. The shrub layer is dominated by <i>Toxicodendron diversilobum</i>. On flats and moister aspects, <i>Symphoricarpos albus</i> and <i>Rosa gymnocarpa</i> can be found, in some areas with introduced <i>Rubus</i> species. Grasses dominate the forb layer in good condition stands, with <i>Elymus glaucus, Festuca californica, Melica</i> spp. dominant. Due to impacts of livestock, introduced grasses (<i>Arrhenatherum elatius, Taeniatherum caput-medusae, Cynosurus echinatus</i>, and <i>Dactylis glomerata</i>) and forbs (<i>Anthriscus caucalis, Daucus carota</i>, and <i>Centaurea</i> spp.) are more common understory components. According to historical records, it occurred as a savanna type and a woodland when widespread fires occurred across the landscape. <i>Quercus garryana - Quercus kelloggii</i> savannas are included in this type. 
Accession Code: urn:lsid:vegbank.org:commConcept:29840-{D1C804AB-4FCD-4214-A315-DB51420C7977}
Plot-observations of this Community Concept: 0
      Party Perspective according to: NatureServe (organization)
Perspective from: 26-Nov-1997 to: ongoing
      Names:   UID: ELEMENT_GLOBAL.2.689932 NatureServe ExplorerNatureServe Explorer logo
  Code: CEGL000931
  Translated: Oregon White Oak - California Black Oak / Pacific Poison-oak Woodland
  Scientific: Quercus garryana - Quercus kelloggii / Toxicodendron diversilobum Woodland
(convergence) and Synonyms:
(similar) CEGL000931
(similar) Quercus garryana - Quercus kelloggii / Toxicodendron diversilobum Woodland
(similar) Quercus garryana - Quercus kelloggii / Toxicodendron diversilobum Woodland