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Quercus garryana / Festuca (roemeri, rubra) Wooded Herbaceous Vegetation | Western Ecology Working Group of...
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Name: Quercus garryana / Festuca (roemeri, rubra) Wooded Herbaceous Vegetation Reference: Western Ecology Working Group of... Description: This association is known from a few remaining sites in the Puget Lowland and Willamette Valley in western Washington and Oregon, the eastern slope of the Washington Cascades on the Yakima Indian Reservation, the Columbia River Gorge in Washington, and northwestern California. This association occurs at the lowermost boundary of woodland and forest vegetation, on hot, dry sites. It is found at low elevations, particularly in the Columbia River Gorge, on southerly aspects. Annual precipitation is relatively low, and there is a distinct summer dry season. Soils are moderately deep, rocky silt loams to loams, derived from mixed colluvium of basaltic materials with a minor component of loess. Vegetation characteristic of this association is dominated by the perennial grasses Festuca roemeri (= Festuca idahoensis var. roemeri) or Festuca rubra with a sparse tree layer of Quercus garryana (10-30% canopy cover). The open woody canopy may have dense clumps because of the clonal nature of the species. Other tree species may include occasional Pinus ponderosa individuals. An open short-shrub layer of Purshia tridentata is present in some stands. Grazing by livestock and fire suppression have favored woody species over grasses and brought in introduced species. No other information is available on species cover except that introduced herbaceous species, such as Bromus tectorum, Cynosurus spp., Poa bulbosa, and Ventenata dubia, are common in disturbed stands. Information on stands in California was not available. Diagnostic of this association is a Festuca roemeri- or Festuca rubra-dominated grassland with a very open tree layer dominated by Quercus garryana.  Accession Code: VB.CC.22972.QUERCUSGARRYANA Plot-observations of this Community Concept: 0
	Party Perspective according to: NatureServe (organization) Perspective from: 26-Nov-1997 to: 17-Nov-2014
	status: accepted Community's Parent: Quercus garryana Wooded Herbaceous Alliance This Community's Level: Association This Community's Children: [none]		Names:   Translated: Oregon White Oak / (Roemer's Fescue, Red Fescue) Wooded Herbaceous Vegetation   UID: ELEMENT_GLOBAL.2.686303 NatureServe Explorer   Code: CEGL001714   Scientific: Quercus garryana / Festuca (roemeri, rubra) Wooded Herbaceous Vegetation   Common: Oregon White Oak Savanna (convergence) and Synonyms: (undetermined) Quercus garryana / Festuca (roemeri, rubra) Wooded Herbaceous Vegetation