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Abies grandis - Tsuga heterophylla / Clintonia uniflora Forest | Western Ecology Working Group of...
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Name: Abies grandis - Tsuga heterophylla / Clintonia uniflora Forest Reference: Western Ecology Working Group of... Description: This herb-rich coniferous forest association is found on the eastern slope of the Oregon Cascades. Stands are found around 1000 m elevation near streams or in areas where cool, moist air flows down from above. The canyon topography coupled with the lower slope position favored by this association assures a moist, cool environment with low fire risk. Precipitation averages 135 cm annually. Soils are fine, sandy loams derived from Breccia or ash over basalt parent material. The tree canopy averages nearly 90% cover and is dominated by Abies grandis and Pseudotsuga menziesii with substantial (up to 20%) cover of Tsuga heterophylla. Additional conifers present in the overstory may include Thuja plicata, Taxus brevifolia, Larix occidentalis, and/or Pinus ponderosa. The shrub layer is characterized by dense patches of Mahonia nervosa (= var. nervosa), Acer circinatum and Rosa gymnocarpa. Symphoricarpos mollis is usually present and may become abundant where ground disturbance has occurred in mature stands. The herbaceous layer contains species characteristic of mesic eastside conditions: Linnaea borealis, Achlys triphylla, Maianthemum stellatum (= Smilacina stellata), Viola glabella, Viola sempervirens, and Clintonia uniflora.  Accession Code: VB.CC.25320.ABIESGRANDISTSU 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: Abies grandis Forest Alliance This Community's Level: Association This Community's Children: [none]		Names:   Translated: Grand Fir - Western Hemlock / Bride's-bonnet Forest   UID: ELEMENT_GLOBAL.2.687581 NatureServe Explorer   Code: CEGL000286   Scientific: Abies grandis - Tsuga heterophylla / Clintonia uniflora Forest (convergence) and Synonyms: (undetermined) Abies grandis - Tsuga heterophylla / Clintonia uniflora Forest