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Abies grandis - Tsuga heterophylla / Clintonia uniflora Forest | NatureServe Biotics 2019
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Name: Abies grandis - Tsuga heterophylla / Clintonia uniflora Forest
Reference: NatureServe Biotics 2019
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 <i>Abies grandis</i> and <i>Pseudotsuga menziesii</i> with substantial (up to 20%) cover of <i>Tsuga heterophylla</i>. Additional conifers present in the overstory may include <i>Thuja plicata, Taxus brevifolia, Larix occidentalis</i>, and/or <i>Pinus ponderosa</i>. The shrub layer is characterized by dense patches of <i>Mahonia nervosa, Acer circinatum</i> and <i>Rosa gymnocarpa</i>. <i>Symphoricarpos mollis</i> 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: <i>Linnaea borealis, Achlys triphylla, Maianthemum stellatum, Viola glabella, Viola sempervirens</i>, and <i>Clintonia uniflora</i>. 
Accession Code: urn:lsid:vegbank.org:commConcept:29195-{4153F169-1E36-47B8-B37E-12994CCEA037}
Plot-observations of this Community Concept: 0
      Party Perspective according to: NatureServe (organization)
Perspective from: 26-Nov-1997 to: ongoing
      Names:   UID: ELEMENT_GLOBAL.2.687581 NatureServe ExplorerNatureServe Explorer logo
  Code: CEGL000286
  Translated: Grand Fir - Western Hemlock / Bride's Bonnet Forest
  Scientific: Abies grandis - Tsuga heterophylla / Clintonia uniflora Forest
(convergence) and Synonyms:
(similar) CEGL000286
(similar) Abies grandis - Tsuga heterophylla / Clintonia uniflora Forest
(similar) Abies grandis - Tsuga heterophylla / Clintonia uniflora Forest