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Pseudotsuga menziesii / Aspidotis densa Woodland | Western Ecology Working Group of...
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Name: Pseudotsuga menziesii / Aspidotis densa Woodland Reference: Western Ecology Working Group of... Description: This open woodland association has been described from the eastern side of the Cascades Range, a mountainous region in the rain shadow of the Cascade crest. Stands occur on very steep, southerly slopes below 760 m elevation. Sites are outcrops of serpentine. Soil parent material is colluvium derived from serpentine, mixed with either basalt or granite. The mixed colluvium probably partially explains the presence and dominance of Pseudotsuga menziesii. Soils are very stony and gravelly, and probably unstable due to the steep slopes. The upper vegetation canopy is often patchy and is dominated by the needle-leaved, evergreen tree Pseudotsuga menziesii, with a few individuals of Pinus ponderosa. Pseudotsuga menziesii is the only tree species regenerating in the understory. Several broad-leaved, low shrubs common to low-elevation forests are present (with low cover), including Spiraea betulifolia, Mahonia aquifolium, and Prunus emarginata. The moderately dense herbaceous layer is dominated by the perennial bunchgrass Pseudoroegneria spicata (averaging 20% cover), with the forbs Balsamorhiza sagittata and Achillea millefolium contributing another 10%. Several other herbaceous species occur with patchy distribution within stands, occasionally having as much as 15% cover. The fern Aspidotis densa is endemic to serpentine soils and usually present in stands of this association, and as such, is a reliable indicator species, although its cover is low.  Accession Code: VB.CC.21338.PSEUDOTSUGAMENZ 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: Pseudotsuga menziesii Woodland Alliance This Community's Level: Association This Community's Children: [none]		Names:   Translated: Douglas-fir / Indian's Dream Woodland   UID: ELEMENT_GLOBAL.2.685358 NatureServe Explorer   Code: CEGL000896   Scientific: Pseudotsuga menziesii / Aspidotis densa Woodland   Common: Douglas-fir / Podfern (convergence) and Synonyms: (undetermined) Pseudotsuga menziesii / Aspidotis densa Woodland