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Pinus ponderosa / Aspidotis densa Woodland | Western Ecology Working Group of...
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Name: Pinus ponderosa / 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. Sites are hot and dry, and occur on steep, south- or southwest-facing slopes below 1070 m elevation. Soil parent material is colluvium derived from serpentine, and may contain some basalt. Soils are very stony and gravelly, usually shallow, poorly developed and with low water-holding capacity. These patchy woodlands are dominated by trees that are widely spaced with total canopy cover often less than 30%. The evergreen, needle-leaved tree Pinus ponderosa dominates the tree canopy with occasional Pseudotsuga menziesii trees present in favorable microsites. Occasional Pinus ponderosa seedlings and saplings can be found scattered throughout the stand. Shrubs are few to absent. The herbaceous layer has moderate cover, averaging 40-45%, and is dominated by the perennial bunchgrass Pseudoroegneria spicata (20-30% cover). Common forbs include Achillea millefolium, Eriogonum compositum and Phacelia hastata. The fern, Aspidotis densa, is endemic to serpentine soils and is always present in stands of this association, and as such, is a reliable indicator species, although its cover is low.  Accession Code: VB.CC.21544.PINUSPONDEROSAA 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: Pinus ponderosa Woodland Alliance This Community's Level: Association This Community's Children: [none]		Names:   Translated: Ponderosa Pine / Indian's Dream Woodland   UID: ELEMENT_GLOBAL.2.685390 NatureServe Explorer   Code: CEGL000847   Scientific: Pinus ponderosa / Aspidotis densa Woodland   Common: Ponderosa Pine / Podfern (convergence) and Synonyms: (undetermined) Pinus ponderosa / Aspidotis densa Woodland