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Pinus ponderosa / Aspidotis densa Woodland | NatureServe Biotics 2019
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Name: Pinus ponderosa / Aspidotis densa Woodland
Reference: NatureServe Biotics 2019
Description: This open woodland association has been described from the eastern side of the Cascade Range, a mountainous region in the rainshadow 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 <i>Pinus ponderosa</i> dominates the tree canopy with occasional <i>Pseudotsuga menziesii</i> trees present in favorable microsites. Occasional <i>Pinus ponderosa</i> 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 <i>Pseudoroegneria spicata</i> (20-30% cover). Common forbs include <i>Achillea millefolium, Eriogonum compositum</i>, and <i>Phacelia hastata</i>. The fern <i>Aspidotis densa</i> 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: urn:lsid:vegbank.org:commConcept:29756-{D5DEC372-60AF-40DF-B5FF-A1F7FC01097F}
Plot-observations of this Community Concept: 0
      Party Perspective according to: NatureServe (organization)
Perspective from: 21-Jun-1993 to: ongoing
      Names:   UID: ELEMENT_GLOBAL.2.685390 NatureServe ExplorerNatureServe Explorer logo
  Code: CEGL000847
  Translated: Ponderosa Pine / Indian's Dream Woodland
  Scientific: Pinus ponderosa / Aspidotis densa Woodland
(convergence) and Synonyms:
(similar) CEGL000847
(similar) Pinus ponderosa / Aspidotis densa Woodland
(similar) Pinus ponderosa / Aspidotis densa Woodland