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A.1301 | EcoArt 2002
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Name: A.1301
Reference: EcoArt 2002
Description: Vegetation in this alliance is found on higher alpine slopes in scattered locations in the mountains of the Pacific Northwest and in the mountains of east-central Idaho. Stands occur between 2250-2600 m of elevation on southern and western aspects of well-drained, rocky slopes. Slopes are moderate to steep. In the Cascades this alliance is restricted to the eastern side of the North Cascades where a continental climate predominates. The mean annual precipitation is 60 cm with only 15 cm of the precipitation falling in the summer. Snow accumulation is low and snowmelt is early, between April and early May. Soils are somewhat poorly developed, due to the lack of extreme weathering. Soils are derived from pyroclastic deposits, are classified as Inceptisols, and are well-drained. Stands are small and characterized by a dense cover (>100%) and a diverse flora of herbaceous and cryptogam species; 41 species is the average number per stand. ~Calamagrostis purpurascens$ is common only in stands of this alliance, where the species has a relatively high average cover of 30-50%. ~Carex scirpoidea ssp. pseudoscirpoidea (= Carex pseudoscirpoidea)$ is a common graminoid associate, and ~Minuartia obtusiloba (= Arenaria obtusiloba), Oxytropis monticola$, and ~Potentilla diversifolia var. diversifolia$ are common forb associates. A number of lichen species are often present, including ~Cornicularia aculeata, Cladonia pyxidata, Cetraria ericetorum$, and ~Cetraria islandica$. Adjacent vegetation is often ~Kobresia myosuroides$ communities. 
Accession Code: VB.CC.1073.A1301
Plot-observations of this Community Concept: 0
      Party Perspective according to: NatureServe (organization)
Perspective from: 26-Nov-1997 to: 17-Mar-2005
     
  • status: accepted
  • Community's Parent: V.A.5.N.g
  • This Community's Level: Alliance
  • This Community's Children: [none]
Names:   Scientific: CALAMAGROSTIS PURPURASCENS HERBACEOUS ALLIANCE
  Code: A.1301
  Common: Purple Reedgrass Herbaceous Alliance
(convergence) and Synonyms:
(undetermined) Calamagrostis purpurascens Herbaceous Alliance