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A.1292 | EcoArt 2002
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Name: A.1292
Reference: EcoArt 2002
Description: The bunchgrass ~Achnatherum lemmonii (= Stipa lemmonii)$ and the moss ~Racomitrium canescens$ dominate this alliance, found on hilltop balds along valley margins of the Willamette Valley, Oregon. Cover values are not available, but frequencies in 0.01-square-meter plots show ~Achnatherum$ from 15-56% and ~Racomitrium$ from 74-100%. Other native bunch grasses include ~Festuca idahoensis$ and ~Koeleria macrantha$. ~Quercus garryana$ trees are usually found on the margins of this type, but most areas are too shallow-soiled to support much tree or shrub growth. ~Toxicodendron diversilobum$ is found under the isolated trees and on the margins of these grasslands. Native forbs from this grass bald include ~Trifolium microcephalum, Viola douglasii, Lotus micranthus, Allium amplectens$, and ~Eriogonum nudum$. Exotic grasses which have invaded most stands include ~Aira caryophyllea, Bromus hordeaceus (= Bromus mollis), Bromus rigidus, Cynosurus echinatus, Holcus lanatus$, and ~Arrhenatherum elatius$. 
Accession Code: VB.CC.1062.A1292
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.f
  • This Community's Level: Alliance
  • This Community's Children: [none]
Names:   Scientific: ACHNATHERUM LEMMONII HERBACEOUS ALLIANCE
  Code: A.1292
  Common: Lemmon's Needlegrass Herbaceous Alliance
(convergence) and Synonyms:
(undetermined) Achnatherum lemmonii Herbaceous Alliance