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A.425 | EcoArt 2002
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Name: A.425
Reference: EcoArt 2002
Description: This mixed evergreen-deciduous forest alliance occurs locally on montane and subalpine slopes in the mountains and plateaus in western Wyoming, Utah, and eastern Nevada. Soils are derived from colluvium and residuum from a variety of parent materials. Forests included in this alliance are characterized by an open to moderately closed, mixed evergreen-deciduous tree canopy that is codominated by ~Populus tremuloides$ and ~Pinus flexilis$. Several other species of conifers may be scattered within the stands including ~Abies concolor, Picea engelmannii$, and ~Pseudotsuga menziesii$. Younger stands typically have dense ~Populus tremuloides$ with ~Pinus flexilis$ mixed in. As the stands age, ~Populus tremuloides$ cover is slowly reduced, and ~Pinus flexilis$ becomes more dominant, but it is unlikely that it would completely suppress ~Populus tremuloides$ because of the relatively open tree canopy. The sparse to moderately dense understory may include short-shrub and herbaceous layers. Shrub associates may include ~Arctostaphylos patula, Symphoricarpos oreophilus, Juniperus communis, Rosa woodsii$, or ~Mahonia repens$. The herbaceous layer is composed of a mixture of graminoids and forbs. Associated species may include ~Bromus anomalus, Carex rossii, Elymus glaucus, Elymus trachycaulus, Melica spectabilis, Poa fendleriana$; ~Achillea millefolium, Arnica cordifolia, Astragalus miser, Geranium viscosissimum, Ligusticum filicinum, Pseudostellaria jamesiana (= Stellaria jamesiana), Thalictrum fendleri$, and ~Trifolium gymnocarpon$. Annuals are typically uncommon. Diagnostic of this forest alliance is the tree canopy codominated by~Pinus flexilis$ and~Populus tremuloides$. 
Accession Code: VB.CC.2089.A425
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: I.C.3.N.a
  • This Community's Level: Alliance
  • This Community's Children: [none]
Names:   Scientific: PINUS FLEXILIS - POPULUS TREMULOIDES FOREST ALLIANCE
  Common: Limber Pine - Quaking Aspen Forest Alliance
  Code: A.425
(convergence) and Synonyms:
(undetermined) Pinus flexilis - Populus tremuloides Forest Alliance