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Pinus flexilis - Populus tremuloides Forest Alliance | Western Ecology Working Group of...
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Name: Pinus flexilis - Populus tremuloides Forest Alliance Reference: Western Ecology Working Group of... 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.24261.PINUSFLEXILISPO Plot-observations of this Community Concept: 0
	Party Perspective according to: NatureServe (organization) Perspective from: 26-Nov-1997 to: 01-May-2019
	status: accepted This Community's Level: Alliance This Community's Children: [none]		Names:   Scientific: Pinus flexilis - Populus tremuloides Forest Alliance   Translated: Limber Pine - Quaking Aspen Forest Alliance   UID: HIGHER_CLASS_UNIT.2.125731 NatureServe Explorer   Code: A.425