Name:
Populus tremuloides / Shepherdia canadensis Forest
Reference:
Western Ecology Working Group of...
Description:
This association occurs in eastern Idaho, western Wyoming, and central Colorado. It occurs between 2092 and 2400 m (6863-8000 feet) in elevation in Idaho and Wyoming. In Colorado, stands occur between 2774 and 3078 m (9100-10,100 feet), on dry ridges, and is considered one of the driest aspen types. Stands occur on low to mid positions on steep slopes, or on near-flat terraces. This association is distinguished by the prominence of Shepherdia canadensis in the shrub layer, below a mostly Populus tremuloides overstory. Few conifers, such as Abies lasiocarpa, Picea engelmannii or Pinus contorta, are frequently present in small amounts. The shrub layer may have other shrubs such as Amelanchier alnifolia, Rosa woodsii, Symphoricarpos oreophilus, Arctostaphylos uva-ursi, and Paxistima myrsinites, any of which may not be present at all to locally abundant with the ever present and abundant Shepherdia canadensis. The herbaceous layer is composed of a mix of graminoids and forbs, the latter often more abundant. Typical (but not consistent) graminoid species include Elymus trachycaulus (= Agropyron trachycaulum), Bromus ciliatus, Poa pratensis, and Phleum pratense. Forbs usually present (but no one species consistently so) include Geranium viscosissimum, Lupinus argenteus, Thalictrum fendleri, Osmorhiza berteroi (= Osmorhiza chilensis), Fragaria vesca, Taraxacum sp., Trifolium sp., Potentilla gracilis, Galium boreale, Perideridia gairdneri, and Achillea millefolium.
Accession Code:
VB.CC.22912.POPULUSTREMULOI
Plot-observations of this Community Concept:
0
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