Name:
Pseudotsuga menziesii - Pinus ponderosa / Moss Western North American Cliff, Scree & Rock Vegetation Macrogroup
Reference:
NatureServe Biotics 2019
Description:
This type is found throughout temperate and boreal western North America and consists of sparsely vegetated rock outcrops and cliff faces found on the Alaska peninsula, Aleutian Islands, Alaskan boreal region, Coast Mountains of British Columbia, the Rocky Mountain Cordillera, Cascades, Sierra Nevada and other ranges tall enough to have a temperate or boreal climate. The vegetation is highly variable and is typically sparse cover of vascular species with sparse to dense cover of lichens, mosses or other nonvascular organisms. Characteristic species include trees from the surrounding landscape, such as <i>Abies concolor, Abies lasiocarpa, Abies magnifica, Pinus albicaulis, Pinus contorta, Pinus flexilis, Pinus monticola, Pinus ponderosa, Pseudotsuga menziesii</i> (not in Alaska), <i>Populus tremuloides, Tsuga mertensiana</i>, or <i>Pinus edulis, Pinus monophylla, Juniperus</i> spp., and <i>Cercocarpus ledifolius</i> at lower elevations. Common shrubs species may include <i>Amelanchier alnifolia, Arctostaphylos nevadensis, Holodiscus</i> spp., <i>Jamesia americana, Juniperus communis, Ledum glandulosum, Mahonia repens, Physocarpus</i> spp., <i>Ribes</i> spp., <i>Rosa woodsii</i>, or <i>Rhus trilobata</i>. Potential herbaceous species are numerous and may include sparse cover of <i>Aspidotis densa, Festuca viridula, Poa curtifolia</i>, and <i>Pseudoroegneria spicata</i>. Characteristic nonvascular species information is not available. Stands occur on moderate to steep slopes, cliff faces, narrow canyons, and rock outcrops. In general these are the dry, sparsely vegetated sites. Substrates are often unstable scree and talus that typically occur below cliff faces.
Accession Code:
urn:lsid:vegbank.org:commConcept:41105-{346CA606-D4CA-4A55-8DD4-09D83AAAE4D1}
Plot-observations of this Community Concept:
0
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