Name:
Rhamnus alnifolia Riparian Wet Shrubland
Reference:
NatureServe Biotics 2019
Description:
This association is known from the Blue Mountains of northeastern Oregon, scattered locations in moist mountainous regions of Idaho, Montana, and in western Wyoming. Stands of this <i>Rhamnus alnifolia</i> association occur at low to mid elevations (e.g., up to 2074 m [6800 feet]) in seeps, along sloped spring-fed creeks, on alluvial terraces of small streams (orders 1 and 2), and in broad basins or fens. Soils are typically loams and contain coarse rock fragments. Soils often show signs of a seasonally high water table (e.g., mottling), but the association also occurs on semipermanently saturated sites. Nearly complete cover of <i>Rhamnus alnifolia</i> characterizes this association, with few associates having consistently high cover due to the dense canopy. Associated shrubs that may be present include <i>Alnus incana, Lonicera involucrata, Ribes</i> spp., <i>Salix geyeriana</i>, and <i>Symphoricarpos albus</i>. The herbaceous understory is diverse, but most species have low to moderate cover. Common graminoid species include <i>Bromus</i> spp., <i>Calamagrostis canadensis, Cinna latifolia, Elymus glaucus</i>, and <i>Glyceria</i> spp. Tall forbs are characteristically present, including <i>Heracleum maximum, Mertensia</i> spp., <i>Thalictrum occidentale</i>, and <i>Urtica dioica</i>, but no single species has high cover and constancy throughout the association's range.
Accession Code:
urn:lsid:vegbank.org:commConcept:30041-{9D042090-9F1A-48BF-A0D7-EA880B8DD0A0}
Plot-observations of this Community Concept:
0
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