Name:
Celtis laevigata var. reticulata / Toxicodendron rydbergii Wet Scrub
Reference:
NatureServe Biotics 2019
Description:
This is a unique association found only in Hells Canyon, Oregon and Idaho, generally in moist areas below basalt rims on river terraces. The sites are generally up against the bottom of a basalt rim or steep rockfall, adjacent to or within a riparian area. Occurrences are found between 393 and 540 m (1290-1770 feet) elevation, on flats or moderate slopes (although the association will occasionally creep up steep, moist rockfalls and has at one site been found on a 40% slope). The tall-shrub or short-tree layer is dominated by <i>Celtis laevigata var. reticulata</i> (61% average cover). A shorter layer of shrubs is dominated by <i>Toxicodendron rydbergii</i> (20% cover), with other riparian shrubs usually found, including <i>Philadelphus lewisii, Holodiscus discolor, Sambucus nigra ssp. cerulea</i>, or occasionally <i>Cornus sericea, Symphoricarpos albus, Frangula purshiana, Crataegus douglasii, Amelanchier alnifolia</i>, and <i>Prunus virginiana</i>. The understory in these stands is quite variable, with forbs and grasses dominating. Non-native grasses and forbs (<i>Bromus tectorum, Bromus sterilis, Bromus racemosus, Anthriscus caucalis, Rubus armeniacus</i>) are important at sites with heavy grazing, while native forbs and grasses (<i>Pseudoroegneria spicata, Elymus glaucus, Viola canadensis, Artemisia ludoviciana</i>) are found in the few areas not impacted by cattle. This association is distinguished from similar types by a lack of an herbaceous understory.
Accession Code:
urn:lsid:vegbank.org:commConcept:32333-{7551C453-35DC-4AC2-BC38-CAB3B0B67A2B}
Plot-observations of this Community Concept:
0
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