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Celtis laevigata var. reticulata / Toxicodendron rydbergii Woodland | Western Ecology Working Group of...
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Name: Celtis laevigata var. reticulata / Toxicodendron rydbergii Woodland Reference: Western Ecology Working Group of... 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 (= Rhus radicans)</i> (20% cover), with other riparian shrubs usually found, including <i>Philadelphus lewisii, Holodiscus discolor, Sambucus caerulea</i>, or occasionally <i>Cornus sericea, Symphoricarpos albus, Frangula purshiana (= Rhamnus 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 commutatus, Anthriscus caucalis, Rubus discolor</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: VB.CC.33695.CEGL003451 Plot-observations of this Community Concept: 0
	Party Perspective according to: NatureServe (organization) Perspective from: 17-Nov-2014 to: 01-May-2019
	status: accepted This Community's Level: association This Community's Children: [none]		Names:   UID: ELEMENT_GLOBAL.2.686272 NatureServe Explorer   Translated: Netleaf Hackberry / Western Poison-ivy Woodland   Scientific: Celtis laevigata var. reticulata / Toxicodendron rydbergii Woodland   Code: CEGL003451