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Celtis laevigata var. reticulata / Philadelphus lewisii Wet Scrub Alliance | NatureServe Biotics 2019
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Name: Celtis laevigata var. reticulata / Philadelphus lewisii Wet Scrub Alliance Reference: NatureServe Biotics 2019 Description: The upper canopy of this scrub woodland and shrubland alliance is dominated by <i>Celtis laevigata var. reticulata</i> and/or <i>Philadelphus lewisii</i>, often forming dense thickets. <i>Celtis laevigata var. reticulata</i> occurs either as a short tree or tall shrub between 3-6 m in height. <i>Philadelphus lewisii</i> occurs as a tall shrub between 2-5 m in height. The short-shrub layer often contains <i>Rosa woodsii, Rosa nutkana</i>, or <i>Sambucus nigra ssp. cerulea</i> with other riparian shrubs such as <i>Holodiscus discolor</i> or occasionally <i>Symphoricarpos albus</i> and <i>Toxicodendron rydbergii</i> on moist sites. If present, the herbaceous layer may be dominated by the perennial bunchgrass <i>Pseudoroegneria spicata</i>. <i>Poa secunda</i> and <i>Aristida purpurea var. longiseta</i> are often present also. This alliance is found in the lower montane and foothill regions around the Columbia Basin, and north and east into the Central Rockies in Idaho and northwestern Wyoming, and south into canyons in the Colorado Plateau and in riparian areas in the southeastern Colorado plains. Stands occur as numerous relatively small stands, dispersed and clustered in valley bottoms along riparian margins, on lower slopes of river terraces near seepage lines, and on scree slopes. It can also occur in the active floodplain of intermittent streams and deep canyon bottoms of the Snake and Salmon rivers. Elevations range from 250-550 m in the Columbia Basin and 1400-1700 m in Colorado. Although sites are predominately on hot, dry southeastern to southwestern aspects, these trees access additional soil moisture that accumulates at the base of the colluvial slopes, or are riparian. Soils are poorly developed, well-drained alluvial or colluvial sands that often have a high percentage of rock fragments.  Accession Code: urn:lsid:vegbank.org:commConcept:39183-{E36C6CA9-DA53-4C06-9830-A190044CA822} Plot-observations of this Community Concept: 0
	Party Perspective according to: NatureServe (organization) Perspective from: 14-Mar-2014 to: ongoing
	status: accepted Community's Parent: Salix spp. - Alnus spp. - Betula occidentalis Riparian & Seep Shrubland Group This Community's Level: Alliance This Community's Children: Show/Hide   Celtis laevigata var. reticulata / Philadelphus lewisii Wet Scrub   Celtis laevigata var. reticulata / Pseudoroegneria spicata Wet Scrub   Celtis laevigata var. reticulata / Toxicodendron rydbergii Wet Scrub   Philadelphus lewisii / Symphoricarpos albus Wet Shrubland   Philadelphus lewisii Wet Shrubland		Names:   UID: ELEMENT_GLOBAL.2.900024 NatureServe Explorer   Code: A3973   Translated: Netleaf Hackberry / Lewis' Mock Orange Wet Scrub Alliance   Common: Valley Bottom Netleaf Hackberry / Lewis' Mock Orange Wet Scrub   Scientific: Celtis laevigata var. reticulata / Philadelphus lewisii Wet Scrub Alliance