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Physocarpus malvaceus - Symphoricarpos albus Shrubland | Western Ecology Working Group of...
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Name: Physocarpus malvaceus - Symphoricarpos albus Shrubland
Reference: Western Ecology Working Group of...
Description: This association is known from canyonlands of the northern Wallowa Mountains, Imnaha River, and Snake River within northeastern Oregon, southeastern Washington, and west-central Idaho. The association occurs on upper slope positions of steep, northeast- to northwest-facing canyon slopes at 1125 to 1375 m (3700-4500 feet) elevation. Deep soils on these relatively moist, shaded sites are formed from basalt colluvium. Physocarpus malvaceus is the dominant shrub species (mean cover exceeds 80%). Symphoricarpos albus is consistently present. Other associated shrub species include Amelanchier alnifolia, Prunus virginiana, and Philadelphus lewisii. Shrubs are so abundant that growth of understory forbs and graminoids is limited. This Physocarpus malvaceus association is distinguished from Pseudotsuga menziesii / Physocarpus malvaceus Forest (CEGL000447) by the absence of trees. Periodic fire may serve to maintain this deciduous shrubland vegetation by controlling the establishment of trees. 
Accession Code: VB.CC.18880.PHYSOCARPUSMALV
Plot-observations of this Community Concept: 0
      Party Perspective according to: NatureServe (organization)
Perspective from: 26-Nov-1997 to: 17-Nov-2014
      Names:   Translated: Mallow-leaf Ninebark - Common Snowberry Shrubland
  UID: ELEMENT_GLOBAL.2.684316 NatureServe ExplorerNatureServe Explorer logo
  Code: CEGL001171
  Scientific: Physocarpus malvaceus - Symphoricarpos albus Shrubland
(convergence) and Synonyms:
(undetermined) Physocarpus malvaceus - Symphoricarpos albus Shrubland