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Alnus rubra - Fraxinus latifolia / Lysichiton americanus Swamp Woodland Alliance | NatureServe Biotics 2019
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Name: Alnus rubra - Fraxinus latifolia / Lysichiton americanus Swamp Woodland Alliance
Reference: NatureServe Biotics 2019
Description: This alliance occurs throughout the northern Puget Trough lowlands of Washington and British Columbia and in low-lying valleys of the western Oregon and northern California coasts. Forests are dominated by <i>Alnus rubra, Fraxinus latifolia</i>, or <i>Populus balsamifera ssp. trichocarpa</i> which are well-adapted to wet soil conditions. Overstory cover ranges from 40-80%. The forest undergrowth is usually dominated by a deciduous shrub layer with <i>Rubus spectabilis, Crataegus douglasii, Spiraea douglasii, Symphoricarpos albus, Rosa rubiginosa</i>, or <i>Rubus ursinus</i>. The herbaceous layer may be well-developed. Deciduous swamps typically occur along low-elevation (0-1000 m) valley bottoms, along the upland margins of wetlands, or poorly aerated sections of floodplains. Soils are seasonally flooded by spring snowmelt and/or winter rains, which can last well into early summer. 
Accession Code: urn:lsid:vegbank.org:commConcept:38967-{0EAA9691-4FC6-48C9-849C-290EC510F6D4}
Plot-observations of this Community Concept: 0
      Party Perspective according to: NatureServe (organization)
Perspective from: 08-Jan-2014 to: ongoing
      Names:   UID: ELEMENT_GLOBAL.2.899805 NatureServe ExplorerNatureServe Explorer logo
  Code: A3753
  Translated: Red Alder - Oregon Ash / American Skunk-cabbage Swamp Woodland Alliance
  Common: Pacific Northwest Alder - Ash Swamp Woodland
  Scientific: Alnus rubra - Fraxinus latifolia / Lysichiton americanus Swamp Woodland Alliance