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Alnus (incana, viridis ssp. sinuata) / Lysichiton americanus - Oenanthe sarmentosa Shrub Swamp | NatureServe Biotics 2019
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Name: Alnus (incana, viridis ssp. sinuata) / Lysichiton americanus - Oenanthe sarmentosa Shrub Swamp Reference: NatureServe Biotics 2019 Description: This wetland association occurs only in a limited area of the central Puget Lowlands of Washington. It occurs along low-gradient or partially impounded stream systems or in impounded wetlands. Sites are seasonally flooded to permanently flooded with significant water-level fluctuation. Soils are composed of peat and muck. The deciduous tall-shrub canopy is dominated by either <i>Alnus incana</i> or <i>Alnus viridis ssp. sinuata</i>, apparently the latter more frequently. Other tall shrubs usually present are <i>Salix</i> spp. and <i>Frangula purshiana</i>, either of which can be locally codominant. The understory is usually codominated by <i>Lysichiton americanus</i> and one or more of the following graminoids: <i>Carex utriculata, Carex aquatilis var. dives, Carex obnupta, Carex cusickii</i>, and <i>Calamagrostis canadensis</i>. <i>Oenanthe sarmentosa</i> is almost always present. The combination of dominance of <i>Alnus incana</i> or <i>Alnus viridis ssp. sinuata</i> in the canopy with <i>Lysichiton americanus</i> and <i>Oenanthe sarmentosa</i> appears to be diagnostic.  Accession Code: urn:lsid:vegbank.org:commConcept:32176-{8CBD3F54-0297-4488-AAF6-CC6A8E32713B} Plot-observations of this Community Concept: 0
	Party Perspective according to: NatureServe (organization) Perspective from: 17-Oct-2002 to: ongoing
	status: accepted Community's Parent: Acer macrophyllum - Alnus rubra Riparian Forest Alliance This Community's Level: Association This Community's Children: [none]		Names:   UID: ELEMENT_GLOBAL.2.683875 NatureServe Explorer   Code: CEGL003293   Translated: (Gray Alder, Sitka Alder) / Yellow Skunk-cabbage - Water Parsley Shrub Swamp   Scientific: Alnus (incana, viridis ssp. sinuata) / Lysichiton americanus - Oenanthe sarmentosa Shrub Swamp (convergence) and Synonyms: (similar) CEGL003293 (similar) Alnus (incana, viridis ssp. sinuata) / Lysichiton americanus - Oenanthe sarmentosa Shrubland (similar) Alnus (incana, viridis ssp. sinuata) / Lysichiton americanus - Oenanthe sarmentosa Shrubland