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Alnus rubra / Oxalis (oregana, trilliifolia) Riparian Forest | NatureServe Biotics 2019
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Name: Alnus rubra / Oxalis (oregana, trilliifolia) Riparian Forest Reference: NatureServe Biotics 2019 Description: This association occurs in the southern Cascade foothills of Washington, including Mount Rainier and on the Olympic Peninsula, on relatively well-drained soils at lower elevations on riparian terraces, streambanks or floodplains. The canopy is dominated by <i>Alnus rubra</i>. <i>Picea sitchensis</i> or <i>Tsuga heterophylla</i> are frequently in the overstory but with low cover. When present, the tall-shrub layer is dominated by <i>Acer circinatum</i>. <i>Rubus spectabilis</i> or <i>Ribes bracteosum</i> may be present but under 20% cover in aggregate. The understory is dominated by <i>Oxalis oregana</i> or <i>Oxalis trilliifolia</i>. <i>Polystichum munitum</i> can be codominant or dominant in the herb layer. Many other forbs and ferns, including <i>Athyrium filix-femina, Luzula fastigiata, Luzula parviflora, Tiarella trifoliata, Circaea alpina</i>, and <i>Tolmiea menziesii</i>, are frequently present to prominent. Grasses, such as <i>Elymus glaucus</i> and <i>Elymus hirsutus</i>, are present to codominant but never dominant or more abundant in aggregate than <i>Oxalis</i> spp.  Accession Code: urn:lsid:vegbank.org:commConcept:32282-{F0E268BB-D2E4-474E-9C5F-DF9E3B1990F5} Plot-observations of this Community Concept: 0
	Party Perspective according to: NatureServe (organization) Perspective from: 17-Jan-2016 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.2.688876 NatureServe Explorer   Code: CEGL003400   Translated: Red Alder / (Redwood Sorrel, Threeleaf Woodsorrel) Riparian Forest   Scientific: Alnus rubra / Oxalis (oregana, trilliifolia) Riparian Forest (convergence) and Synonyms: (similar) Alnus rubra / Oxalis (oregana, trilliifolia) Forest (similar) Alnus rubra / Oxalis (oregana, trilliifolia) Forest (similar) CEGL003400