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Picea sitchensis - Tsuga heterophylla / Polystichum munitum - Oxalis oregana Forest | NatureServe Biotics 2019
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Name: Picea sitchensis - Tsuga heterophylla / Polystichum munitum - Oxalis oregana Forest Reference: NatureServe Biotics 2019 Description: This Sitka spruce forest occurs in Washington and Oregon. <i>Picea sitchensis</i> usually dominates the canopy or codominates with <i>Tsuga heterophylla</i>. <i>Acer macrophyllum</i> or <i>Alnus rubra</i> are sometimes prominent to codominant. Tree regeneration is dominated by <i>Tsuga heterophylla</i> and/or <i>Picea sitchensis</i>. The shrub layer is variable in abundance. When well-developed (mainly in major river valleys), it is dominated by the tall shrub <i>Acer circinatum</i>. <i>Rubus spectabilis, Vaccinium alaskaense</i>, and <i>Vaccinium parvifolium</i> are usually present in small amounts, though the former can be prominent. The well-developed herb layer is codominated by <i>Polystichum munitum</i> and <i>Oxalis oregana</i>. <i>Athyrium filix-femina, Blechnum spicant</i>, and <i>Tiarella trifoliata</i> are usually present. <i>Tiarella trifoliata</i> or <i>Achlys californica</i> and/or <i>Achlys triphylla</i> can be abundant. On the western Olympic Peninsula, this association occurs at low elevations. Sites are relatively moist but not wet, with well-drained soils. Most often it is located on lower or toeslopes or riparian terraces. It is very extensive on high terraces of major rivers. This association occurs in a limited range within Washington where much of it has been altered by forest harvesting. Recovery is expected within 100 years from time of stand-replacement disturbances, if sites are not planted with Douglas-fir as they often are.  Accession Code: urn:lsid:vegbank.org:commConcept:34289-{B77683A0-F8C5-493B-AA4B-7DB125818E5E} Plot-observations of this Community Concept: 0
	Party Perspective according to: NatureServe (organization) Perspective from: 10-May-2016 to: ongoing
	status: accepted Community's Parent: Tsuga heterophylla - Thuja plicata / Blechnum spicant Rich Mesic Forest Alliance This Community's Level: Association This Community's Children: [none]		Names:   UID: ELEMENT_GLOBAL.2.942444 NatureServe Explorer   Code: CEGL005530   Translated: Sitka Spruce - Western Hemlock / Western Swordfern - Redwood Sorrel Forest   Scientific: Picea sitchensis - Tsuga heterophylla / Polystichum munitum - Oxalis oregana Forest