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Pseudotsuga menziesii - Tsuga heterophylla / Mahonia nervosa Forest | NatureServe Biotics 2019
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Name: Pseudotsuga menziesii - Tsuga heterophylla / Mahonia nervosa Forest Reference: NatureServe Biotics 2019 Description: This Douglas-fir - western hemlock forest occurs in Washington and Oregon and possibly British Columbia. The typically closed canopy is dominated by <i>Pseudotsuga menziesii</i> or codominated by that species and <i>Tsuga heterophylla</i>. <i>Tsuga heterophylla</i> typically dominates tree regeneration and always occupies over 10% total cover. This type includes stands with earlier-seral trees, such as <i>Pinus contorta</i>. The shrub layer varies from sparse to dense. <i>Mahonia nervosa</i> is always present and typically prominent to dominant. <i>Acer circinatum</i> is often present to dominant in a well-developed tall-shrub layer. <i>Vaccinium parvifolium</i> or <i>Paxistima myrsinites</i> are usually present. The herb layer is usually poorly developed with shade-tolerant species such as <i>Chimaphila umbellata</i> and <i>Goodyera oblongifolia</i> usually present. <i>Polystichum munitum</i> and <i>Linnaea borealis</i> are frequently present, the former always with under 3% cover. This association occurs in the northern and eastern Olympics and in the Cascade Range at low to middle elevations. Sites have well-drained, often shallow soils and are located on steep mid to upper slopes and ridgetops. This association occurs on dry topographic positions.  Accession Code: urn:lsid:vegbank.org:commConcept:34300-{E76401AA-F379-4788-B7C0-D302D39410FD} Plot-observations of this Community Concept: 0
	Party Perspective according to: NatureServe (organization) Perspective from: 11-May-2016 to: ongoing
	status: accepted Community's Parent: Tsuga heterophylla - Pseudotsuga menziesii / Cornus unalaschkensis Mesic Forest Alliance This Community's Level: Association This Community's Children: [none]		Names:   UID: ELEMENT_GLOBAL.2.942452 NatureServe Explorer   Code: CEGL005541   Translated: Douglas-fir - Western Hemlock / Cascade Barberry Forest   Scientific: Pseudotsuga menziesii - Tsuga heterophylla / Mahonia nervosa Forest