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Pseudotsuga menziesii / Gaultheria shallon - Holodiscus discolor Forest | NatureServe Biotics 2019
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Name: Pseudotsuga menziesii / Gaultheria shallon - Holodiscus discolor Forest Reference: NatureServe Biotics 2019 Description: This association occurs from sea level to about 610 m (2000 feet) elevation in the Puget Lowland, Washington, and in the Georgia Basin of British Columbia. This is an evergreen needle-leaved forest dominated by <i>Pseudotsuga menziesii</i>; other tree species are absent or present in small amounts, <i>Pinus contorta</i> being the most frequent. The understory is dominated by a relatively continuous layer of the evergreen broad-leaved shrub <i>Gaultheria shallon</i>, typically 0.5-1 m tall. The deciduous broad-leaved <i>Holodiscus discolor</i> is usually present and forms an open layer 2-5 m tall, sometimes codominated by <i>Corylus cornuta</i>. Herbaceous species typically occupy little cover. Other frequent species include <i>Rosa gymnocarpa, Mahonia nervosa, Goodyera oblongifolia, Polystichum munitum, Festuca occidentalis, Pteridium aquilinum, Rubus ursinus</i>, and <i>Trientalis borealis ssp. latifolia</i>. This association occurs on dry, nutrient-poor sites, with soils that are shallow to bedrock or very coarse and deep glacial outwash. It tends to occur on upper slopes or south to west aspects. This association is distinguished from similar ones by &gt;10% cover of <i>Gaultheria shallon</i>, and &gt;5% cover of <i>Holodiscus discolor, Corylus cornuta</i>, or <i>Vaccinium ovatum</i>, combined with &lt;10% cover of <i>Tsuga heterophylla, Thuja plicata</i>, and <i>Abies grandis</i>, &lt;20% cover of <i>Arbutus menziesii</i>, and &lt;5% cover of <i>Polystichum munitum</i>.  Accession Code: urn:lsid:vegbank.org:commConcept:34290-{9FFAF404-DC89-4D8A-AD7D-4ABD48465958} Plot-observations of this Community Concept: 0
	Party Perspective according to: NatureServe (organization) Perspective from: 12-Jun-2015 to: ongoing
	status: accepted Community's Parent: Tsuga heterophylla - Pseudotsuga menziesii / Holodiscus discolor Dry Forest Alliance This Community's Level: Association This Community's Children: [none]		Names:   UID: ELEMENT_GLOBAL.2.942445 NatureServe Explorer   Code: CEGL005531   Translated: Douglas-fir / Salal - Oceanspray Forest   Scientific: Pseudotsuga menziesii / Gaultheria shallon - Holodiscus discolor Forest