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Pseudotsuga menziesii - Abies grandis / Symphoricarpos albus / Melica subulata Forest | Western Ecology Working Group of...
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Name: Pseudotsuga menziesii - Abies grandis / Symphoricarpos albus / Melica subulata Forest Reference: Western Ecology Working Group of... Description: This forest association occurs only near sea level in a small area of the northeastern Olympic Peninsula and the San Juan Islands, Washington, and possibly in adjacent British Columbia. Stands occur on slightly dry to mesic sites that are not too steep, in the driest climatic region in western Washington where annual precipitation averages 18-29 inches. These forest patches typically occur near or directly adjacent to prairies or extensive herbaceous bald areas where pre-settlement fires were frequent, indicating that this type is likely a relict of indigenous burning practices. This evergreen needle-leaved forest is dominated by <i>Pseudotsuga menziesii</i> and codominated by <i>Abies grandis</i>. Tree regeneration is dominated by <i>Abies grandis</i>. The understory has a variable deciduous broad-leaved shrub layer typically dominated by <i>Symphoricarpos albus</i> and/or <i>Holodiscus discolor</i>, with <i>Rosa gymnocarpa</i> prominent and the evergreen dwarf-shrub <i>Mahonia nervosa</i> occasionally codominant at lower levels. The grasses <i>Melica subulata</i> and <i>Festuca occidentalis</i> are usually present and average 5-10% cover each. The evergreen fern <i>Polystichum munitum</i> is almost always present and usually common (mean 7% cover). Other high frequency understory species are <i>Festuca subuliflora, Galium aparine, Galium triflorum, Goodyera oblongifolia, Osmorhiza berteroi (= Osmorhiza chilensis), Pteridium aquilinum, Trientalis borealis ssp. latifolia (= Trientalis latifolia), Rubus ursinus</i>, and <i>Lonicera ciliosa</i>. This association is distinguished from similar ones by >10% cover of either <i>Symphoricarpos albus</i> or <i>Holodiscus discolor</i>, >10% cover of <i>Abies grandis</i>, combined with <10% cover of <i>Tsuga heterophylla, Thuja plicata</i>, and <i>Gaultheria shallon</i>, and <25% cover of <i>Polystichum munitum</i>.  Accession Code: VB.CC.32681.CEGL003350 Plot-observations of this Community Concept: 0
	Party Perspective according to: NatureServe (organization) Perspective from: 17-Nov-2014 to: 01-May-2019
	status: accepted This Community's Level: association This Community's Children: [none]		Names:   UID: ELEMENT_GLOBAL.2.687119 NatureServe Explorer   Translated: Douglas-fir - Grand Fir / Common Snowberry / Alaska Oniongrass Forest   Scientific: Pseudotsuga menziesii - Abies grandis / Symphoricarpos albus / Melica subulata Forest   Code: CEGL003350