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Sequoia sempervirens - Pseudotsuga menziesii Forest Alliance | Western Ecology Working Group of...
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Name: Sequoia sempervirens - Pseudotsuga menziesii Forest Alliance Reference: Western Ecology Working Group of... Description: These giant mixed-conifer forests are restricted to the coastal fog belt in the extreme southwestern part of Oregon and northern California, with scattered sites south to the central coast. Elevations are below 500 m in elevation in Oregon and 900 m in California. Stands occupy steep slopes and ridges of coastal mountains on any aspect. In southwestern Oregon they also occur on moist toeslopes and valleys. These stands generally occur in the upper part of the coastal fog belt, inland of the very wet coastal stands of nearly pure Sequoia sempervirens. Soils are shallow and well-drained. These giant conifer forests are found in the coastal fog zone of southwestern Oregon and northwestern California. The canopy of these forests is dominated by Pseudotsuga menziesii and Sequoia sempervirens trees that often exceed 60 m in height. There is almost always a subcanopy of Lithocarpus densiflorus, usually between 10-30 m tall, occasionally codominant with Umbellularia californica. Lithocarpus densiflorus (1-70%) also dominates the shrub layer with both Rhododendron macrophyllum (2-60%) and Vaccinium ovatum (10-70%). Gaultheria shallon and Mahonia nervosa are common, and in moist pockets Polystichum munitum and Oxalis oregana can be found. In wetter northern stands, Polystichum munitum, Oxalis oregana, and Clintonia andrewsiana dominate the herbaceous layer. Other forbs include Lotus crassifolius, Arnica cordifolia, and Xerophyllum tenax.  Accession Code: VB.CC.20033.SEQUOIASEMPERVI Plot-observations of this Community Concept: 0
	Party Perspective according to: NatureServe (organization) Perspective from: 26-Nov-1997 to: 01-May-2019
	status: accepted This Community's Level: Alliance This Community's Children: [none]		Names:   Scientific: Sequoia sempervirens - Pseudotsuga menziesii Forest Alliance   Translated: Redwood - Douglas-fir Forest Alliance   UID: HIGHER_CLASS_UNIT.2.124903 NatureServe Explorer   Code: A.109