Name:
Thuja plicata - Tsuga heterophylla / Whipplea modesta Forest
Reference:
Western Ecology Working Group of...
Description:
Pseudotsuga menziesii is the dominant tree species, usually with about 50% canopy cover. Thuja plicata and Tsuga heterophylla are common in the overstory, but stands of this association may contain neither of these two species. Thuja plicata, Tsuga heterophylla, Pseudotsuga menziesii, and Acer macrophyllum are common in the regeneration layer. Abies concolor, Calocedrus decurrens, and Taxus brevifolia are also common in the understory. Acer circinatum, Whipplea modesta, Gaultheria shallon, and Rosa gymnocarpa are the dominant shrubs. Other common shrubs include Mahonia nervosa (= Berberis nervosa), Rubus ursinus, Symphoricarpos mollis, and Vaccinium virgatum (= Vaccinium parviflorum). Common herbaceous species include Achlys triphylla, Anemone deltoidea, Prosartes hookeri (= Disporum hookeri), Goodyera oblongifolia, Linnaea borealis, and Trillium ovatum, usually at low cover. This association is characteristically found on primarily eastern aspects, on the upper to middle third of the slope, and occasionally on the lower third. Parent material is commonly andesite or basalt and occasionally tephra that has been redeposited by wind and water. The environment is mild, evapotranspirational demand is low, summer temperatures are warm, not hot, and moisture stress is low. Soils are rarely frozen. Elevation ranges from 2250-3250 feet.
Accession Code:
VB.CC.22178.THUJAPLICATATSU
Plot-observations of this Community Concept:
0
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