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Abies concolor - Picea breweriana / Chimaphila umbellata Forest | Western Ecology Working Group of...
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Name: Abies concolor - Picea breweriana / Chimaphila umbellata Forest Reference: Western Ecology Working Group of... Description: This highly variable coniferous forest association is found in southwestern Oregon and northwestern California between 1170-1525 m elevation. Stands grow on westerly and southwesterly aspects, on granitics, gabbro, and mixed metamorphic substrates. This association is more open than other associations in the area with large amounts (19%) of surface rock and bare ground (8%). This type is characterized by Abies concolor and Picea breweriana in the overstory with the Abies concolor attaining roughly 15% cover, and Picea breweriana about 5%. Pinus lambertiana and Pseudotsuga menziesii are both usually present in larger percentages than either of the indicator species. Total tree overstory canopy cover averages 75% cover. There seem to be two phases to this association: a warm phase and a cool phase. These phases are primarily differentiated by the tree understory species. Cooler sites contain Abies concolor, Abies X shastensis (= Abies magnifica var. shastensis), Chrysolepis chrysophylla, Picea breweriana, and Taxus brevifolia. In the warm phase Abies X shastensis is missing and Symphoricarpos mollis is found in the herbaceous layer. Mahonia nervosa (= var. nervosa) and Chimaphila umbellata are the common shrub species. Fire is not common in this association, and fires that do occur tend to be low intensity. Pinus lambertiana can be very susceptible to blister rust. This type is the only Abies concolor association with Chimaphila umbellata in the understory without Gaultheria ovatifolia.  Accession Code: VB.CC.20472.ABIESCONCOLORPI Plot-observations of this Community Concept: 0
	Party Perspective according to: NatureServe (organization) Perspective from: 26-Nov-1997 to: 17-Nov-2014
	status: accepted Community's Parent: Picea breweriana Forest Alliance This Community's Level: Association This Community's Children: [none]		Names:   Translated: White Fir - Brewer's Spruce / Pipsissewa Forest   UID: ELEMENT_GLOBAL.2.686148 NatureServe Explorer   Code: CEGL000050   Scientific: Abies concolor - Picea breweriana / Chimaphila umbellata Forest   Common: White Fir - Brewer's Spruce / Pipsissewa Forest (convergence) and Synonyms: (undetermined) Abies concolor - Picea breweriana / Chimaphila umbellata Forest