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Cupressus macnabiana Forest Alliance | Western Ecology Working Group of...
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Name: Cupressus macnabiana Forest Alliance Reference: Western Ecology Working Group of... Description: Stands of the Cupressus macnabiana Forest Alliance (A.115) occur from 300-800 m elevation in the northern Sierra Nevada and southern Cascade Mountains, and in the eastern portion of the Siskiyous. The climate of this region is Mediterranean, with a distinct summer dry season and with most precipitation falling as rain in the fall and winter. The yearly precipitation varies widely from 30-80 cm. Sites supporting this alliance are usually on upper slopes and are underlain by a variety of substrates, including basalt, conglomerates, gabbro, greenstone, and ultramafic serpentine. The soils are rocky, and range from deep, clay loams to shallow, silty loams only a few cm deep. All these soils are infertile. This alliance is characterized by Cupressus macnabiana as the sole or dominant shrub or tree in the canopy. Several other conifers may occur including Pinus attenuata, Pinus sabiniana, and Cupressus sargentii. Broad-leaved trees, such as Quercus douglasii or Quercus wislizeni, may also be present. Shrubs may be present and could include Ceanothus cuneatus, Arctostaphylos viscida, Eriodictyon californicum, and, on serpentine outcrops, Quercus durata, Ceanothus jepsonii, and Garrya congdonii (= Garrya flavescens ssp. congdonii). The herbaceous layer is sparse.  Accession Code: VB.CC.25907.CUPRESSUSMACNAB 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: Cupressus macnabiana Forest Alliance   Translated: McNab Cypress Forest Alliance   UID: HIGHER_CLASS_UNIT.2.125192 NatureServe Explorer   Code: A.115