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Pinus jeffreyi / Ceanothus cordulatus Woodland | NatureServe Biotics 2019
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Name: Pinus jeffreyi / Ceanothus cordulatus Woodland Reference: NatureServe Biotics 2019 Description: This association ranges throughout the upper montane of the central and southern Sierra Nevada in California, although stands become more common to the north of the San Joaquin River and in the eastern Sierra Nevada. Elevations range from 2074 to 2867 m (6800-9400 feet), but stands are most commonly below 2440 m (8000 feet). Aspects are usually southeastern through southwestern on slopes that are gentle or moderate. Stands are located in middle and lower slope positions. Soils are usually formed in place over granitic or volcanic bedrock, and are generally deep, sandy loams. Soils are usually excessively drained, and soil temperatures are among the highest in the upper montane of the Sierra Nevada. Stands in this association are open woodlands with scattered, sometimes large patches of shrubs. Total tree cover is among the lowest of the forested associations of the upper montane of the Sierra Nevada. The shrub cover is significantly higher than other sites. The overstory is distinguished by the presence of <i>Pinus jeffreyi</i>, which averages 16% cover. <i>Abies magnifica</i> is generally present, and <i>Pinus contorta var. murrayana</i> or <i>Abies lowiana</i> may occasionally also be present. Where <i>Pinus jeffreyi</i> is not the dominant tree, the understories are dominated by <i>Ceanothus cordulatus, Artemisia tridentata, Purshia tridentata</i>, or <i>Chrysothamnus viscidiflorus</i> and indicate the association. The shrub layer is often a mix of species in two distinct types that occur on the westside or eastside forests. Westside stands tend to be clearly dominated by <i>Ceanothus cordulatus</i>, whereas eastside stands tend to be mixed low-shrub communities. Westside stands are dominated by <i>Ceanothus cordulatus</i> sometimes mixed with <i>Artemisia tridentata</i>. Eastside stands can be dominated by any one of four species: <i>Ceanothus cordulatus, Artemisia tridentata, Purshia tridentata</i>, or <i>Chrysothamnus viscidiflorus</i>. <i>Arabis platysperma, Gayophytum eriospermum, Elymus elymoides</i>, and <i>Achnatherum lemmonii</i> are the most frequent species in the herb layer.  Accession Code: urn:lsid:vegbank.org:commConcept:36676-{4748894E-B039-4534-B657-E46E29FDC15B} Plot-observations of this Community Concept: 1
	Party Perspective according to: NatureServe (organization) Perspective from: 03-May-2002 to: ongoing
	status: accepted Community's Parent: Pinus jeffreyi - Pinus ponderosa var. washoensis Mixed Conifer Woodland Alliance This Community's Level: Association This Community's Children: [none]		Names:   UID: ELEMENT_GLOBAL.2.687848 NatureServe Explorer   Code: CEGL008628   Translated: Jeffrey Pine / Mountain Whitethorn Woodland   Scientific: Pinus jeffreyi / Ceanothus cordulatus Woodland (convergence) and Synonyms: (similar) CEGL008628 (similar) Pinus jeffreyi / Ceanothus cordulatus Woodland (similar) Pinus jeffreyi / Ceanothus cordulatus Woodland