Overview

Distribution

Global Range: Restricted to serpentine soils in vicinity of Occidental and Camp Meeker, Sonoma County, California.

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Ecology

Habitat

Comments: Serpentine in chaparral.

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Population Biology

Number of Occurrences

Note: For many non-migratory species, occurrences are roughly equivalent to populations.

Estimated Number of Occurrences: 6 - 20

Comments: Arctostaphylos bakeri ssp. bakeri is known from fewer than ten occurreces (Skinner 1997).

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Conservation

Conservation Status

National NatureServe Conservation Status

United States

Rounded National Status Rank: N2 - Imperiled

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NatureServe Conservation Status

Rounded Global Status Rank: G2 - Imperiled

Reasons: Endemic to Sonoma County in California, Arctostaphylos bakeri comprises two subspecies: ssp. bakeri and ssp. sublaevis. A. bakeri ssp. bakeri is known from fewer than ten occurrences. The subspecies is threatened by road construction and widening, non-native plants, and dumping, and potentially by development (CNPS 2001). In addition, subspecies bakeri is also threatened at one occurrence by heavy grazing and bulldozing (CNDDB 2003). The CNPS (2001) considers subspecies bakeri seriously endangered and subspecies sublaevis as fairly endangered. Subspecies sublaevis is potentially threatened by mining (chromite and magnesium) and is threatened by development (CNDDB 2003).

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Threats

Comments: Subspecies bakeri is threatened by road construction and widening, non-native plants, and dumping, and potentially by development (CNPS 2001). In addition, subspecies bakeri is also threatened at one occurrence by heavy grazing and bulldozing (CNDDB 2003). The Californica Native Plant Society (2001) considers subspecies bakeri seriously endangered and subspecies sublaevis as fairly endangered. Subspecies sublaevis is potentially threatened by mining (chromite and magnesium) and is threatened by development (CNDDB 2003).

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Wikipedia

Arctostaphylos bakeri

Arctostaphylos bakeri is a species of manzanita known by the common name Baker's manzanita. It is endemic to Sonoma County, California, where it grows in the chaparral and woodlands of the North Coast Ranges. It is sometimes a member of the serpentine soils flora.

Description[edit]

Arctostaphylos bakeri is a shrub growing one to three meters in height. Its smaller twigs are bristly and glandular or hairy to woolly. The dark green leaves are generally oval in shape and up to 3 centimeters long. They may be glandular, rough or fuzzy in texture, and dull or shiny in appearance.

The plentiful inflorescences hold crowded clusters of urn-shaped manzanita flowers. The fruit is a hairless drupe up to a centimeter wide.

See also[edit]

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