Overview

Distribution

Global Range: Arroyo de la Cruz and Arroyo de los Chinos, San Luis Obispo County, California.

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Ecology

Habitat

Comments: Grassland and low prostrate shrub community of immediate coast; in chaparral at ca. 60m elevation.

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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: 1 - 5

Comments: 2 element occurrences on 1 ridge.

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Molecular Biology and Genetics

Molecular Biology

Barcode data: Ceanothus hearstiorum

The following is a representative barcode sequence, the centroid of all available sequences for this species.


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Statistics of barcoding coverage: Ceanothus hearstiorum

Barcode of Life Data Systems (BOLDS) Stats
Public Records: 1
Specimens with Barcodes: 1
Species With Barcodes: 1
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Conservation

Conservation Status

National NatureServe Conservation Status

United States

Rounded National Status Rank: N1 - Critically Imperiled

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NatureServe Conservation Status

Rounded Global Status Rank: G1 - Critically Imperiled

Reasons: Endemic to Californai, Ceanothus hearstiorum is known from fewer than ten extant occurrences. Grazing and development are threats to this species.

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Threats

Degree of Threat: High - medium

Comments: Devlopment and grazing are threats to this species (CNPS 2001, CNDDB 2003).

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Wikipedia

Ceanothus hearstiorum

Ceanothus hearstiorum is a species of flowering shrub known by the common names Hearst Ranch buckbrush and Hearst's ceanothus. This Ceanothus is endemic to California, where it grows wild only on the hilly coastline of San Luis Obispo County.

Description[edit]

This shrub is generally wider than it is tall and often lies prostrate in a mat on the ground. The younger branches are hairy and somewhat feltlike in texture. The distinctive evergreen leaves are oval to almost rectangular and have a cupped, rippled surface. The edges are toothed with tiny glandular knobs and the shiny surface may be dotted with more knobs. The underside of the leaf is fuzzy to hairy. The inflorescences are borne on short, stout stalks and the tiny flowers are lavender to blue with prominent yellow-anthered blue stamens.

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