Overview

Distribution

National Distribution

United States

Origin: Native

Regularity: Regularly occurring

Currently: Present

Confidence: Confident

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Physical Description

Type Information

Syntype for Ceanothus sonomensis J.T. Howell
Catalog Number: US 1765653
Collection: Smithsonian Institution, National Museum of Natural History, Department of Botany
Verification Degree: Status verified from secondary sources
Preparation: Pressed specimen
Collector(s): J. T. Howell
Year Collected: 1933
Locality: Triniti Mt., Sonoma, California, United States, North America
  • Syntype: Howell, J. T. 1939. Leafl. W. Bot. 2: 162.
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Ecology

Habitat

Comments: Chaparral communities on sand, serpentine, or volcanic soils; settings include mountain slopes and sides of unpaved roads. 215 - 800 m.

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Molecular Biology and Genetics

Molecular Biology

Barcode data: Ceanothus sonomensis

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 sonomensis

Barcode of Life Data Systems (BOLDS) Stats
Public Records: 3
Specimens with Barcodes: 3
Species With Barcodes: 1
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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 California, Ceanothus sonomensis (C. cuneatus ssp. sonomensis) is known from approximately ten extant occurrences. One occurrence is in Napa County and the others are in Sonoma County. Development is a serious threat.

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Threats

Comments: This species is seriously threatened by development (CNPS 2001).

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Names and Taxonomy

Taxonomy

Comments: Kartesz (1999) recognizes this taxon as the full species Ceanothus sonomensis; it has also been treated as Ceanothus cuneatus ssp. sonomensis (e.g., by Kartesz, 1994).

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