Localities documented in Tropicos sources
United States (North America)
Note: This information is based on publications available through Tropicos and may not represent the entire distribution. Tropicos does not categorize distributions as native or non-native.
Regularity: Regularly occurring
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.
Comments: Chaparral communities on sand, serpentine, or volcanic soils; settings include mountain slopes and sides of unpaved roads. 215 - 800 m.
Molecular Biology and Genetics
Barcode data: Ceanothus sonomensis
Statistics of barcoding coverage: Ceanothus sonomensis
Public Records: 3
Specimens with Barcodes: 3
Species With Barcodes: 1
National NatureServe Conservation Status
Rounded National Status Rank: N2 - Imperiled
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.
Comments: This species is seriously threatened by development (CNPS 2001).