Species Details

Ceanothus thyrsiflorus var. obispoensis

San Luis Obispo ceanothus

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Scientific Name:
Ceanothus thyrsiflorus Eschsch. var. obispoensis D. O. Burge
Common Name:
San Luis Obispo ceanothus
Family: Rhamnaceae
Element Code: PDRHA04461
USDA Plants Symbol:
Synonyms/Other Names:
Lifeform: perennial shrub
Blooming Period: Jun
Elevation:
140 - 225 meters
460 - 740 feet
General Habitat:
  • Chaparral
  • Cismontane woodland
General Micro Habitat:
Micro Habitat:
  • Dacite
Notes:

Potentially threatened by urbanization. Similar to C. thyrsiflorus var. griseus; differentiated by dense, wavy, matted hairs on abaxial surfaces of young leaves and twigs, often forming a tomentum that obscures tertiary leaf venation. See Systemic Botany 42(3):529-542 (2017) for original description.

Threats:
Taxonomy:
Other:
References:
Total Occurrences: 3
Element Occurrence Ranks:
A B C D X U
0 0 0 0 0 3
Occurrence Status:
Historical >20 Years 0
Recent <=20 Years 3
Presence:
Presumed Extant 3
Possibly Extirpated 0
Presumed Extirpated 0
California Endemic:
California Island:
States: Name (Code)
California (CA)
California Counties and Islands: Name (Code)
San Luis Obispo (SLO)
Quads: Name (Quad Code)
Morro Bay South (3512037)
Notes:
Definitions of codes following a county and/or quad:
* Presumed extirpated
(?) Occurrence confirmed, but possibly extirpated
Quad and county data is imported from the CNDDB. Species may be present in other areas where conditions are favorable. These data should NOT be substituted for pre-project review or for on-site surveys.

Map

Presumed Extant
Counties   Quads