Taxon Report

Ceanothus hearstiorum Hoov. & Roof

Hearsts' ceanothus

Print Report


  Classification
Scientific Name:
 Ceanothus hearstiorum Hoov. & Roof
Common Name:
 Hearsts' ceanothus
Family: Rhamnaceae
Element Code: PDRHA040J0
USDA Plants Symbol: CEHE2
Synonyms/Other Names:

Ecology and Life History
Lifeform: perennial evergreen shrub
Blooming Period: Mar-Apr Mar-Apr
Elevation: 75-245 (245-805)
General Habitats: Chaparral, Coastal prairie, Coastal scrub
Microhabitat:
Microhabitat Details:

Conservation Status
CA Rare Plant Rank: 1B.2
Global Rank: G1G2
State Rank:
 S1S2
State List: CR
Fed List: None
Other Status:
CRPR Changes:

Occurrence Data from the CNDDB
Total Occurrences: 6
Element Occurrence Ranks:
   Excellent (A) 0
   Good (B) 1
   Fair (C) 0
   Poor (D) 0
   None (X) 0
   Unknown (U) 5

Location
California Endemic:  True
California Counties and Islands: Name (Code)
San Luis Obispo (SLO)
Quads: Name (Quad Code)
Piedras Blancas (3512163), San Simeon (3512162)

Threat List Data from the CNDDB

Threat List Total: 5
EOs with Threat Listed: Total EOs % of EOs
3 50 %
Foot traffic/trampling 2 33%
Grazing 2 33%
Other 2 33%
Development 1 16%
Improper burning regime 1 16%

Notes
Known from fewer than ten occurrences; need current status information. Possibly threatened by grazing. See Four Seasons 2:1-5 (1966) for original description.
Threats:
Taxonomy:

Selected References

Citation California Native Plant Society, Rare Plant Program. 2025. Rare Plant Inventory (online edition, v9.5.1). Website https://www.rareplants.cnps.org [accessed 8 January 2025].