Taxon Details

Ceanothus hearstiorum

Hearsts' ceanothus

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Taxon Summary:

Ceanothus hearstiorum, commonly known as Hearsts' ceanothus, is a perennial evergreen shrub in the Rhamnaceae that is found only in California. It occurs within Chaparral (maritime), Coastal prairie, and Coastal scrub, growing at elevations from 75 to 245 meters. Ceanothus hearstiorum is ranked 1B.2, Plants Rare, Threatened or Endangered in California and Elsewhere; Moderately threatened in California.

Classification

Scientific Name: Ceanothus hearstiorum Hoov. & Roof
Common Name: Hearsts' ceanothus
Family:	Rhamnaceae
Element Code:	PDRHA040J0
USDA Plants Symbol:	CEHE2
Synonyms/Other Names:
Name Status:	JEF, FNA, POWO, IPNI, Tropicos

Conservation Status

CA Rare Plant Rank:	1B.2
Fed List:	None
State List:	CR (1981-08-01)
Global Rank:	G1G2
State Rank:	S1S2
Other Status:
CRPR Changes:
Add Date:	1974-01-01
Date Edited:	2024-11-05

Ecology and Life History

Lifeform: perennial evergreen shrub

Blooming Period: Mar-Apr

Elevation:
75 - 245 meters
245 - 805 feet

General Habitats:

Chaparral (maritime)
Coastal prairie
Coastal scrub

Microhabitat Details:

Microhabitat:

Notes

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:

Threat List Data from the CNDDB

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

Occurrence Data from the CNDDB

Element Occurrence Ranks:
Total Occurrences:					6
A	B	C	D	X	U
0	1	0	0	0	5

Occurrence Status:
Historical >20 Years	5
Recent <=20 Years	1

Presence:
Presumed Extant	6
Possibly Extirpated	0
Presumed Extirpated	0

Location

California Endemic:

California Island:

States: Name (Code)
California (CA)

California Counties and Islands: Name (Code)
San Luis Obispo (SLO)

Quads: Name (Quad Code)
Piedras Blancas (3512163), San Simeon (3512162)

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.

Regional Map

Map

Presumed Extant

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CNPS Rare Plant Inventory