Species Details

Ceanothus purpureus

holly-leaved ceanothus

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Species Description:

Ceanothus purpureus, commonly known as holly-leaved ceanothus, is a perennial evergreen shrub in the Rhamnaceae that is found only in California. It occurs within Chaparral, and Cismontane woodland, growing at elevations from 120 to 640 meters. Ceanothus purpureus is ranked 1B.2, Plants Rare, Threatened or Endangered in California and Elsewhere; Moderately threatened in California.

Classification

Scientific Name: Ceanothus purpureus Jeps.
Common Name: holly-leaved ceanothus
Family:	Rhamnaceae
Element Code:	PDRHA04160
USDA Plants Symbol:	CEPU2
Synonyms/Other Names:
Name Status:	JEP, FNA, POWO, IPNI, Tropicos

Conservation Status

CA Rare Plant Rank:	1B.2
Fed List:	None
State List:	None
Global Rank:	G2
State Rank:	S2
Other Status:	SB_SBBG
CRPR Changes:
Add Date:	1974-01-01
Date Edited:	2021-10-04

Ecology and Life History

Lifeform: perennial evergreen shrub

Blooming Period: Feb-Jun

Elevation:
120 - 640 meters
395 - 2100 feet

General Habitats:

Chaparral
Cismontane woodland

Microhabitat Details:

Microhabitat:

Rocky
Volcanic

Notes

Notes: Threatened by agriculture, development, and alteration of fire regimes. See A Flora of Western Middle California , p. 258 (1901) by W. L. Jepson for original description, and Fremontia 15(4):25-26 (1988) for species account.
Threats:
Taxonomy:

Threat List Data from the CNDDB

THREAT LIST:
Threat List Total:	4
	Total EOs	% of EOs
EOs with Threat Listed:	8	19 %
Agriculture	7	16%
Road/trail construction/maint.	2	4%
Wood cutting or brush clearing	1	2%
Development	1	2%

Occurrence Data from the CNDDB

Element Occurrence Ranks:
Total Occurrences:					43
A	B	C	D	X	U
4	6	1	0	1	31

Occurrence Status:
Historical >20 Years	34
Recent <=20 Years	9

Presence:
Presumed Extant	42
Possibly Extirpated	1
Presumed Extirpated	0

Location

California Endemic:

California Island:

States: Name (Code)
California (CA)

California Counties and Islands: Name (Code)
Napa (NAP), Solano (SOL), Sonoma (SON)

Quads: Name (Quad Code)
Camp Meeker (3812248), Capell Valley (3812242), Cazadero (3812351), Detert Reservoir (3812265), Duncans Mills (3812341), Fort Ross (3812352), Guerneville (3812258), Kenwood (3812245), Mt. George (3812232), Santa Rosa (3812246), Sebastopol (3812247), St. Helena (3812254), Yountville (3812243)

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