Taxon Details

Ceanothus impressus var. nipomensis

Nipomo Mesa ceanothus

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Photo of Ceanothus impressus var. nipomensis

Taxon Summary:

Ceanothus impressus var. nipomensis, commonly known as Nipomo Mesa ceanothus, is a perennial shrub in the Rhamnaceae that is found only in California. It occurs within Chaparral, growing at elevations from 30 to 245 meters. Ceanothus impressus var. nipomensis is ranked 1B.2, Plants Rare, Threatened or Endangered in California and Elsewhere; Moderately threatened in California.

Classification

Scientific Name: Ceanothus impressus Trel. var. nipomensis McMinn
Common Name: Nipomo Mesa ceanothus
Family:	Rhamnaceae
Element Code:	PDRHA040L2
USDA Plants Symbol:	CEIMN
Synonyms/Other Names:
Name Status:	JEF, FNA, POWO, IPNI, Tropicos

Conservation Status

CA Rare Plant Rank:	1B.2
Fed List:	None
State List:	None
Global Rank:	G3T2
State Rank:	S2
Other Status:
CRPR Changes: changed from CBR to 1B.2 on 2019-05-15
Add Date:	2006-01-10
Date Edited:	2025-10-29

Ecology and Life History

Lifeform: perennial shrub

Blooming Period: Feb-Apr

Elevation:
30 - 245 meters
100 - 805 feet

General Habitats:

Chaparral

Microhabitat Details:

Microhabitat:

Sandy

Notes

Notes:
Threats: Possibly threatened by development and non-native plants.
Taxonomy:

Threat List Data from the CNDDB

THREAT LIST:
Threat List Total:	2
	Total EOs	% of EOs
EOs with Threat Listed:	1	7 %
Agriculture	1	7%
Development	1	7%

Occurrence Data from the CNDDB

Element Occurrence Ranks:
Total Occurrences:					14
A	B	C	D	X	U
0	0	0	0	0	14

Occurrence Status:
Historical >20 Years	10
Recent <=20 Years	4

Presence:
Presumed Extant	14
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)
Arroyo Grande NE (3512025), Nipomo (3512014), Oceano (3512015), Pismo Beach (3512026)

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 Status Review:	Proposed Addition to CRPR 1B.2, G3T2 / S2 (2019)
Original Description:	Ceanothus pp. 219-220 (1942)

CNPS Rare Plant Inventory