Taxon Report

Ceanothus impressus Trel. var. nipomensis McMinn

Nipomo Mesa ceanothus

Print Report

Taxon Summary

Ceanothus impressus var. nipomensis, commonly known as Nipomo Mesa ceanothus, is a perennial shrub in the Rhamnaceae that is . 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:

Ecology and Life History


Lifeform:	perennial shrub
Blooming Period: Feb-Apr	Feb-Apr
Elevation:	30-245 (100-805)
General Habitats:	Chaparral
Microhabitat:	Sandy
Microhabitat Details:

Conservation Status


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

Occurrence Data from the CNDDB


Total Occurrences:	14
Element Occurrence Ranks:
Excellent (A)	0
Good (B)	0
Fair (C)	0
Poor (D)	0
None (X)	0
Unknown (U)	14

Location


California Endemic: False
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)

Threat List Data from the CNDDB


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

Notes




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

Selected References

Proposed Addition to CRPR 1B.2, G3T2 / S2 (2019)

Ceanothus pp. 219-220 (1942)

Citation California Native Plant Society, Rare Plant Program. 2025. Rare Plant Inventory (online edition, v9.5.1). Website https://www.rareplants.cnps.org [accessed 27 January 2025].