Taxon Report

Arctostaphylos glandulosa Eastw. ssp. gabrielensis (P.V. Wells) J.E. Keeley, M.C. Vasey & V.T. Parker

San Gabriel manzanita

Print Report

Taxon Summary

Arctostaphylos glandulosa ssp. gabrielensis, commonly known as San Gabriel manzanita, is a perennial evergreen shrub in the Ericaceae that is found only in California. It occurs within Chaparral, growing at elevations from 595 to 1500 meters. Arctostaphylos glandulosa ssp. gabrielensis is ranked 1B.2, Plants Rare, Threatened or Endangered in California and Elsewhere; Moderately threatened in California.

Classification


Scientific Name:	Arctostaphylos glandulosa Eastw. ssp. gabrielensis (P.V. Wells) J.E. Keeley, M.C. Vasey & V.T. Parker
Common Name:	San Gabriel manzanita
Family:	Ericaceae
Element Code:	PDERI042P0
USDA Plants Symbol:
Synonyms/Other Names:	Arctostaphylos gabrielensis

Ecology and Life History


Lifeform:	perennial evergreen shrub
Blooming Period: Mar	Mar
Elevation:	595-1500 (1950-4920)
General Habitats:	Chaparral
Microhabitat:
Microhabitat Details:

Conservation Status


CA Rare Plant Rank:	1B.2
Global Rank:	G5T3
State Rank:	S3
State List:	None
Fed List:	None
Other Status:	BLM_S; SB_CalBG/RSABG; USFS_S
CRPR Changes:

Occurrence Data from the CNDDB


Total Occurrences:	35
Element Occurrence Ranks:
Excellent (A)	0
Good (B)	1
Fair (C)	0
Poor (D)	0
None (X)	0
Unknown (U)	34

Location


California Endemic: True
California Counties and Islands: Name (Code)
Los Angeles (LAX), San Bernardino (SBD), Santa Barbara (SBA)
Quads: Name (Quad Code)
Acton (3411842), Bates Canyon (3411988), Chilao Flat (3411831), Condor Peak (3411832), Crystal Lake (3411737), Cucamonga Peak (3411725), Juniper Hills (3411748), Manzanita Mtn. (3412081), Miranda Pine Mtn. (3512011), Mount San Antonio (3411736), Mt. Baldy (3411726), Mt. Wilson (3411821), Pacifico Mountain (3411841), Peak Mountain (3411987), Taylor Canyon (3511918), Waterman Mtn. (3411738)

Threat List Data from the CNDDB


Threat List Total:	5
EOs with Threat Listed:	Total EOs	% of EOs
	1	3 %
Development	1	2%
Foot traffic/trampling	1	2%
Other	1	2%
Road/trail construction/maint.	1	2%
Wood cutting or brush clearing	1	2%

Notes



Known only from Mill Creek Summit divide in the San Gabriel Mtns. Threatened by powerline construction. See Four Seasons 9(2):46 (1992) 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 31 January 2025].