Taxon Report

Arctostaphylos montana Eastw. ssp. montana

Mt. Tamalpais manzanita

Print Report

Taxon Summary

Arctostaphylos montana ssp. montana, commonly known as Mt. Tamalpais manzanita, is a perennial evergreen shrub in the Ericaceae that is found only in California. It occurs within Chaparral, and Valley and foothill grassland, growing at elevations from 160 to 760 meters. Arctostaphylos montana ssp. montana is ranked 1B.3, Plants Rare, Threatened or Endangered in California and Elsewhere; Not very threatened in California.

Classification


Scientific Name:	Arctostaphylos montana Eastw. ssp. montana
Common Name:	Mt. Tamalpais manzanita
Family:	Ericaceae
Element Code:	PDERI040J5
USDA Plants Symbol:
Synonyms/Other Names:	Arctostaphylos montana Eastw. Arctostaphylos hookeri ssp. montana

Ecology and Life History


Lifeform:	perennial evergreen shrub
Blooming Period: Feb-Apr	Feb-Apr
Elevation:	160-760 (525-2495)
General Habitats:	Chaparral, Valley and foothill grassland
Microhabitat:	Rocky, Serpentine
Microhabitat Details:

Conservation Status


CA Rare Plant Rank:	1B.3
Global Rank:	G3T3
State Rank:	S3
State List:	None
Fed List:	None
Other Status:	SB_UCBG
CRPR Changes:

Occurrence Data from the CNDDB


Total Occurrences:	15
Element Occurrence Ranks:
Excellent (A)	0
Good (B)	1
Fair (C)	0
Poor (D)	0
None (X)	0
Unknown (U)	14

Location


California Endemic: True
California Counties and Islands: Name (Code)
Marin (MRN)
Quads: Name (Quad Code)
Bolinas (3712286), Novato (3812215)?, San Geronimo (3812216), San Rafael (3712285)

Threat List Data from the CNDDB


Threat List Total:	3
EOs with Threat Listed:	Total EOs	% of EOs
	1	7 %
Improper burning regime	1	6%
Non-native plant impacts	1	6%
Road/trail construction/maint.	1	6%

Notes



See Proceedings of the California Academy of Sciences 1:83 (1897) for original description, and Madroño 19(6):200 (1968) for revised nomenclature.
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 24 February 2025].