Taxon Report

Arctostaphylos tomentosa (Pursh) Lindl. ssp. daciticola Wells

dacite manzanita

Print Report

Taxon Summary

Arctostaphylos tomentosa ssp. daciticola, commonly known as dacite manzanita, is a perennial evergreen shrub in the Ericaceae that is found only in California. It occurs within Chaparral, and Cismontane woodland, growing at elevations from 100 to 300 meters. Arctostaphylos tomentosa ssp. daciticola is ranked 1B.1, Plants Rare, Threatened or Endangered in California and Elsewhere; Seriously threatened in California.

Classification


Scientific Name:	Arctostaphylos tomentosa (Pursh) Lindl. ssp. daciticola Wells
Common Name:	dacite manzanita
Family:	Ericaceae
Element Code:	PDERI041HD
USDA Plants Symbol:	ARTOD2
Synonyms/Other Names:

Ecology and Life History


Lifeform:	perennial evergreen shrub
Blooming Period: Mar-May	Mar-May
Elevation:	100-300 (330-985)
General Habitats:	Chaparral, Cismontane woodland
Microhabitat:
Microhabitat Details:	dacite porphyry buttes

Conservation Status


CA Rare Plant Rank:	1B.1
Global Rank:	G4T1
State Rank:	S1
State List:	None
Fed List:	None
Other Status:	SB_UCSC
CRPR Changes:

Occurrence Data from the CNDDB


Total Occurrences:	3
Element Occurrence Ranks:
Excellent (A)	0
Good (B)	0
Fair (C)	0
Poor (D)	0
None (X)	0
Unknown (U)	3

Location


California Endemic: True
California Counties and Islands: Name (Code)
San Luis Obispo (SLO)
Quads: Name (Quad Code)
Morro Bay South (3512037)

Threat List Data from the CNDDB


Threat List Total:	0
EOs with Threat Listed:	Total EOs	% of EOs
	0	%

Notes



Known only from Hollister Peak. See Four Seasons 9(2):60 (1992) for original description.
Threats:
Potentially threatened by urbanization.
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 5 November 2025].