CNPS

CNPS Rare Plant Inventory

Taxon Details

Arctostaphylos tomentosa ssp. daciticola

dacite manzanita

  View Report   Copy Link Calflora eFlora CCH CalPhotos iNaturalist
Photo of Arctostaphylos tomentosa ssp. daciticola
© 2019 Susan McDougall 		Photo of Arctostaphylos tomentosa ssp. daciticola
© 2019 Susan McDougall 		Photo of Arctostaphylos tomentosa ssp. daciticola
© 2012 Aaron E. Sims

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:
Name Status: JEF, FNA, POWO,
IPNI, Tropicos

  Conservation Status

CA Rare Plant Rank: 1B.1
Fed List: None
State List: None
Global Rank: G4T1
State Rank:
 S1
Other Status: SB_UCSC
CRPR Changes:
Add Date: 1994-01-01
Date Edited: 2025-10-29

  Ecology and Life History

Lifeform: perennial evergreen shrub
Blooming Period: Mar-May
JFMAMJJASOND
Elevation:
100 - 300 meters
330 - 985 feet
General Habitats:
  • Chaparral
  • Cismontane woodland
Microhabitat Details: dacite porphyry buttes
Microhabitat:

  Notes

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

  Threat List Data from the CNDDB

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

 

  Occurrence Data from the CNDDB

Total Occurrences: 3
Element Occurrence Ranks:
A B C D X U
0 0 0 0 0 3
Occurrence Status:
Historical >20 Years 1
Recent <=20 Years 2
Presence:
Presumed Extant 3
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)
Morro Bay South (3512037)
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
Click on quad for name. Hold Shift Key to use mouse scroll wheel

  Selected References

Go to top


Suggested 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].
}