Taxon Report

Arctostaphylos montaraensis Roof

Montara manzanita

Print Report


© 2016 Neal Kramer

Taxon Summary

Arctostaphylos montaraensis, commonly known as Montara manzanita, is a perennial evergreen shrub in the Ericaceae that is found only in California. It occurs within Chaparral (maritime), and Coastal scrub, growing at elevations from 80 to 500 meters. Arctostaphylos montaraensis is ranked 1B.2, Plants Rare, Threatened or Endangered in California and Elsewhere; Moderately threatened in California.

  Classification
Scientific Name:
 Arctostaphylos montaraensis Roof
Common Name:
 Montara manzanita
Family: Ericaceae
Element Code: PDERI042W0
USDA Plants Symbol: ARMO5
Synonyms/Other Names:

Ecology and Life History
Lifeform: perennial evergreen shrub
Blooming Period: Jan-Mar Jan-Mar
Elevation: 80-500 (260-1640)
General Habitats: Chaparral, Coastal scrub
Microhabitat:
Microhabitat Details:

Conservation Status
CA Rare Plant Rank: 1B.2
Global Rank: G1
State Rank:
 S1
State List: None
Fed List: None
Other Status: SB_CalBG/RSABG; SB_USDA
CRPR Changes:

Occurrence Data from the CNDDB
Total Occurrences: 4
Element Occurrence Ranks:
   Excellent (A) 2
   Good (B) 0
   Fair (C) 1
   Poor (D) 1
   None (X) 0
   Unknown (U) 0

Location
California Endemic:  True
California Counties and Islands: Name (Code)
San Mateo (SMT)
Quads: Name (Quad Code)
Montara Mountain (3712254), San Francisco South (3712264)

Threat List Data from the CNDDB

Threat List Total: 7
EOs with Threat Listed: Total EOs % of EOs
3 75 %
Improper burning regime 2 50%
Non-native plant impacts 2 50%
Road/trail construction/maint. 2 50%
Wood cutting or brush clearing 1 25%
Other 1 25%
Erosion/runoff 1 25%
Foot traffic/trampling 1 25%

Notes
Known from fewer than ten occurrences. Threatened by development and vehicles. See Four Seasons 2(3):8 (1967) 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 23 February 2025].