Taxon Report

Baccharis vanessae Beauch.

Encinitas baccharis

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Taxon Summary

Baccharis vanessae, commonly known as Encinitas baccharis, is a perennial deciduous shrub in the Asteraceae that is found only in California. It occurs within Chaparral (maritime), and Cismontane woodland, growing at elevations from 60 to 720 meters. Baccharis vanessae is ranked 1B.1, Plants Rare, Threatened or Endangered in California and Elsewhere; Seriously threatened in California.


  Classification

Scientific Name:
Baccharis vanessae Beauch.
Common Name:
Encinitas baccharis
Family: Asteraceae
Element Code: PDAST0W0P0
USDA Plants Symbol: BAVA3
Synonyms/Other Names:

Ecology and Life History

Lifeform: perennial deciduous shrub
Blooming Period: Aug-Nov Aug-Nov
Elevation: 60-720 (195-2360)
General Habitats: Chaparral, Cismontane woodland
Microhabitat: Sandstone
Microhabitat Details:

Occurrence Data from the CNDDB

Total Occurrences: 31
Element Occurrence Ranks:
   Excellent (A) 1
   Good (B) 8
   Fair (C) 1
   Poor (D) 5
   None (X) 4
   Unknown (U) 12
California Endemic:  True
California Counties and Islands: Name (Code)
San Diego (SDG)
Quads: Name (Quad Code)
Alpine (3211677), Del Mar (3211782), Encinitas (3311713), Escondido (3311711), Margarita Peak (3311744), Otay Mountain (3211657), Poway (3211781), Rancho Santa Fe (3311712), San Marcos (3311722), San Pasqual (3311618), San Vicente Reservoir (3211688)

Threat List Data from the CNDDB

Threat List Total: 15
EOs with Threat Listed: Total EOs % of EOs
20 65 %
Development 13 41%
Non-native plant impacts 11 35%
Road/trail construction/maint. 10 32%
Improper burning regime 9 29%
Foot traffic/trampling 7 22%
Vandalism/dumping/litter 7 22%
Other 7 22%
Wood cutting or brush clearing 5 16%
Erosion/runoff 4 12%
Insufficient population/stand size 3 9%
Recreational use (non-ORV) 2 6%
Grazing 1 3%
Feral pigs 1 3%
Altered flood/tidal/hydrologic regime 1 3%
Dam/Inundation 1 3%

Notes

Extirpated from Encinitas area. Threatened by development, foot traffic, and recreation. Possibly threatened by non-native plants. See Phytologia 46(4):216-222 (1980) for original description, and MadroƱo 40(2):133 (1993) for range extension information.
Threats:
Taxonomy:
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 February 2025].