Species Details

Hesperolinon breweri

Brewer's western flax

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Photo of Hesperolinon breweri
© 2014 Neal Kramer
Photo of Hesperolinon breweri
© 2007 Aaron Schusteff
Photo of Hesperolinon breweri
© 2007 Aaron Schusteff
Scientific Name:
Hesperolinon breweri (Gray) Small
Common Name:
Brewer's western flax
Family: Linaceae
Element Code: PDLIN01030
USDA Plants Symbol: HEBR4
Synonyms/Other Names:
Lifeform: annual herb
Blooming Period: May-Jul
JFMAMJJASOND
Elevation:
30 - 945 meters
100 - 3100 feet
General Habitats:
  • Chaparral
  • Cismontane woodland
  • Valley and foothill grassland
Microhabitat Details:
Microhabitat:
  • Serpentine (usually)
Notes:
Threatened by development, and several occurrences threatened by construction of Los Vaqueros Reservoir. See University of California Publications in Botany 32:235-314 (1961) for taxonomic treatment.
Threats:
Taxonomy:
Threat List Total: 10
Total EOs % of EOs
EOs with Threat Listed: 15 52 %
THREAT LIST:
Development 6 20%
Non-native plant impacts 4 13%
Other 3 10%
Foot traffic/trampling 3 10%
Grazing 2 6%
Total Occurrences: 29
Element Occurrence Ranks:
A B C D X U
2 10 2 1 0 14
Occurrence Status:
Historical >20 Years 16
Recent <=20 Years 13
Presence:
Presumed Extant 29
Possibly Extirpated 0
Presumed Extirpated 0
California Endemic:
California Island:
States: Name (Code)
California (CA)
California Counties and Islands: Name (Code)
Alameda (ALA), Contra Costa (CCA), Napa (NAP), Solano (SOL)
Quads: Name (Quad Code)
Antioch South (3712187), Brentwood (3712186), Byron Hot Springs (3712176), Capell Valley (3812242), Clayton (3712188), Diablo (3712178), Fairfield North (3812231), Midway (3712165), Monticello Dam (3812251), Mt. George (3812232), Mt. Vaca (3812241), Tassajara (3712177)
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.
Presumed Extant
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