Hesperolinon breweri
Common Name: Brewer's western flax
Family: Linaceae
Element Code: PDLIN01030
Full Name: Hesperolinon breweri (Gray) Small

2007 Aaron Schusteff
Biology Glossary
Rarity Status Glossary
Occurrence Data from DFG
California Natural Diversity Database Glossary
  • Total # of Known Element Occurrences: 25
  • Element Occurrence Ranks:
    A B C D X U
    2 7 0 0 0 16
  • Population Status:
    >20 yrs
    <=20 yrs
    14 11
  • Presence:
    Present Extant Possibly Extirpated Extirpated
    25 0 0
Notes Glossary
  • 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.
  • To submit rare plant observation data, use the CNDDB field survey form. Please see also the CNPS Rare Plant Data page.
  • Date Added: 1974-01-01
  • Last Update: 2014-01-03
Location Glossary
  • Elevation: 30 - 945 meters
  • California Endemic: yes
  • States: California
  • California Counties and Islands:   name (code)
    Contra Costa (CCA),  Napa (NAP),  Solano (SOL)
  • Quads:   name (DWR code) USGS code
    Brentwood (463B) 37121H6,  Byron Hot Springs (463C) 37121G6,  Antioch South (464A) 37121H7,  Clayton (464B) 37121H8,  Diablo (464C) 37121G8,  Tassajara (464D) 37121G7,  Mt. Vaca (499A) 38122D1,  Capell Valley (499B) 38122D2,  Mt. George (499C) 38122C2,  Monticello Dam (515D) 38122E1
  • Notes:
      Definitions of codes preceding a county and/or quad:
      * Presumed extirpated
      ? Uncertain about distribution or identity
      ?* Uncertain about distribution, but presumed extirpated if once present
      (?) Occurrence confirmed, but possibly extirpated
      Species may be present in other areas where conditions are favorable.
Presumed Extant Presumed Extirpated or Unknown 404
Links to Leading Resources of Taxon Information
Suggested Citation
CNPS, Rare Plant Program. . Inventory of Rare and Endangered Plants (online edition, v8-02). California Native Plant Society, Sacramento, CA. Website http://www.rareplants.cnps.org [accessed ].

37121H6=Brentwood (463B) 37121H6;37121G6=Byron Hot Springs (463C) 37121G6;37121H7=Antioch South (464A) 37121H7;37121H8=Clayton (464B) 37121H8;37121G8=Diablo (464C) 37121G8;37121G7=Tassajara (464D) 37121G7;38122D1=Mt. Vaca (499A) 38122D1;38122D2=Capell Valley (499B) 38122D2;38122C2=Mt. George (499C) 38122C2;38122E1=Monticello Dam (515D) 38122E1