CNPS Inventory Plant Detail

Hesperolinon breweri

Common Name:	Brewer's western flax
Family:	Linaceae
Synonyms:
Element Code:	PDLIN01030
Full Name:	Hesperolinon breweri (Gray) Small
USDA PLANTS Symbol:	HEBR4

Biology
Lifeform: annual herb Blooming Period: May - July Habitat: usually serpentinite. • Chaparral • Cismontane woodland • Valley and foothill grassland

Rarity Status
CA Rare Plant Rank: 1B.2 Rare, threatened, or endangered in California and elsewhere .2: Fairly endangered in California Federal Listing Status: Not Listed State Listing Status: Not Listed State Rank: S2 S2: Imperiled. Global Rank: G2 G2: Imperiled.

Occurrence Data from DFG
California Natural Diversity Database

Total # of Known Element Occurrences: 24
Element Occurrence Ranks:

A B C D X U

2 6 0 0 0 16

Population Status:

Historic >20 yrs	Recent <=20 yrs
13	11

Presence:

Present Extant	Possibly Extirpated	Extirpated
24	0	0

Notes

Need information on status of occurrences. 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: 2010-03-15

Location

Elevation: 30 - 900 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
USDA PLANTS Calflora CalPhotos Consortium of California Herbaria California Department of Fish and Game: CNDDB Quick Viewer

Suggested Citation
California Native Plant Society (CNPS). Inventory of Rare and Endangered Plants (online edition, v8-01a). California Native Plant Society. Sacramento, CA. Accessed on .

-121.875,37.875