Species Details

Hesperolinon adenophyllum

glandular western flax

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Photo by © 2002 John Game  max-height:128px; max-width:145px;
© 2002 John Game
Photo by © 2017 John Doyen  max-height:128px; max-width:145px;
© 2017 John Doyen
Photo by © 2002 John Game  max-height:128px; max-width:145px;
© 2002 John Game
Scientific Name:
Hesperolinon adenophyllum (Gray) Small
Common Name:
glandular western flax
Family: Linaceae
Element Code: PDLIN01010
USDA Plants Symbol: HEAD
Synonyms/Other Names:
Lifeform: annual herb
Blooming Period: May-Aug
150 - 1315 meters
490 - 4315 feet
General Habitat:
  • Chaparral
  • Cismontane woodland
  • Valley and foothill grassland
General Micro Habitat:
Micro Habitat:
  • Serpentinite (usually)

Threatened by geothermal development, recreation, and grazing. Potentially threatened by urban development.

Total Occurrences: 48
Element Occurrence Ranks:
2 10 1 0 0 35
Occurrence Status:
Historical >20 Years 38
Recent <=20 Years 10
Presumed Extant 48
Possibly Extirpated 0
Presumed Extirpated 0
California Endemic:
California Island:
States: Name (Code)
California (CA)
California Counties and Islands: Name (Code)
Lake (LAK), Mendocino (MEN)
Quads: Name (Quad Code)
Bartlett Mtn. (3912227), Burbeck (3912344), Cow Mountain (3912321), Crockett Peak (3912247), Elk Mountain (3912238), Foster Mtn. (3912342), Greenough Ridge (3912334), Highland Springs (3812288), Kelseyville (3812287), Lake Pillsbury (3912248), Lakeport (3912218), Laughlin Range (3912333), Laytonville (3912364), Longvale (3912354), Lucerne (3912217), Potato Hill (3912237), Potter Valley (3912331), Sanhedrin Mtn. (3912351), The Geysers (3812277), Upper Lake (3912228), Van Arsdale Reservoir (3912341), Whispering Pines (3812276), Willits (3912343)
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
Counties   Quads
Original Description: Proceedings of the American Academy of Arts and Sciences 8:624-625 (1873)
Taxonomic Treatment: University of California Publications in Botany 32:235-314 (1961)
Species Account: Hesperolinon adenophyllum profile for potential Species of Conservation Concern evaluation (2018)