CNPS Inventory Plant Detail

Hesperolinon adenophyllum

Common Name:	glandular western flax
Family:	Linaceae
Synonyms:
Element Code:	PDLIN01010
Full Name:	Hesperolinon adenophyllum (Gray) Small
USDA PLANTS Symbol:	HEAD

Biology
Lifeform: annual herb Blooming Period: May - August 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: S2.3 S2: Imperiled. .3: No current threats known. Global Rank: G2 G2: Imperiled.

Occurrence Data from DFG
California Natural Diversity Database

Total # of Known Element Occurrences: 40
Element Occurrence Ranks:

A B C D X U

2 9 1 0 0 28

Population Status:

Historic >20 yrs	Recent <=20 yrs
28	12

Presence:

Present Extant	Possibly Extirpated	Extirpated
40	0	0

Notes

Threatened by geothermal development, recreation, and grazing. Potentially threatened by urban development. See Proceedings of the American Academy of Arts and Sciences 8:624-625 (1873) for original description, and 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: 2011-09-20

Location

Elevation: 150 - 1315 meters

California Endemic: yes

States: California

California Counties and Islands: name (code)
Humboldt (HUM) ?*, Lake (LAK), Mendocino (MEN)

Quads: name (DWR code) USGS code
Clearlake Highlands (533B) 38122H6, Whispering Pines (533C) 38122G6, Kelseyville (534A) 38122H7, Highland Springs (534B) 38122H8, The Geysers (534D) 38122G7, Bartlett Springs (548B)? 39122B6, Bartlett Mtn. (549A) 39122B7, Upper Lake (549B) 39122B8, Lakeport (549C) 39122A8, Lucerne (549D) 39122A7, Cow Mountain (550A) 39123B1, Crockett Peak (565A) 39122D7, Lake Pillsbury (565B) 39122D8, Elk Mountain (565C) 39122C8, Potato Hill (565D) 39122C7, Van Arsdale Reservoir (566A) 39123D1, Foster Mtn. (566B) 39123D2, Redwood Valley (566C) 39123C2, Potter Valley (566D) 39123C1, Willits (567A) 39123D3, Burbeck (567B) 39123D4, Greenough Ridge (567C) 39123C4, Sanhedrin Mtn. (582D) 39123E1, Longvale (583C) 39123E4, Fortuna (654C)* 40124E2

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

402

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 .

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