CNPS Inventory Plant Detail

Hesperolinon bicarpellatum

Common Name:	two-carpellate western flax
Family:	Linaceae
Synonyms:
Element Code:	PDLIN01020
Full Name:	Hesperolinon bicarpellatum (H.K. Sharsm.) H.K. Sharsm.
USDA PLANTS Symbol:	HEBI3

Biology
Lifeform: annual herb Blooming Period: May - July Habitat: • Chaparral (serpentinite)

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: S2.2 S2: Imperiled. .2: Threatened. Global Rank: G2 G2: Imperiled.

Occurrence Data from DFG
California Natural Diversity Database

Total # of Known Element Occurrences: 25
Element Occurrence Ranks:

A B C D X U

4 2 0 0 0 19

Population Status:

Historic >20 yrs	Recent <=20 yrs
20	5

Presence:

Present Extant	Possibly Extirpated	Extirpated
25	0	0

Notes

Previously confused with H. serpentinum, which also occurs on serpentinite soils in the same general area. Threatened by development and grazing. 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: 60 - 1005 meters

California Endemic: yes

States: California

California Counties and Islands: name (code)
Lake (LAK), Napa (NAP), Sonoma (SON)

Quads: name (DWR code) USGS code
Capell Valley (499B) 38122D2, Yountville (500A) 38122D3, Walter Springs (516A) 38122F3, Aetna Springs (516B) 38122F4, St. Helena (516C) 38122E4, Chiles Valley (516D) 38122E3, Detert Reservoir (517A) 38122F5, Mount St. Helena (517B) 38122F6, Jericho Valley (532C) 38122G4, Clearlake Highlands (533B) 38122H6, Whispering Pines (533C) 38122G6, Middletown (533D) 38122G5, Wilbur Springs (547C) 39122A4, Bartlett Mtn. (549A) 39122B7

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

403

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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