Species Details

Hesperolinon bicarpellatum

two-carpellate western flax

Download Report Calflora eFlora CCH CalPhotos

Classification

Scientific Name: Hesperolinon bicarpellatum (H.K. Sharsm.) H.K. Sharsm.
Common Name: two-carpellate western flax
Family:	Linaceae
Element Code:	PDLIN01020
USDA Plants Symbol:	HEBI3
Synonyms/Other Names:

Conservation Status

CA Rare Plant Rank:	1B.2
Fed List:	None
State List:	None
Global Rank:	G2
State Rank:	S2
Other Status:	BLM_S; SB_UCSC
CRPR Changes:
Add Date:	1974-01-01
Date Edited:	2022-12-06

Ecology and Life History

Lifeform: annual herb

Blooming Period: (Apr)May-Jul

Elevation:
60 - 1005 meters
195 - 3295 feet

General Habitats:

Chaparral (serpentinite)

Microhabitat Details:

Microhabitat:

Notes

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.
Threats:
Taxonomy:

Threat List Data from the CNDDB

THREAT LIST:
Threat List Total:	5
	Total EOs	% of EOs
EOs with Threat Listed:	6	24 %
Road/trail construction/maint.	5	20%
Erosion/runoff	4	16%
Grazing	3	12%
Other	1	4%
Development	1	4%

Occurrence Data from the CNDDB

Element Occurrence Ranks:
Total Occurrences:					25
A	B	C	D	X	U
5	2	0	0	0	18

Occurrence Status:
Historical >20 Years	16
Recent <=20 Years	9

Presence:
Presumed Extant	25
Possibly Extirpated	0
Presumed Extirpated	0

Location

California Endemic:

California Island:

States: Name (Code)
California (CA)

California Counties and Islands: Name (Code)
Lake (LAK), Napa (NAP), Sonoma (SON)

Quads: Name (Quad Code)
Aetna Springs (3812264), Bartlett Mtn. (3912227), Clearlake Highlands (3812286), Detert Reservoir (3812265), Jericho Valley (3812274), Lucerne (3912217), Middletown (3812275), Mount St. Helena (3812266), Whispering Pines (3812276), Wilbur Springs (3912214)

Notes:

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.

Regional Map

Map

Presumed Extant

Click on quad for name. Hold Shift Key to use mouse scroll wheel

CNPS Rare Plant Inventory