Species Details

Hesperolinon sharsmithiae

Sharsmith's western flax

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Classification

Scientific Name: Hesperolinon sharsmithiae R. O’Donnell
Common Name: Sharsmith's western flax
Family:	Linaceae
Element Code:	PDLIN010E0
USDA Plants Symbol:
Synonyms/Other Names:

Conservation Status

CA Rare Plant Rank:	1B.2
Fed List:	None
State List:	None
Global Rank:	G2Q
State Rank:	S2
Other Status:	BLM_S; SB_UCSC
CRPR Changes: added to 1B.2 on 2012-12-14
Add Date:	2012-12-14
Date Edited:	2022-01-05

Ecology and Life History

Lifeform: annual herb

Blooming Period: May-Jul

Elevation:
270 - 300 meters
885 - 985 feet

General Habitats:

Chaparral

Microhabitat Details:

Microhabitat:

Serpentine

Notes

Notes: Threatened by development. Includes plants previously identified as H. tehamense and H. serpentinum ined. Similar to H. bicarpellatum, H. clevelandii, H. disjunctum, and H. tehamense. Not in TJM 2. See Madroño 53(4):404-408 (2006) for original description and The Four Seasons 13(4):1-54 (2010) for additional taxonomic information.
Threats:
Taxonomy:

Threat List Data from the CNDDB

THREAT LIST:
Threat List Total:	8
	Total EOs	% of EOs
EOs with Threat Listed:	10	31 %
Agriculture	6	18%
Development	3	9%
Grazing	1	3%
Non-native plant impacts	1	3%
Other	1	3%
Recreational use (non-ORV)	1	3%
Wood cutting or brush clearing	1	3%
Dam/Inundation	1	3%

Occurrence Data from the CNDDB

Element Occurrence Ranks:
Total Occurrences:					32
A	B	C	D	X	U
3	8	4	0	0	17

Occurrence Status:
Historical >20 Years	29
Recent <=20 Years	3

Presence:
Presumed Extant	32
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)

Quads: Name (Quad Code)
Aetna Springs (3812264), Capell Valley (3812242), Chiles Valley (3812253), Detert Reservoir (3812265), Jericho Valley (3812274), Lower Lake (3812285), Middletown (3812275), St. Helena (3812254), Walter Springs (3812263), Yountville (3812243)

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

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Selected References

CNPS Status Review:

CRPR List Addition on 2012-12-14