Taxon Details

Leptosiphon jepsonii

Jepson's leptosiphon

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Taxon Summary:

Leptosiphon jepsonii, commonly known as Jepson's leptosiphon, is a annual herb in the Polemoniaceae that is found only in California. It occurs within Chaparral, Cismontane woodland, and Valley and foothill grassland, growing at elevations from 100 to 500 meters. Leptosiphon jepsonii is ranked 1B.2, Plants Rare, Threatened or Endangered in California and Elsewhere; Moderately threatened in California.

Classification

Scientific Name: Leptosiphon jepsonii (D.W. Schemske & C. Goodwillie) Porter & Johnson
Common Name: Jepson's leptosiphon
Family:	Polemoniaceae
Element Code:	PDPLM09140
USDA Plants Symbol:	LEJE
Synonyms/Other Names: Linanthus jepsonii D.W. Schemske & C. Goodwillie
Name Status:	JEF, FNA, POWO, IPNI, Tropicos

Conservation Status

CA Rare Plant Rank:	1B.2
Fed List:	None
State List:	None
Global Rank:	G2G3
State Rank:	S2S3
Other Status:	SB_CalBG/RSABG; SB_USDA
CRPR Changes:
Add Date:	2001-01-01
Date Edited:	2022-01-05

Ecology and Life History

Lifeform: annual herb

Blooming Period: Mar-May

Elevation:
100 - 500 meters
330 - 1640 feet

General Habitats:

Chaparral
Cismontane woodland
Valley and foothill grassland

Microhabitat Details:

Microhabitat:

Volcanic (usually)

Notes

Notes: Threatened by habitat conversion and non-native plants. Similar to L. parviflorus. Not in The Jepson Manual. See Madroño 43(4):455 (1996) for original description, and Aliso 19(1):55-91 (2000) for revised nomenclature.
Threats:
Taxonomy:

Threat List Data from the CNDDB

THREAT LIST:
Threat List Total:	8
	Total EOs	% of EOs
EOs with Threat Listed:	8	16 %
Agriculture	3	5%
Non-native plant impacts	3	5%
ORV activity	2	3%
Other	1	1%
Road/trail construction/maint.	1	1%
Foot traffic/trampling	1	1%
Improper burning regime	1	1%
Mining	1	1%

Occurrence Data from the CNDDB

Element Occurrence Ranks:
Total Occurrences:					51
A	B	C	D	X	U
2	4	1	1	0	43

Occurrence Status:
Historical >20 Years	27
Recent <=20 Years	24

Presence:
Presumed Extant	51
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), Solano (SOL), Sonoma (SON), Yolo (YOL)

Quads: Name (Quad Code)
Aetna Springs (3812264), Calistoga (3812255), Capell Valley (3812242), Cazadero (3812351), Chiles Valley (3812253), Cordelia (3812222), Detert Reservoir (3812265), Glen Ellen (3812235), Jimtown (3812267), Kenwood (3812245), Mark West Springs (3812256), Middletown (3812275), Monticello Dam (3812251), Mount St. Helena (3812266), Napa (3812233), Rutherford (3812244), Santa Rosa (3812246), St. Helena (3812254), Walter Springs (3812263), Whispering Pines (3812276), 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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CNPS Rare Plant Inventory