Taxon Report

Eryngium jepsonii J.M. Coult. & Rose

Jepson's coyote-thistle

Print Report

Taxon Summary

Eryngium jepsonii, commonly known as Jepson's coyote-thistle, is a perennial herb in the Apiaceae that is found only in California. It occurs within Valley and foothill grassland, and Vernal pools, growing at elevations from 3 to 300 meters. Eryngium jepsonii is ranked 1B.2, Plants Rare, Threatened or Endangered in California and Elsewhere; Moderately threatened in California.

Classification


Scientific Name:	Eryngium jepsonii J.M. Coult. & Rose
Common Name:	Jepson's coyote-thistle
Family:	Apiaceae
Element Code:	PDAPI0Z130
USDA Plants Symbol:	ERJE2
Synonyms/Other Names:

Ecology and Life History


Lifeform:	perennial herb
Blooming Period: Apr-Aug	Apr-Aug
Elevation:	3-300 (10-985)
General Habitats:	Valley and foothill grassland, Vernal pools
Microhabitat:	Clay
Microhabitat Details:

Conservation Status


CA Rare Plant Rank:	1B.2
Global Rank:	G2
State Rank:	S2
State List:	None
Fed List:	None
Other Status:	SB_CalBG/RSABG
CRPR Changes:	added to 1B.2 on 2016-09-13

Occurrence Data from the CNDDB


Total Occurrences:	18
Element Occurrence Ranks:
Excellent (A)	2
Good (B)	1
Fair (C)	0
Poor (D)	0
None (X)	0
Unknown (U)	15

Location


California Endemic: True
California Counties and Islands: Name (Code)
Alameda (ALA), Contra Costa (CCA), Napa (NAP), San Mateo (SMT), Solano (SOL), Yolo (YOL)
Quads: Name (Quad Code)
Aetna Springs (3812264), Antioch South (3712187), Benicia (3812212), Briones Valley (3712282), Clayton (3712188), Cordelia (3812222), Denverton (3812128), Diablo (3712178), Hayward (3712261), Las Trampas Ridge (3712271), Oakland East (3712272), Palo Alto (3712242), Rutherford (3812244), Saxon (3812146), Sears Point (3812224), St. Helena (3812254), Tassajara (3712177), Walter Springs (3812263), Woodside (3712243), Yountville (3812243)

Threat List Data from the CNDDB


Threat List Total:	3
EOs with Threat Listed:	Total EOs	% of EOs
	2	11 %
Development	1	5%
Grazing	1	5%
Non-native plant impacts	1	5%

Notes



Similar to E. aristulatum var. aristulatum, with which it was previously misapplied (in part). See Contributions from the United States National Herbarium 7(1):54 (1900) for original description.
Threats:

Taxonomy:

Selected References

CRPR List Addition on 2016-09-13

Citation California Native Plant Society, Rare Plant Program. 2026. Rare Plant Inventory (online edition, v9.5.1). Website https://www.rareplants.cnps.org [accessed 10 March 2026].