Taxon Report

Lomatium grayi (Coult. & Rose) Coult. & Rose

Gray's lomatium

Print Report

Taxon Summary

Lomatium grayi, commonly known as Gray's lomatium, is a perennial herb in the Apiaceae that is found in California and elsewhere. It occurs within Great Basin scrub, and Pinyon and juniper woodland, growing at elevations from 1390 to 1415 meters. Lomatium grayi is ranked 2B.3, Plants Rare, Threatened, or Endangered in California, But More Common Elsewhere; Not very threatened in California.

Classification


Scientific Name:	Lomatium grayi (Coult. & Rose) Coult. & Rose
Common Name:	Gray's lomatium
Family:	Apiaceae
Element Code:	PDAPI1B0Q0
USDA Plants Symbol:	LOGR
Synonyms/Other Names:

Ecology and Life History


Lifeform:	perennial herb
Blooming Period: Apr-Jun	Apr-Jun
Elevation:	1390-1415 (4560-4645)
General Habitats:	Great Basin scrub, Pinyon and juniper woodland
Microhabitat:
Microhabitat Details:

Conservation Status


CA Rare Plant Rank:	2B.3
Global Rank:	G5
State Rank:	S1S2
State List:	None
Fed List:	None
Other Status:
CRPR Changes:	changed from 2.3 to 2B.3 on 2013-06-12

Occurrence Data from the CNDDB


Total Occurrences:	4
Element Occurrence Ranks:
Excellent (A)	2
Good (B)	0
Fair (C)	0
Poor (D)	0
None (X)	0
Unknown (U)	2

Location


California Endemic: False
California Counties and Islands: Name (Code)
Modoc (MOD), Placer (PLA)
Quads: Name (Quad Code)
Cedarville (4112052), Lake City (4112062), Leonards Hot Springs (4112051), Truckee (3912032)

Threat List Data from the CNDDB


Threat List Total:	1
EOs with Threat Listed:	Total EOs	% of EOs
	1	25 %
Road/trail construction/maint.	1	25%

Notes



Known in CA only from near Lake City and Surprise Valley.
Threats:

Taxonomy:
Not in The Jepson Manual.

Selected References

Botanical Gazette 13:209 (1888)

Contributions from the U.S. National Herbarium 7:229 (1900)

Lomatium grayi profile for potential Species of Conservation Concern evaluation (2018)

Citation California Native Plant Society, Rare Plant Program. 2025. Rare Plant Inventory (online edition, v9.5.1). Website https://www.rareplants.cnps.org [accessed 15 November 2025].