Taxon Report

Lupinus antoninus Eastw.

Anthony Peak lupine

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Taxon Summary

Lupinus antoninus, commonly known as Anthony Peak lupine, is a perennial herb in the Fabaceae that is found only in California. It occurs within Lower montane coniferous forest, and Upper montane coniferous forest, growing at elevations from 1220 to 2285 meters. Lupinus antoninus is ranked 1B.2, Plants Rare, Threatened or Endangered in California and Elsewhere; Moderately threatened in California.

Classification


Scientific Name:	Lupinus antoninus Eastw.
Common Name:	Anthony Peak lupine
Family:	Fabaceae
Element Code:	PDFAB2B0C0
USDA Plants Symbol:	LUAN5
Synonyms/Other Names:

Ecology and Life History


Lifeform:	perennial herb
Blooming Period: May-Jul	May-Jul
Elevation:	1220-2285 (4005-7495)
General Habitats:	Lower montane coniferous forest, Upper montane coniferous forest
Microhabitat:	Rocky
Microhabitat Details:

Conservation Status


CA Rare Plant Rank:	1B.2
Global Rank:	G2
State Rank:	S2
State List:	None
Fed List:	None
Other Status:	USFS_S
CRPR Changes:	changed from 1B.3 to 1B.2 on 2017-10-18

Occurrence Data from the CNDDB


Total Occurrences:	6
Element Occurrence Ranks:
Excellent (A)	0
Good (B)	3
Fair (C)	0
Poor (D)	0
None (X)	0
Unknown (U)	3

Location


California Endemic: True
California Counties and Islands: Name (Code)
Colusa (COL), Glenn (GLE), Lake (LAK), Mendocino (MEN), Tehama (TEH), Trinity (TRI)
Quads: Name (Quad Code)
Bartlett Mtn. (3912227), Fouts Springs (3912236), Hull Mountain (3912258), Lucerne (3912217), Mendocino Pass (3912278), Solomon Peak (4012218), St. John Mtn. (3912246)

Threat List Data from the CNDDB


Threat List Total:	0
EOs with Threat Listed:	Total EOs	% of EOs
	0	%

Notes




Threats:
Possibly threatened by apparent hybridization with L. albifrons var. collinus.
Taxonomy:

Selected References

Leaflets of Western Botany 3(9):202 (1943)

Lupinus antoninus profile for potential Species of Conservation Concern evaluation (2017)

Citation California Native Plant Society, Rare Plant Program. 2025. Rare Plant Inventory (online edition, v9.5.1). Website https://www.rareplants.cnps.org [accessed 31 October 2025].