Taxon Report

Lupinus albifrons Benth. var. johnstonii (C.P. Sm.) Jeps.

interior bush lupine

Print Report

Taxon Summary

Lupinus albifrons var. johnstonii, commonly known as interior bush lupine, is a perennial shrub in the Fabaceae that is found only in California. It occurs within Chaparral, and Lower montane coniferous forest, growing at elevations from 1500 to 2500 meters. Lupinus albifrons var. johnstonii is ranked 4.3, Plants of Limited Distribution, A Watch List; Not very threatened in California.

Classification


Scientific Name:	Lupinus albifrons Benth. var. johnstonii (C.P. Sm.) Jeps.
Common Name:	interior bush lupine
Family:	Fabaceae
Element Code:	PDFAB2B1J4
USDA Plants Symbol:
Synonyms/Other Names:	Lupinus excubitus var. johnstonii

Ecology and Life History


Lifeform:	perennial shrub
Blooming Period: May-Jul	May-Jul
Elevation:	1500-2500 (4920-8205)
General Habitats:	Chaparral, Lower montane coniferous forest
Microhabitat:	Decomposed granitic
Microhabitat Details:

Conservation Status


CA Rare Plant Rank:	4.3
Global Rank:	G4T4
State Rank:	S4
State List:	None
Fed List:	None
Other Status:
CRPR Changes:

Occurrence Data from the CNDDB


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

Location


California Endemic: True
California Counties and Islands: Name (Code)
Los Angeles (LAX)
Quads: Name (Quad Code)
Acton (3411842), Mescal Creek (3411746), Waterman Mtn. (3411738)

Threat List Data from the CNDDB


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

Notes



Known only from the San Gabriel Mtns. Collections from KRN Co. likely misidentified. See A Flora of California 2(3):252 (1936) for original description, and Systematic Botany 36(2):362-370 (2011) for taxonomic treatment.
Threats:

Taxonomy:

Selected References

Citation California Native Plant Society, Rare Plant Program. 2025. Rare Plant Inventory (online edition, v9.5.1). Website https://www.rareplants.cnps.org [accessed 18 July 2025].