Taxon Report

Rupertia hallii (Rydb.) Grimes

Hall's rupertia

Print Report

Taxon Summary

Rupertia hallii, commonly known as Hall's rupertia, is a perennial herb in the Fabaceae that is found only in California. It occurs within Cismontane woodland, and Lower montane coniferous forest, growing at elevations from 545 to 2250 meters. Rupertia hallii is ranked 1B.2, Plants Rare, Threatened or Endangered in California and Elsewhere; Moderately threatened in California.

Classification


Scientific Name:	Rupertia hallii (Rydb.) Grimes
Common Name:	Hall's rupertia
Family:	Fabaceae
Element Code:	PDFAB62010
USDA Plants Symbol:	RUHA5
Synonyms/Other Names:

Ecology and Life History


Lifeform:	perennial herb
Blooming Period: Jun-Aug(Sep)	Jun-Aug(Sep)
Elevation:	545-2250 (1790-7380)
General Habitats:	Cismontane woodland, Lower montane coniferous forest
Microhabitat:	Openings (sometimes), Roadsides (often)
Microhabitat Details:

Conservation Status


CA Rare Plant Rank:	1B.2
Global Rank:	G2G3
State Rank:	S2S3
State List:	None
Fed List:	None
Other Status:	BLM_S; USFS_S
CRPR Changes:

Occurrence Data from the CNDDB


Total Occurrences:	51
Element Occurrence Ranks:
Excellent (A)	6
Good (B)	17
Fair (C)	23
Poor (D)	4
None (X)	0
Unknown (U)	1

Location


California Endemic: True
California Counties and Islands: Name (Code)
Butte (BUT), Tehama (TEH)
Quads: Name (Quad Code)
Barkley Mtn. (4012126), Butte Meadows (4012115), Cohasset (3912186), Devils Parade Ground (4012116), Onion Butte (4012125), Stirling City (3912185)

Threat List Data from the CNDDB


Threat List Total:	7
EOs with Threat Listed:	Total EOs	% of EOs
	37	73 %
Logging	30	58%
Road/trail construction/maint.	21	41%
Other	7	13%
Recreational use (non-ORV)	2	3%
ORV activity	2	3%
Vandalism/dumping/litter	1	1%
Improper burning regime	1	1%

Notes



Potentially threatened by road maintenance, logging, and vehicles. See North American Flora 24:11 (1919) for original description, and Memoirs of the New York Botanical Garden 61:1-114 (1990) for taxonomic treatment.
Threats:

Taxonomy:

Selected References

Rupertia hallii account for potential Species of Conservation Concern evaluation (2022)

Citation California Native Plant Society, Rare Plant Program. 2025. Rare Plant Inventory (online edition, v9.5.1). Website https://www.rareplants.cnps.org [accessed 30 October 2025].