Taxon Report

Claytonia peirsonii (Munz & Johston) T.R. Stoughton ssp. bernardinus T.R. Stoughton

San Bernardino spring beauty

Print Report

Taxon Summary

Claytonia peirsonii ssp. bernardinus, commonly known as San Bernardino spring beauty, is a perennial herb in the Montiaceae that is found only in California. It occurs within Pinyon and juniper woodland, and Upper montane coniferous forest, growing at elevations from 2360 to 2465 meters. Claytonia peirsonii ssp. bernardinus is ranked 1B.1, Plants Rare, Threatened or Endangered in California and Elsewhere; Seriously threatened in California.

Classification


Scientific Name:	Claytonia peirsonii (Munz & Johston) T.R. Stoughton ssp. bernardinus T.R. Stoughton
Common Name:	San Bernardino spring beauty
Family:	Montiaceae
Element Code:	PDPOR03122
USDA Plants Symbol:
Synonyms/Other Names:

Ecology and Life History


Lifeform:	perennial herb
Blooming Period: Mar-Apr	Mar-Apr
Elevation:	2360-2465 (7745-8090)
General Habitats:	Pinyon and juniper woodland, Upper montane coniferous forest
Microhabitat:	Carbonate, Openings (usually), Rocky, Talus
Microhabitat Details:

Conservation Status


CA Rare Plant Rank:	1B.1
Global Rank:	G2G3T1
State Rank:	S1
State List:	None
Fed List:	None
Other Status:	SB_CalBG/RSABG
CRPR Changes:	added to 1B.1 on 2019-10-30

Occurrence Data from the CNDDB


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

Location


California Endemic: True
California Counties and Islands: Name (Code)
San Bernardino (SBD)
Quads: Name (Quad Code)
Fawnskin (3411638)

Threat List Data from the CNDDB


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

Notes



See Aliso 31(1): 35-42 (2013) for notes on discovery, and Systematic Botany 42(2): 283-300 (2017) for original description.
Threats:

Taxonomy:

Selected References

CRPR List Addition on 2019-10-30

Citation California Native Plant Society, Rare Plant Program. 2025. Rare Plant Inventory (online edition, v9.5.1). Website https://www.rareplants.cnps.org [accessed 27 October 2025].