Taxon Report

Claytonia peirsonii (Munz & I.M. Johnst.) Stoughton ssp. peirsonii

Peirson's spring beauty

Print Report

Classification


Scientific Name:	Claytonia peirsonii (Munz & I.M. Johnst.) Stoughton ssp. peirsonii
Common Name:	Peirson's spring beauty
Family:	Montiaceae
Element Code:	PDPOR03121
USDA Plants Symbol:
Synonyms/Other Names:	Claytonia lanceolata Pursh var. peirsonii M. J.

Ecology and Life History


Lifeform:	perennial herb
Blooming Period: (Mar)May-Jun	(Mar)May-Jun
Elevation:	1510-2745 (4955-9005)
General Habitats:	Subalpine coniferous forest, Upper montane coniferous forest
Microhabitat:	Granitic, Metamorphic, Scree, Talus
Microhabitat Details:

Conservation Status


CA Rare Plant Rank:	1B.2
Global Rank:	G2G3T2
State Rank:	S2
State List:	None
Fed List:	None
Other Status:	SB_CalBG/RSABG; USFS_S
CRPR Changes:	changed from 3.1 to 1B.2 on 2019-07-26 changed from 1B.1 to 3.1 on 2009-10-22

Occurrence Data from the CNDDB


Total Occurrences:	9
Element Occurrence Ranks:
Excellent (A)	0
Good (B)	6
Fair (C)	0
Poor (D)	0
None (X)	0
Unknown (U)	3

Location


California Endemic: True
California Counties and Islands: Name (Code)
Los Angeles (LAX), San Bernardino (SBD)
Quads: Name (Quad Code)
Crystal Lake (3411737), Cucamonga Peak (3411725), Juniper Hills (3411748), Telegraph Peak (3411735), Valyermo (3411747), Waterman Mtn. (3411738)

Threat List Data from the CNDDB


Threat List Total:	6
EOs with Threat Listed:	Total EOs	% of EOs
	6	67 %
Foot traffic/trampling	5	55%
Other	3	33%
Grazing	2	22%
Development	2	22%
Recreational use (non-ORV)	1	11%
Road/trail construction/maint.	1	11%

Notes



Threatened by foot traffic, recreational activities, and proposed ski area expansion. See Bulletin of the Torrey Botanical Club 49(12):352 (1923) for original description, and Systematic Botany 42(2):283-300 (2017) for revised nomenclature and taxonomic treatment.
Threats:

Taxonomy:

Selected References

Citation California Native Plant Society, Rare Plant Program. 2024. Rare Plant Inventory (online edition, v9.5.1). Website https://www.rareplants.cnps.org [accessed 25 December 2024].