Taxon Details

Claytonia peirsonii ssp. peirsonii

Peirson's spring beauty

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Taxon Summary:

Claytonia peirsonii ssp. peirsonii, commonly known as Peirson's spring beauty, is a perennial herb in the Montiaceae that is found only in California. It occurs within Subalpine coniferous forest, and Upper montane coniferous forest, growing at elevations from 1510 to 2745 meters. Claytonia peirsonii ssp. peirsonii is ranked 1B.2, Plants Rare, Threatened or Endangered in California and Elsewhere; Moderately threatened in California.

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.
Name Status:	JEF, FNA, POWO, IPNI, Tropicos

Conservation Status

CA Rare Plant Rank:	1B.2
Fed List:	None
State List:	None
Global Rank:	G2G3T2
State Rank:	S2
Other Status:	SB_CalBG/RSABG; USFS_S
CRPR Changes:
Add Date:	1974-01-01
Date Edited:	2021-06-03

Ecology and Life History

Lifeform: perennial herb

Blooming Period: (Mar)May-Jun

Elevation:
1510 - 2745 meters
4955 - 9005 feet

General Habitats:

Subalpine coniferous forest
Upper montane coniferous forest

Microhabitat Details:

Microhabitat:

Granitic
Metamorphic
Scree
Talus

Notes

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:

Threat List Data from the CNDDB

THREAT LIST:
Threat List Total:	6
	Total EOs	% of EOs
EOs with Threat Listed:	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%

Occurrence Data from the CNDDB

Element Occurrence Ranks:
Total Occurrences:					9
A	B	C	D	X	U
0	6	0	0	0	3

Occurrence Status:
Historical >20 Years	1
Recent <=20 Years	8

Presence:
Presumed Extant	9
Possibly Extirpated	0
Presumed Extirpated	0

Location

California Endemic:

California Island:

States: Name (Code)
California (CA)

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)

Notes:

Definitions of codes following a county and/or quad:
*		Presumed extirpated
(?)		Occurrence confirmed, but possibly extirpated
Quad and county data is imported from the CNDDB. Species may be present in other areas where conditions are favorable. These data should NOT be substituted for pre-project review or for on-site surveys.

Regional Map

Map

Presumed Extant

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CNPS Rare Plant Inventory