Taxon Details

Claytonia peirsonii ssp. yorkii

York's spring beauty

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Taxon Summary:

Claytonia peirsonii ssp. yorkii, commonly known as York's spring beauty, is a perennial herb in the Montiaceae that is found only in California. It occurs within Cismontane woodland, growing at elevations from 1450 to 1505 meters. Claytonia peirsonii ssp. yorkii is ranked 1B.1, Plants Rare, Threatened or Endangered in California and Elsewhere; Seriously threatened in California.

Classification

Scientific Name: Claytonia peirsonii (Munz & Johnston) T.R. Stoughton ssp. yorkii T.R. Stoughton
Common Name: York's spring beauty
Family:	Montiaceae
Element Code:	PDPOR03124
USDA Plants Symbol:
Synonyms/Other Names:
Name Status:	JEF, FNA, POWO, IPNI, Tropicos

Conservation Status

CA Rare Plant Rank:	1B.1
Fed List:	None
State List:	None
Global Rank:	G2G3T1
State Rank:	S1
Other Status:	BLM_S
CRPR Changes: added to 1B.1 on 2019-11-04
Add Date:	2019-11-04
Date Edited:	2025-07-01

Ecology and Life History

Lifeform: perennial herb

Blooming Period: Mar-May

Elevation:
1450 - 1505 meters
4755 - 4940 feet

General Habitats:

Cismontane woodland

Microhabitat Details:

Microhabitat:

Alkaline
Openings (usually)
Rocky
Talus
Volcanic

Notes

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:

Threat List Data from the CNDDB

THREAT LIST:
Threat List Total:	2
	Total EOs	% of EOs
EOs with Threat Listed:	1	100 %
ORV activity	1	100%
Other	1	100%

Occurrence Data from the CNDDB

Element Occurrence Ranks:
Total Occurrences:					1
A	B	C	D	X	U
1	0	0	0	0	0

Occurrence Status:
Historical >20 Years	0
Recent <=20 Years	1

Presence:
Presumed Extant	1
Possibly Extirpated	0
Presumed Extirpated	0

Location

California Endemic:

California Island:

States: Name (Code)
California (CA)

California Counties and Islands: Name (Code)
Kern (KRN)

Quads: Name (Quad Code)
Cross Mountain (3511832)

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