Taxon Report

Lewisia longipetala (Piper) Clay

long-petaled lewisia

Print Report

Taxon Summary

Lewisia longipetala, commonly known as long-petaled lewisia, is a perennial herb in the Montiaceae that is found only in California. It occurs within Alpine boulder and rock field, Subalpine coniferous forest (mesic, and rocky), growing at elevations from 2500 to 2925 meters. Lewisia longipetala is ranked 1B.3, Plants Rare, Threatened or Endangered in California and Elsewhere; Not very threatened in California.

Classification


Scientific Name:	Lewisia longipetala (Piper) Clay
Common Name:	long-petaled lewisia
Family:	Montiaceae
Element Code:	PDPOR040K0
USDA Plants Symbol:	LELO2
Synonyms/Other Names:	Lewisia pygmaea (Gray) Rob. ssp. longipetala (Piper) Ferris

Ecology and Life History


Lifeform:	perennial herb
Blooming Period: Jul-Aug(Sep)	Jul-Aug(Sep)
Elevation:	2500-2925 (8205-9595)
General Habitats:	Alpine boulder and rock field, Subalpine coniferous forest
Microhabitat:	Granitic
Microhabitat Details:

Conservation Status


CA Rare Plant Rank:	1B.3
Global Rank:	G2
State Rank:	S2
State List:	None
Fed List:	None
Other Status:	USFS_S
CRPR Changes:

Occurrence Data from the CNDDB


Total Occurrences:	14
Element Occurrence Ranks:
Excellent (A)	4
Good (B)	6
Fair (C)	3
Poor (D)	0
None (X)	0
Unknown (U)	1

Location


California Endemic: True
California Counties and Islands: Name (Code)
El Dorado (ELD), Nevada (NEV), Placer (PLA)
Quads: Name (Quad Code)
Echo Lake (3812071), Granite Chief (3912023), Independence Lake (3912043), Norden (3912033), Pyramid Peak (3812072), Rockbound Valley (3812082)

Threat List Data from the CNDDB


Threat List Total:	4
EOs with Threat Listed:	Total EOs	% of EOs
	7	50 %
Other	3	21%
Development	2	14%
Grazing	2	14%
ORV activity	2	14%

Notes



Possibly threatened by horticultural collecting. Interim management guidelines prepared by the USFS in 1992. See Contributions from the U.S. National Herbarium 16:207 (1918) for original description.
Threats:

Taxonomy:

Selected References

Citation California Native Plant Society, Rare Plant Program. 2025. Rare Plant Inventory (online edition, v9.5.1). Website https://www.rareplants.cnps.org [accessed 14 March 2025].