Taxon Report

Calyptridium quadripetalum Wats.

four-petaled pussypaws

Print Report

Taxon Summary

Calyptridium quadripetalum, commonly known as four-petaled pussypaws, is a annual herb in the Montiaceae that is found only in California. It occurs within Chaparral, and Lower montane coniferous forest, growing at elevations from 315 to 2040 meters. Calyptridium quadripetalum is ranked 4.3, Plants of Limited Distribution, A Watch List; Not very threatened in California.

Classification


Scientific Name:	Calyptridium quadripetalum Wats.
Common Name:	four-petaled pussypaws
Family:	Montiaceae
Element Code:	PDPOR09080
USDA Plants Symbol:
Synonyms/Other Names:

Ecology and Life History


Lifeform:	annual herb
Blooming Period: Apr-Jun	Apr-Jun
Elevation:	315-2040 (1035-6695)
General Habitats:	Chaparral, Lower montane coniferous forest
Microhabitat:	Gravelly (sometimes), Sandy (sometimes), Serpentine (usually)
Microhabitat Details:

Conservation Status


CA Rare Plant Rank:	4.3
Global Rank:	G4
State Rank:	S4
State List:	None
Fed List:	None
Other Status:	SB_UCBG
CRPR Changes:

Occurrence Data from the CNDDB


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

Location


California Endemic: True
California Counties and Islands: Name (Code)
Colusa (COL), Lake (LAK), Mendocino (MEN), Napa (NAP), Sonoma (SON), Tehama (TEH)
Quads: Name (Quad Code)
Clearlake Highlands (3812286), Detert Reservoir (3812265), Fouts Springs (3912236), Highland Springs (3812288), Hough Springs (3912225), Jericho Valley (3812274), Kelseyville (3812287), Knoxville (3812273), Leesville (3912224), Raglin Ridge (4012216), The Geysers (3812277), Whispering Pines (3812276), Wilbur Springs (3912214)

Threat List Data from the CNDDB


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

Notes



Threatened by vehicles. See Proceedings of the American Academy of Arts and Sciences 20:356 (1885) 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 1 February 2025].