Taxon Report

Calochortus clavatus Wats. var. recurvifolius (Hoov.) Fiedler & Zebell

Arroyo de la Cruz mariposa-lily

Print Report

Taxon Summary

Calochortus clavatus var. recurvifolius, commonly known as Arroyo de la Cruz mariposa-lily, is a perennial bulbiferous herb in the Liliaceae that is found only in California. It occurs within Chaparral (maritime), Coastal bluff scrub, Coastal prairie, and Lower montane coniferous forest, growing at elevations from 10 to 120 meters. Calochortus clavatus var. recurvifolius is ranked 1B.2, Plants Rare, Threatened or Endangered in California and Elsewhere; Moderately threatened in California.

Classification


Scientific Name:	Calochortus clavatus Wats. var. recurvifolius (Hoov.) Fiedler & Zebell
Common Name:	Arroyo de la Cruz mariposa-lily
Family:	Liliaceae
Element Code:	PMLIL0D098
USDA Plants Symbol:	CACLR3
Synonyms/Other Names:	Calochortus clavatus Wats. ssp. recurvifolius (Hoov.) Munz

Ecology and Life History


Lifeform:	perennial bulbiferous herb
Blooming Period: Jun-Jul	Jun-Jul
Elevation:	10-120 (35-395)
General Habitats:	Chaparral, Coastal bluff scrub, Coastal prairie, Lower montane coniferous forest
Microhabitat:
Microhabitat Details:

Conservation Status


CA Rare Plant Rank:	1B.2
Global Rank:	G4T1
State Rank:	S1
State List:	None
Fed List:	None
Other Status:
CRPR Changes:

Occurrence Data from the CNDDB


Total Occurrences:	5
Element Occurrence Ranks:
Excellent (A)	0
Good (B)	3
Fair (C)	1
Poor (D)	0
None (X)	0
Unknown (U)	1

Location


California Endemic: True
California Counties and Islands: Name (Code)
San Luis Obispo (SLO)
Quads: Name (Quad Code)
Piedras Blancas (3512163)

Threat List Data from the CNDDB


Threat List Total:	2
EOs with Threat Listed:	Total EOs	% of EOs
	4	80 %
Grazing	4	80%
Erosion/runoff	1	20%

Notes



Known from fewer than ten occurrences.
Threats:
Threatened by grazing.
Taxonomy:
See Leaflets of Western Botany 10(8):126 (1964) for original description, and Madroño 42(3):406 (1995) for revised nomenclature.

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 25 October 2025].