Taxon Details

Calochortus monanthus

single-flowered mariposa-lily

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Taxon Summary:

Calochortus monanthus, commonly known as single-flowered mariposa-lily, is a perennial bulbiferous herb in the Liliaceae that is found only in California. It occurs within Meadows and seeps, growing at elevations from 745 to 800 meters. Calochortus monanthus is ranked 1A, Plants Presumed Extirpated in California and Either Rare or Extinct Elsewhere.

Classification

Scientific Name: Calochortus monanthus Ownbey
Common Name: single-flowered mariposa-lily
Family:	Liliaceae
Element Code:	PMLIL0D0W0
USDA Plants Symbol:	CAMO2
Synonyms/Other Names:
Name Status:	JEF, FNA, POWO, IPNI, Tropicos

Conservation Status

CA Rare Plant Rank:	1A
Fed List:	None
State List:	None
Global Rank:	GX
State Rank:	SX
Other Status:	BLM_S
CRPR Changes:
Add Date:	1974-01-01
Date Edited:	2024-11-05

Ecology and Life History

Lifeform: perennial bulbiferous herb

Blooming Period: Jun

Elevation:
745 - 800 meters
2445 - 2625 feet

General Habitats:

Meadows and seeps

Microhabitat Details:

Microhabitat:

Notes

Notes: Known only from the type collection (in 1876) along the Shasta River, now mostly converted to agriculture. Rediscovery attempts unsuccessful. See Annals of the Missouri Botanical Garden 27:371-560 (1940) 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 %
Grazing	1	100%
Non-native plant impacts	1	100%

Occurrence Data from the CNDDB

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

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

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)
Siskiyou (SIS)*

Quads: Name (Quad Code)
Hawkinsville (4112275)*, Montague (4112265)?*

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