CNPS

CNPS Rare Plant Inventory

Species Details

Calochortus monanthus

single-flowered mariposa-lily

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  Classification

Scientific Name:
Calochortus monanthus Ownbey
Common Name:
single-flowered mariposa-lily
Family: Liliaceae
Element Code: PMLIL0D0W0
USDA Plants Symbol: CAMO2
Synonyms/Other Names:

  Conservation Status

CA Rare Plant Rank: 1A
Fed List: None
State List: None
Global Rank: GX
State Rank:
 SX
Other Status:
CRPR Changes:
Add Date: 1974-01-01
Date Edited: 2021-07-14

  Ecology and Life History

Lifeform: perennial bulbiferous herb
Blooming Period: Jun
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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 Total: 2
Total EOs % of EOs
EOs with Threat Listed: 1 100 %
THREAT LIST:
Grazing 1 100%
Non-native plant impacts 1 100%

  Occurrence Data from the CNDDB

Total Occurrences: 1
Element Occurrence Ranks:
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
Click on quad for name. Hold Shift Key to use mouse scroll wheel

  Selected References

Suggested Citation:
California Native Plant Society, Rare Plant Program. 2023. Rare Plant Inventory (online edition, v9.5). Website https://www.rareplants.cnps.org [accessed 4 June 2023].