Species Details

Calochortus dunnii

Dunn's mariposa-lily

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Classification

Scientific Name: Calochortus dunnii Purdy
Common Name: Dunn's mariposa-lily
Family:	Liliaceae
Element Code:	PMLIL0D0C0
USDA Plants Symbol:	CADU
Synonyms/Other Names:

Conservation Status

CA Rare Plant Rank:	1B.2
Fed List:	None
State List:	CR (1979-11-01)
Global Rank:	G3
State Rank:	S3
Other Status:	BLM_S; SB_CalBG/RSABG; SB_CRES; USFS_S
CRPR Changes:
Add Date:	1974-01-01
Date Edited:	2024-05-09

Ecology and Life History

Lifeform: perennial bulbiferous herb

Blooming Period: (Feb)Apr-Jun

Elevation:
185 - 1830 meters
605 - 6005 feet

General Habitats:

Closed-cone coniferous forest
Chaparral
Valley and foothill grassland

Microhabitat Details: Sometimes metavolcanic

Microhabitat:

Gabbroic (sometimes)
Rocky

Notes

Notes: Threatened by development, non-native plants, and vehicles. See Proceedings of the California Academy of Sciences III 2:147 (1901) for original description.
Threats:
Taxonomy:

Threat List Data from the CNDDB

THREAT LIST:
Threat List Total:	9
	Total EOs	% of EOs
EOs with Threat Listed:	15	39 %
Non-native plant impacts	5	13%
Foot traffic/trampling	4	10%
Other	4	10%
Road/trail construction/maint.	3	7%
Recreational use (non-ORV)	2	5%
ORV activity	2	5%
Grazing	1	2%
Improper burning regime	1	2%
Development	1	2%

Occurrence Data from the CNDDB

Element Occurrence Ranks:
Total Occurrences:					38
A	B	C	D	X	U
4	13	3	0	0	18

Occurrence Status:
Historical >20 Years	11
Recent <=20 Years	27

Presence:
Presumed Extant	38
Possibly Extirpated	0
Presumed Extirpated	0

Location

California Endemic:

California Island:

States: Name (Code)
Baja California (BA), California (CA)

California Counties and Islands: Name (Code)
San Diego (SDG)

Quads: Name (Quad Code)
Barrett Lake (3211666), Cuyamaca Peak (3211685), Descanso (3211675), Dulzura (3211667), Jamul Mountains (3211668), Julian (3311615), Morena Reservoir (3211665), Otay Mesa (3211658), Otay Mountain (3211657), Tecate (3211656), Tule Springs (3211686), Viejas Mountain (3211676), Warners Ranch (3311626)

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