Species Details

Calystegia collina ssp. tridactylosa

three-fingered morning-glory

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Classification

Scientific Name: Calystegia collina (E.Greene) Brummitt ssp. tridactylosa (Eastw.) Brummitt
Common Name: three-fingered morning-glory
Family:	Convolvulaceae
Element Code:	PDCON04036
USDA Plants Symbol:	CACOT
Synonyms/Other Names:

Conservation Status

CA Rare Plant Rank:	1B.2
Fed List:	None
State List:	None
Global Rank:	G4T1
State Rank:	S1
Other Status:	BLM_S
CRPR Changes: added to 1B.2 on 2006-11-17
Add Date:	2006-11-17
Date Edited:	2023-06-06

Ecology and Life History

Lifeform: perennial rhizomatous herb

Blooming Period: Apr-Jun

Elevation:
0 - 600 meters
0 - 1970 feet

General Habitats:

Chaparral
Cismontane woodland

Microhabitat Details:

Microhabitat:

Gravelly
Openings
Rocky
Serpentine

Notes

Notes: Potentially threatened by geothermal energy development. May intergrade with Calystegia occidentalis ssp. occidentalis and Calystegia malacophylla ssp. malacophylla. See Proceedings of the California Academy of Sciences, series 4, 20: 151 (1931) for original description and Annals of the Missouri Botanical Garden 52(2): 214-216 (1965) for revised nomenclature.
Threats:
Taxonomy:

Threat List Data from the CNDDB

THREAT LIST:
Threat List Total:	2
	Total EOs	% of EOs
EOs with Threat Listed:	2	18 %
Development	2	18%
Road/trail construction/maint.	1	9%

Occurrence Data from the CNDDB

Element Occurrence Ranks:
Total Occurrences:					11
A	B	C	D	X	U
2	0	1	0	0	8

Occurrence Status:
Historical >20 Years	4
Recent <=20 Years	7

Presence:
Presumed Extant	11
Possibly Extirpated	0
Presumed Extirpated	0

Location

California Endemic:

California Island:

States: Name (Code)
California (CA)

California Counties and Islands: Name (Code)
Colusa (COL), Lake (LAK), Mendocino (MEN)

Quads: Name (Quad Code)
Brushy Mtn. (3912352), Covelo West (3912373), Dos Rios (3912363), Hull Mountain (3912258), Jamison Ridge (3912362), Leesville (3912224), Plaskett Ridge (3912268), The Geysers (3812277), Wilbur Springs (3912214)

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

CNPS Status Review:

Proposed Addition to CRPR 1B.2, G4T1 / S1.2 (2006)