Taxon Report

Calystegia collina (Greene) Brummitt ssp. venusta Brummitt

South Coast Range morning-glory

Print Report

Taxon Summary

Calystegia collina ssp. venusta, commonly known as South Coast Range morning-glory, is a perennial rhizomatous herb in the Convolvulaceae that is found only in California. It occurs within Chaparral, Cismontane woodland, and Valley and foothill grassland, growing at elevations from 270 to 1490 meters. Calystegia collina ssp. venusta is ranked 4.3, Plants of Limited Distribution, A Watch List; Not very threatened in California.

Classification


Scientific Name:	Calystegia collina (Greene) Brummitt ssp. venusta Brummitt
Common Name:	South Coast Range morning-glory
Family:	Convolvulaceae
Element Code:	PDCON04034
USDA Plants Symbol:	CACOV
Synonyms/Other Names:

Ecology and Life History


Lifeform:	perennial rhizomatous herb
Blooming Period: Apr-Jun	Apr-Jun
Elevation:	270-1490 (885-4890)
General Habitats:	Chaparral, Cismontane woodland, Valley and foothill grassland
Microhabitat:	Serpentine (sometimes)
Microhabitat Details:	sometimes sedimentary

Conservation Status


CA Rare Plant Rank:	4.3
Global Rank:	G4T4
State Rank:	S4
State List:	None
Fed List:	None
Other Status:
CRPR Changes:

Occurrence Data from the CNDDB


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

Location


California Endemic: True
California Counties and Islands: Name (Code)
Fresno (FRE), Monterey (MNT), San Benito (SBT), Santa Barbara (SBA), Santa Clara (SCL)
Quads: Name (Quad Code)
Bald Mountain (3411978), Bickmore Canyon (3612152), Cholame Valley (3512073), Curry Mountain (3612014), Figueroa Mtn. (3411968), Hepsedam Peak (3612037), Hernandez Reservoir (3612047), Idria (3612046), Llanada (3612058), Lonoak (3612038), Los Olivos (3412061), Monarch Peak (3612027), North Chalone Peak (3612142), Parkfield (3512084), Priest Valley (3612026), Rock Spring Peak (3612048), San Benito (3612151), San Benito Mtn. (3612036), Santa Rita Peak (3612035), Santa Teresa Hills (3712127), The Dark Hole (3512083), Villa Creek (3512174)

Threat List Data from the CNDDB


Threat List Total:	0
EOs with Threat Listed:	Total EOs	% of EOs
	0	0 %

Notes



Can be relatively abundant and tolerant of disturbance. See Kew Bulletin 35(2):328 (1980) for original description.
Threats:

Taxonomy:

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 30 January 2025].