Taxon Report

Calystegia sepium (L.) R. Br. ssp. binghamiae (Greene) Brummitt

Santa Barbara morning-glory

Print Report

Taxon Summary

Calystegia sepium ssp. binghamiae, commonly known as Santa Barbara morning-glory, is a perennial rhizomatous herb in the Convolvulaceae that is found only in California. It occurs within Marshes and swamps, growing at elevations from 5 to 5 meters. Calystegia sepium ssp. binghamiae is ranked 1A, Plants Presumed Extirpated in California and Either Rare or Extinct Elsewhere.

Classification


Scientific Name:	Calystegia sepium (L.) R. Br. ssp. binghamiae (Greene) Brummitt
Common Name:	Santa Barbara morning-glory
Family:	Convolvulaceae
Element Code:	PDCON040E6
USDA Plants Symbol:	CASEB
Synonyms/Other Names:

Ecology and Life History


Lifeform:	perennial rhizomatous herb
Blooming Period: Aug	Aug
Elevation:	5-5 (15-15)
General Habitats:	Marshes and swamps
Microhabitat:
Microhabitat Details:

Conservation Status


CA Rare Plant Rank:	1A
Global Rank:	G5TXQ
State Rank:	SX
State List:	None
Fed List:	None
Other Status:
CRPR Changes:	changed from 1B.1 to 1A on 2014-07-16 changed from 1A to 1B.1 on 2012-01-03

Occurrence Data from the CNDDB


Total Occurrences:	1
Element Occurrence Ranks:
Excellent (A)	0
Good (B)	0
Fair (C)	0
Poor (D)	0
None (X)	1
Unknown (U)	0

Location


California Endemic: True
California Counties and Islands: Name (Code)
Santa Barbara (SBA)*
Quads: Name (Quad Code)
Santa Barbara (3411946)*

Threat List Data from the CNDDB


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

Notes



Known only from the type locality in Santa Barbara from 1886; presumed extirpated from wetland modification and urbanization. Changed to CRPR 1B in 2011, when thought to have been rediscovered in Chino, but rediscovered plant was described as a new taxon, C. felix in 2013. Possibly a synonym of C. sepium ssp. limnophila. Native status in CA uncertain. See Bulletin of the California Academy of Sciences 2:417 (1887) for original description, Annals of the Missouri Botanical Garden 52(2): 219 (1965) for taxonomic treatment, and Phytokeys 32:1-26 (2013) for revised circumscription.
Threats:

Taxonomy:

Selected References

Proposed Rank Change from CRPR 1A to 1B.1 (2012)

Proposed Change from CRPR 1B.1, G5T1 / S1 to CRPR 1A, G5TXQ / SX (2014)

Citation California Native Plant Society, Rare Plant Program. 2025. Rare Plant Inventory (online edition, v9.5.1). Website https://www.rareplants.cnps.org [accessed 7 December 2025].