Calystegia sepium subsp. binghamiae
Santa barbara morning-glory, Santa Barbara Morning-Glory
Photo: parent species Calystegia sepium · no rights reserved · CC0
Family: Convolvulaceae · Type: Vine · Native
Conservation status: CNPS 1A
Calystegia sepium subsp. binghamiae (Santa barbara morning-glory) is a native California vine in the Convolvulaceae family.
Santa barbara morning-glory is a rare (CNPS 1A) California native perennial found in northern and central Southern California coastal regions in coastal marshes and riverbanks at elevations below 20 meters. Flowering from April to June, this plant produces large white flowers approximately 40 millimeters wide with delicate, spreading petals. Growing with glabrous to sparsely hairy stems that trail or climb, it forms dense patches in moist habitats. Its leaves have widely rounded sinuses with lobes that are nearly entire, featuring acute to slightly obtuse tips. The plant is characterized by distinctive bracts 8 to 12 millimeters long, which are narrower than the sepals and elliptically shaped.
Identification and appearance
Key characters: Geographically isolated species with no sympatric congeners
Habitat and range
Habitat: Coastal marshes, riverbanks
Elevation: < 20 m
Bloom period
Calystegia sepium subsp. binghamiae blooms Apr-Jun.
Conservation status
CNPS 1A
How to tell it apart
vs Convolvulus: Convolvulus has smaller flowers with sharply pointed stigma lobes; Calystegia stigma lobes are blunt.; vs Ipomoea: Ipomoea stigma is a single rounded knob; Calystegia stigma has two distinct flattened lobes.; vs Datura: Datura flowers are upright with pleated edges; Calystegia flowers are smooth funnels.; vs Abronia: Abronia has clusters of small tubular flowers; Calystegia has single large funnel flowers.; vs Oenothera: Oenothera has four separate petals; Calystegia petals are fused into continuous funnel.
Frequently asked questions
Is Calystegia sepium subsp. binghamiae native to California?
Yes. Calystegia sepium subsp. binghamiae is native to California (recorded as native).
When does Calystegia sepium subsp. binghamiae bloom?
Calystegia sepium subsp. binghamiae blooms Apr-Jun.
What plant family does Calystegia sepium subsp. binghamiae belong to?
Calystegia sepium subsp. binghamiae is in the Convolvulaceae family, genus Calystegia.
Is Calystegia sepium subsp. binghamiae rare or endangered?
Calystegia sepium subsp. binghamiae carries California Rare Plant Rank 1A, state rank SX.
What habitat does Calystegia sepium subsp. binghamiae grow in?
Calystegia sepium subsp. binghamiae grows in Coastal marshes, riverbanks.
Related species
Other California species in the same genus, family, or bioregion.
Sources: Jepson eFlora · CalPhotos · CDFW CNDDB
Last updated 2026-10-07
Data from The California Species Project — 14,000+ California species with verified data from CNPS, CDFW, USFWS, Cal-IPC, and more.