Calystegia subacaulis subsp. episcopalis
Cambria morning-glory, Cambria Morning-Glory
(c) D Defreese, some rights reserved (CC BY) · licence
Family: Convolvulaceae · Type: Vine · Native
Conservation status: CNPS 4.2
Calystegia subacaulis subsp. episcopalis (Cambria morning-glory) is a native California vine in the Convolvulaceae family, recognized by lack of basal rosette and narrow bracts.
Cambria morning-glory is a California native perennial found in central San Luis Obispo County in dry, open scrub and woodland habitats at elevations below 500 meters. Flowering from April to June, this plant produces white to pink flowers with delicate, softly curved petals. Growing with decumbent to ascending stems about 20 centimeters long and generally covered in minute appressed hairs, it has a distinctive appearance. Its leaves are uniquely shaped, generally triangular to kidney-like, with broadly rounded or truncate lobes that extend approximately laterally. The plant's bracts are lanceolate and acute, measuring around 12 millimeters long and 4 millimeters wide.
Identification and appearance
Key characters: 13 sympatric species; distinguished by lack of basal rosette and narrow bracts
Habitat and range
Habitat: Dry, open scrub, woodland
Elevation: < 500 m
California counties: San Luis Obispo, Santa Clara, Santa Barbara, Monterey, Alameda, Sonoma
Bloom period
Calystegia subacaulis subsp. episcopalis blooms Apr-Jun.
Conservation status
CNPS 4.2
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 subacaulis subsp. episcopalis native to California?
Yes. Calystegia subacaulis subsp. episcopalis is native to California (recorded as native).
When does Calystegia subacaulis subsp. episcopalis bloom?
Calystegia subacaulis subsp. episcopalis blooms Apr-Jun.
Where in California does Calystegia subacaulis subsp. episcopalis grow?
Calystegia subacaulis subsp. episcopalis occurs in San Luis Obispo, Santa Clara, Santa Barbara, Monterey, Alameda, Sonoma, at elevations of < 500 m.
What plant family does Calystegia subacaulis subsp. episcopalis belong to?
Calystegia subacaulis subsp. episcopalis is in the Convolvulaceae family, genus Calystegia.
Is Calystegia subacaulis subsp. episcopalis rare or endangered?
Calystegia subacaulis subsp. episcopalis carries California Rare Plant Rank 4.2, state rank S2?.
Related species
Other California species in the same genus, family, or bioregion.
- Calystegia subacaulis subsp. subacaulis
- Calystegia vanzuukiae — Van Zuuk's morning-glory
- Calystegia atriplicifolia subsp. buttensis — Butte county morning-glory
- Calystegia collina — Coast range false bindweed
- Calystegia collina subsp. collina
- Calystegia collina subsp. oxyphylla — Mount saint helena morning-glory
- Convolvulaceae sp. — Morning-glory family
- Convolvulus althaeoides — Hollyhock bindweed
Sources: Jepson eFlora · CNPS Rare Plant Inventory · Index of California Plant Names · 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.