Dig deeper at SERNEC, a consortium of southeastern herbaria.

The former Calystegia sepium has now been split out into several species, not to mention all now in the genus Convolvulus. Read more at Vascular Plants of North Carolina.

SYNONYMOUS WITH PLANTS NATIONAL DATABASE:
Calystegia sepium ssp. limnophila   FAMILY Convolvulaceae

INCLUDED WITHIN VASCULAR FLORA OF THE CAROLINAS (Radford, Ahles, & Bell, 1968) 158-06-002:

Calystegia sepium   FAMILY Convolvulaceae

INCLUDED WITHIN Britton & Brown Illus Flora of Northeast US & adjacent Canada (Gleason, 1952)

Convolvulus sepium var. sepium

COMMON NAME:
Coastal Plain Bindweed

NameThatPlant has no pictures at this time. You might try this link: Flora of the Southeastern United States

WEAKLEY'S FLORA OF THE SOUTHEASTERN US (10/20/20):
Convolvulus limnophilus   FAMILY Convolvulaceae

SYNONYMOUS WITH PLANTS NATIONAL DATABASE:
Calystegia sepium ssp. limnophila   FAMILY Convolvulaceae

INCLUDED WITHIN VASCULAR FLORA OF THE CAROLINAS (Radford, Ahles, & Bell, 1968) 158-06-002:
Calystegia sepium   FAMILY Convolvulaceae

INCLUDED WITHIN Britton & Brown Illus Flora of Northeast US & adjacent Canada (Gleason, 1952)
Convolvulus sepium var. sepium