Convolvulus, a large genus of trailing or twining plants. It includes several kinds of morning glory, the sweet potato, and the common bindweed. About 15 species are found in the western and southern United States.
The dwarf morning glory is a small convolvulus with funnel-shaped blue flowers with yellow throats. The blossoms are about one inch (2.5 cm) wide. Field bindweed is a creeping pest with flowers like small pink morning glories about an inch wide. Hedge bindweed has flowers nearly twice the size of those of the field bindweed. Both weeds are hard to kill.
The family is Convolvulaceae. Dwarf morning glory is Convolvulus tricolor; field bindweed is C. arvensis; hedge bindweed is C. sepium.