Calystegia marginata

Glabrous, twining perennial. Leaves ovate to lanceolate, 3–10 cm long, 1.5–8 cm wide, apex acuminate, base sagittate to hastate, margins undulate, basal lobes toothed or shallowly lobed; petiole 2–8 cm long. Flowers with peduncles to c. 8 cm long, equal to or shorter than the petioles; bracteoles more or less orbicular, 6–10(–12) mm long, apex rounded to emarginate, often minutely mucronate, equal to or longer than calyx; sepals 5–7 mm long; corolla c. 2 cm long, white to pale mauve. Capsule globose, 5–7 mm long. Flowers spring and summer.