Calystegia sepium
Bracteoles narrow-ovate to ovate, c. 1 cm wide, flat but very slightly keeled at the base, not inflated, not overlapping at flowering. Leaves ovate-cordate to lanceolate, hastate, acute-acuminate, mostly 5–10 cm long. Prostrate or twining herb. Coast. Weed of cultivation and waste places. Fl. spring–summer