Bracteoles 2, enlarged, enclosing the calyx. Capsule 1 or incompletely 2-locular

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Leaves reniform or rounded-cordate, 2–5 cm wide, glabrous. Corolla purplish, 30–50 mm long. Stems trailing or slightly twining. Coastal sand dunes. Fl. spring–summer Calystegia soldanella

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Leaves not reniform