vines, perennial. 1.5 m tall. Flowers July-Aug Petiole 2-7 cm, glabrous; leaf blade narrowly deltate to deltate-cordate, 3-13 × 3-10 cm, papery, both surfaces glabrous, veins palmate, 2-3 pairs from base, base cordate, sinus ca.Fr.Sep-Oct.
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