Leaves Leaves alternate spiral Often heart-shaped, oval or round shape with a 6-12 (-24) cm long, 7-14 (-25) cm long, tapering cone. The need is heart-shaped, deep or shallow, sheet-like body, usually on the bottom leaves are sometimes found on the skin between the base of the leaves flat. Leaves from the base line and a hand towel with a 3-5, 1-3 match nerves petiole 5-15 (-30) cm swelling and Elbow.