A climber up to 20 m long, with terete, slightly furrowed branches up to 5 mm in diameter. Leaves are simple, oval to oblong, 6- 25 cm long by 4-10 cm wide, tip abruptly pointed, base deeply heart- shaped and alternately arranged. Flowers are bisexual, with three perianths that unite into a slender tube of about 7 cm long. Fruits are globular capsule of 3.5 cm diameter on a 2.5 cm stalk. |