Cercestis mirabilis

Cercestis mirabilis is a perennial herb that can grow up to 11 feet tall. It is an obligate climber, which means that it requires support to grow. The stem is about an inch thick and can climb up to a height of 30 feet, rooting as it climbs. The leaves are simple, broad, and glabrous, with a terete petiole that is 3/4-2 feet long and grooved at the base in the adult plant. It is native to tropical Africa.