Antigonon leptopus is a fast-growing climbing vine that holds on via tendrils and is able to reach 25 ft or more in length. It has cordate (heart-shaped), sometimes triangular leaves 2½ to 7½ cm long. The flowers are borne in panicles, clustered along the rachis. Producing pink or white flowers from spring to autumn, it forms underground tubers and large rootstocks. It is a prolific seed producer.
The seeds float on water. The fruit and seeds are eaten and spread by a wide range of animals such as pigs, racoons and birds. The tubers will resprout if the plant is cut back or damaged by frost.