Ipomoea aquatica (water spinach; 蕹菜; wèngcài) semi-aquatic with hollow stems and long, lance-shaped leaves. Known as kangkong in South-East Asia, sold as "Ong Choy" or "On Choy" in West Coast North American Chinese markets.
Malabar spinach, (落葵; luòkuí) with thick, succulent, heart-shaped leaves