Wu Tong evergreen tree, also known as "Eichhornia crassipes", has long oval leaves; Flowers in early summer, no corolla, pink calyx, panicle; The fruit is divided into four or five sub-fruits, with a deep red outside and a black aftertaste. Seeds are edible and taste like chestnuts when cooked. Native to China, Indian, Vietnamese, Indonesian and other places, it is often planted as a garden tree species in southern Guangdong, China, with light and tough wood, which can be used to make utensils.