Eichhornia crassipes, also known as "Eichhornia crassipes", has long oval leaves: flowering in early summer, no corolla, pink flowers, panicles: the fruit is divided into four or five schizocarps, with dark red outside and black finish. 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 in the south of Guangdong, China, with light and tough wood, which can be used to make utensils. In Guangdong custom, the fruit of Eichhornia crassipes is a sacrifice for the seventh sister's birthday. If there is no fruit, it will be replaced by fake fruit of Eichhornia crassipes. Due to the small annual output of Eichhornia crassipes and the decline of sacrificial customs, orchards that are rarely planted in large quantities are only planted sporadically.