According to the "New Yunnan Tongzhi And Property Examination", "The old name of the lingjiao is Qi, which belongs to the family Aphididae. In ancient times, it was also said that the lotus was also known, and the lingling was also seen in the songs, and the common plants in the cover pond swamp were also. Leaves emerge in spring, broadly ovate and serrated. The middle of the petiole is enlarged and facilitates floating. In summer, small white flowers bloom with four sepals and four petals. The ovary ripens in autumn and becomes a nut with tender spines in the horns. The flesh is white and tender and can be eaten raw.
"Dali Thorn Lingjiao is mainly produced in major freshwater lakes such as Erhai, West Lake, Jian Lake, huabi lake and so on. Each spring, it sprouts long leaves, the leaves are floating on the water, the leaf edges are serrated, and the middle of the petiole is more fat than the two ends; in summer, the flowers are small and white, with four petals. Autumn high and refreshing season, the water diamond is tired, is the season of picking diamond horn, at this time the diamond horn outer skin is hard and has tender thorns, the fresh diamond horn picked is rinsed clean, and then boiled in boiling water for a while, the shell can be eaten; at this time, the diamond horn flesh is white and tender, the food is sweet, and it is a common favorite food of the Bai people.