Why are red beans called acacia beans?

Red bean is a plant name, also called acacia. As the sustenance of acacia, it has existed since ancient times. When those red berries come in spring, they flush on the branches of your southern country. Take them home for me as a symbol of our love. The five-character quatrain "Acacia" by Wang Wei, a famous poet in the Tang Dynasty, made red beans the most famous acacia beans. Therefore, I don't know how many people have sent acacia beans throughout the ages. When relatives and friends leave home, they always bring a acacia bean to their relatives to express their thoughts. Lovers also send acacia beans to each other as tokens of love.

"Materia Medica" contains: "Acacia, a red bean." Qing Yu Biyun said: "Red beans are acacia. I hope you can pick them to increase your feelings after parting." Yuan Zhen's poems in a secluded country show a single-minded hospitality. "Guo Moruo once studied the famous red beans written by Wang Wei. As a result, he found a plant called sea red beans in Dinghushan. Its fruit ripens in autumn, and its seeds naturally jump out of its shell, which is vermilion and looks like a beating heart. Southerners are used to calling acacia, acacia and sea red beans red beans.

Acacia (Abrus precatorius L.), also known as red bean and vine, has thin and branched stems. Pinnate compound leaves; Leaflets 8- 13 pairs, membranous, opposite, nearly oblong. Racemes axillary, 3-8 cm long; Inflorescence axis thick and short; Flowers are small, dense and head-shaped; Calyx bell-shaped, calyx teeth 4-lobed, thick white; Corolla purple, flag handle triangular, wing flap and dragon bone flap narrower. The pod is oblong, the petals are leathery, cracking at maturity, and there are 2-6 seeds; The seeds are oval, smooth and shiny, with about two-thirds bright red on the upper part and about one-third black on the lower part. The flowering period is from March to June, and the fruiting period is from September to June.

It is a poisonous plant of Acacia in Leguminosae, which is widely distributed in tropical areas. The seeds contain a kind of protein called acacia, which is very toxic. Eating by mistake will lead to poisoning and even death in severe cases. Seeds can be made into beaded ornaments and percussion instruments; There is also a folk custom in Taiwan Province Province, which is to add stems to tea to increase the aroma.