Acacia (Abrus? Precambrian: Leguminosae Wood vines. The branches are thin and weak. Flowers in spring and summer, butterfly-shaped corolla, often with red or purple, racemes. The pod is rectangular. The seeds are broadly ovoid with vermilion at the top and black at the bottom. Distributed in tropical Asia; Also produced in southern China. The scientific name of this kind of seed is the mother bead of hen, which is very toxic and is often used as Chinese herbal medicine.