Oleander: Evergreen shrub with pink or white flowers, widely distributed, and its leaves, flowers and bark are poisonous. (I have seen it personally. I liked to pick its flowers for fun when I was a child. Now there are many oleanders in the place where I study, so I can only appreciate it and dare not do it again.) 2. Digitalis: also known as Digitalis purpurea, a herb, is cultivated everywhere. The whole column is covered with short hair, the leaves are oval, and they bloom in early summer, facing one side, and their leaves are poisonous. 3. Lily of the Valley: Herb, wild in the mountains of northeast and north, with bell-shaped flowers, fragrant white and poisonous whole grass. 4, poisonous hairy convolvulus: also known as Jatropha curcas, shrub, cultivated in Yunnan and Guangdong, China, the flowers are yellow, with purple spots, white milk, and the whole plant is poisonous.