Dendrocnide meyeniana

Dendrocnide meyeniana, the poisonous wood nettle, is a species of tree in the family Urticaceae, native to the thickets and secondary forests of Taiwan and the Philippines. The specific epithet meyeniana honors Franz Meyen, who collected the type specimen in Manila during his world cruise. In the Philippines, the city of Lipa in Batangas is named after this plant. Locals distinguish it primarily by the short stinging hairs on its twigs. In Taiwanese Mandarin, it is widely known as yǎoréngǒu, a name which has been used since the early Qing period referring to the skin irritation or inflammation its stinging hairs may cause. Among the Paiwan people, and Puyuma people of Taiwan, both ethnic groups have the custom of whipping adolescents with the plant as a rite of passage or a corporal punishment....read more on Wikipedia.