Zanthoxylum clava-herculis

Zanthoxylum clava-herculis, Hercules' club (or Hercules-club), pepperwood, or southern prickly ash, is a spiny tree or shrub native to the southeastern United States. It grows to 10–17 m tall and has distinctive spined thick, corky lumps 2–3 cm long on the bark. The leaves are glabrous and leathery, pinnately compound, 20–30 cm long with 7-19 leaflets, each leaflet 4–5 cm long. The flowers are dioecious, in panicles up to 20 cm long, each flower small, 6–8 mm diameter, with 3-5 white petals. The fruit is a two-valved capsule 6 mm diameter with a rough surface, and containing several small black seeds. The tree has also been called Z. macrophyllum. The genus name is sometimes spelled Xanthoxylum.
Along with the related Zanthoxylum americanum, it is sometimes called "toothache tree" or "tingle tongue" because of the numbness of the mouth, teeth, and tongue induced by chewing on its leaves or bark (thus...