Genus Zanthoxylum is a group of deciduous or evergreen trees and shrubs in the citrus family, Rutaceae. The genus Zanthoxylum is commonly referred to by its common names which are szechuan pepper and prickly ash. Other synonyms for genus Zanthoxylum include Chinese prickly ash, Japanese pepper, and mountain pepper. Zanthoxylum plants are known for their spiny branches, aromatic bark, and pungent fruits that are used in traditional medicine and cooking. The plants are native to Asia, North America, and South America and have been naturalized in many other parts of the world. The various species of Zanthoxylum are used for a wide range of culinary and medicinal purposes.