Seeds. Toothache Tree, Texas Prickly Ashe (Zanthoxylem hirsutum).

Texas Prickly Ashe (Zanthoxylem hirsutum), is an interesting Texas native in that all parts of this plant produce a substance that when chewed makes your mouth tingly and numb. Hence one common name of Toothache Tree. Seeds require 2 months of after-ripening and 1 month in cold moist stratification.