The American Materia Medica, Therapeutics and Pharmacognosy, 1919, was written by Finley Ellingwood, M.D. Nux Vomica. Strychnos nux vomica. Ignatia Amara. Strychnos ignatia. Capsicum. Capsicum frutescens. Zanthoxylum. Zanthoxylum americanum. Zanthoxylum clava-herculis. Sumbul. Ferula sumbul. Book Navigation ‹ Division II. Stimulants and excitants. up Nux Vomica. Strychnos nux vomica. ›