Köhler's Medicinal Plants (or, Köhler's Medizinal-Pflanzen) is a German herbal written principally by Hermann Adolph Köhler (1834–1879, physician and chemist), and edited after his death by Gustav Pabst. The work was first published in the late 19th century by Franz Eugen Köhler of Gera. Its complete title is Köhler's Medizinal-Pflanzen in naturgetreuen Abbildungen mit kurz erläuterndem Texte : Atlas zur Pharmacopoea germanica, austriaca, belgica, danica, helvetica, hungarica, rossica, suecica, Neerlandica, British pharmacopoeia, zum Codex medicamentarius, sowie zur Pharmacopoeia of the United States of America. Source: Wikipedia (en)