54. Arum.—Indian Turnip.
54. ARUM.—INDIAN TURNIP. The corm of Arisae'ma (Arum) triphyllum Torrey (Jack-in-the-pulpit or wake-robin). Habitat: North America, in rich woods. Depressed-globular, about 25 to 50 mm. (1 to 2 in.) in diameter, covered with a loose, wrinkled, brown epidermis; it often comes into market in white, starchy, transverse slices; inodorous; very acrid. This acrid principle is volatile, the fully dried corm being nearly inert. Arum has been used as a stimulant to the secretions in asthma, whooping-cough, chronic catarrh, and rheumatism. Dose: 8 to 15 gr. (0,5 to 1 Gm.).