an alkaloid derived from theplant Duboisia myoposides, N.O. Sofanaceae, anative of Queensland and New South Wales. It is used inmedicine as an application to the eye for the purpose ofcausing the pupil to dilate, in the same way as atropine, analkaloid obtained from the belladonna plant in Europe, has longbeen employed. Duboisine was discovered and introduced intotherapeutics by a Brisbane physician.