Steroidal saponins, possible precursors for cortisone synthesis, have been found to be absent in Crotalaria spectabilis Roth. Qualitative results were obtained for flavonols, alkaloids, tannins, unsaturated sterols, and organic acids. A characteristic infrared spectrum has been established for the toxic alkaloid, monocrotaline. The results of a routine drug analysis have been reported. © 1956 The New York Botanical Garden.