<jats:p> The plant investigated has been found to contain at least five alkaloids, three of which, l-sparteine, d-lupanine, and d-α-isolupanine, are of known structure. The remaining two are both isomeric with hydroxylupanine. One of these, lupilaxine, was identical with a base previously reported as occurring in Lupinuslaxus. The other, lupanoline, appeared to be new. Both these alkaloids were shown by their infrared absorption spectra to contain, like hydroxylupanine, one hydroxyl group and one carbonyl.