Alkaloidal components in the tree bark of Formosan Hernandia ovigera L. (Hernandiaceae) were examined and thalicarpine (W), xanthoplanine (V), and a new aporphine-type alkaloid, hernovine were isolated. Hernovine, m.p. 143~145° (sint. 130°), C18H15O4N, was proved to have the structure represented by formula (1) from the measurement of ultraviolet spectrum (Fig. 1) and NMR spectrum.