Laurolitsine (II) was isolated from the root of Lindera strychnifolia (SIEB. et ZUCC.) F. VILL. (Japanese name "Tendai-uyaku"), a Lauraceous plant, and launobine (V) was isolated from the bark and wood of Lindera umbellata THUNB. (Japanese name "Kuromoji"). The structures of these alkaloids were identified through spectral analyses (UV, NMR, IR), preparation of derivatives (e.g., O,O,N-triacetyllaurolitsine from laurolitsine and N-methyllaunobine (d-bulbocapnine) from launobine), and comparisons with authentic samples (mixed melting point determination and IR spectroscopy). Both alkaloids were confirmed to be aporphine-type secondary bases. The yield of laurolitsine (II) picrolonate from fresh roots was approximately 10 times higher than that from Chinese crude drugs, presumably due to the degradation of laurolitsine (II) (an unstable base susceptible to air oxidation) during the preparation and storage of crude drugs. Studies on the remaining phenolic and non-phenolic alkaloid fractions are ongoing.