Fagara mayu (Bert. ex Hook. et Arn.) Engler is the most abundant tree in the rain forest of Robinson Crusoe Island. An earlier publication showed its trunk bark contains the tetrahydrobenzylisoquinoline-derived chelerythrine and magnoflorine, the anthranilic acid-derived canthin-6-one and the furanoquinolines skimmianine, dictamnine and γ-fagarine, and an unidentified slightly laevorotatory alkaloid melting at 139-140°, apparent MW 273 (MS). The leaves of F. mayu also contain a small amount of alkaloids (0.1%). This paper reports the separation and identification of these leaf alkaloids as skimmianine, (-)-edulinine, and ribalinine. The unidentified bark alkaloid is probably (-)-edulinine. To the best of our knowledge, no other member of the Zanthoxylum/Fagara complex has been shown to contain edulinine or ribalinine, and the accumulation of these uncommon offshoots of the main biogenetic route to furanoquinoline alkaloids may be of some taxonomic significance, as F. mayu is the only member of this group which is known to synthesize a linear pyranoquinolone. For Chelidonium japonicum Thunb, the presence of several alkaloids in root and aerial parts have been reported by Slavik on the basis of TLC and PC evidence. This study reports isolation and identification of its alkaloids: the basic CHCl3 soluble fraction gave two compounds identified as norsanguinarine and norchelerythrine respectively by UV, NMR, and MS (confirmed by direct comparison with authentic samples); elution with CHCl3-EtOAc afforded a compound identified as bocconoline (isolated from Bocconoria cordata) based on spectral data and the characteristic loss of a substituent at C6 in MS as suggested by Slavik et al.