Continuing the separation of alkaloids from the seeds of Lolium cuneatum, two new alkaloids were isolated: lolinine N-oxide (I, C₁₀H₁₆N₂O₃) and N-formylnorloline (II, C₈H₁₂N₂O₂). The structure of (I) was confirmed by NMR spectroscopy, solubility characteristics, reduction with zinc in hydrochloric acid (yielding lolinine and trace loline), and comparison with synthetic lolinine N-oxide. The structure of (II) was established via IR/mass spectrometry, hydrolysis to norloline, and matching with synthetic N-formylnorloline. Additionally, from base fractions of Colchicum kesselringii Rgl. and Merendera iolantae E. Czerniak, a new base iolantinine (I, C₁₈H₂₃O₄N, M⁺ 315) was isolated. Its structure was analyzed using UV (λmax 215, 287 nm), IR (3380 cm⁻¹ for active hydrogen, 1640 cm⁻¹ for carbonyl, 1600 cm⁻¹ for benzene ring C=C, 1460 cm⁻¹ for methylene), PMR (O-methyl and isolated benzene proton singlets), and chemical methods (acetylation, methylation, dioxime formation). Iolantinine was assigned to the group of alkaloids with a homoproaporphine carbon-nitrogen skeleton from colchicine-containing Liliaceae species.