Aucubinartige glucoside als systematische merkmale bei labiaten — II. Galeopsis

All species of Galeopsis contain aucubin-like glycosides in roots, leaves and seeds. Acetylharpagide is typical of leaves of the species of the subgenus Ladanum and galiridoside characterizes leaves of taxa of the subgenus Tetrahit. However, the leaves of Galeopsis pubescens, G. segetum and G. pyrenaica contain appreciable amounts of both constituents. In roots and seeds, the difference between the two subgenera is less striking. However, roots of species of subgenus Tetrahit are characterized by a third constituent, called bifida-substance. Some chemical characters of Galeopsis are discussed and evaluated systematically. Galeopsis resembles Lamiastrum in leaf aucubinoids.