Calystegines as chemotaxonomic markers in the Convolvulaceae

A GC-MS study of 129 convolvulaceous species belonging to 29 genera and all 12 tribes revealed the occurrence of calystegines in 62 spp. belonging to 22 genera and 11 tribes. In addition, the presence of their putative precursors (lipophilic basal tropanes) has been checked.