Phytochemistry and molecular systematics of Triaenophora rupestris and Oreosolen wattii (Scrophulariaceae)

The relationships between the genera Triaenophora, Oreosolen and Rehmannia have been investigated. The content of iridoid glucosides in Triaenophora and Rehmannia were almost identical while Oreosolen wattii was different. These results are consistent with a phylogenetic tree based on DNA sequencing.