| Abstract: | Analysis of 16 flavonoids and 3 other phenols in 177 samples of the genusRhododendron was carried out by HPTLC silica gel plate-stepwise development andpolyamide thin layer. The result reveals that the presence of monoglycosides of quercetin is ageneral character of flavonoids in the Chinese rhododendrons; some taxa are characterized bypresence or absence of certain glycosides; although myricetin, and gossypetin are generallyrare in this genus, they are concentrated in some taxa, and therefore they are valuable inchemotaxonomy. The significance of quantitative and semi-quantitative assessment of chem-ical characters for chemotaxonomy of Rhododendron is also discussed. |
