Taxonomic Value of Flavonoids in the Species of the Genus Populus L .in Iraq

The work presented in this paper was undertaken to identify the Flavonoids with their glycosides in leaves and terminal flowering stems of five wild and cultivated Species of Populus L .in Iraq. Materials were collected from different habitat. Thin layer chromatography (T.L.C) technique was used for identification. Seven Flavonoid compounds were identified then were: Myricetine, Lutcolin-7- glucoside, Quercetin-3- rhamnoside, kaempferol, Apigenin, kaempferol-3- glucoside and Quercetin-3- glucoside. Results revealed that flavonoid compounds could have a good taxonomic value in this genus. The Species P. deltoids L . and P. xeuamericana clearly distinguished from the others, by the production of Myricetine, Quercetin-3- rhamnoside and Kaempferol.