The flavonol glycosides characterized from the branches of Carya pecan include three new compounds, azaleatin 3-glucoside azaleatin 3-diglycoside and caryatin 3'- (or 4'-) rhamnoglucoside, together with azaleatin 3-rhamnoside. In the leaf tissue, quercetin 3-glucoside, quercetin 3-galactoside, quercetin 3 rhamnoside, quercetin 3-arabinoside and a small amount of kaempferol 3-monomethyl ether were identified.Azaleatin and caryatin have been previously identified from the bark of Carya pecan [1,2]. Five glycosides of azaleatin have been reported from other plant sources [3]. Two new azaleatin glycosides, the 3-arabinoside and the 3-rutinoside together with caryatin 3' (or 4'-) glucoside, have been recently characterized in the branches of C. pecan [4]. Trace amounts of a number of other glycosides were also detected, but could not be identified at that time. In the present study, a larger sample of branch tissue has been reinvestigated, and the flavonols of the leaves also studied. In addition to the previously mentioned glycosides [4], the branches were also found to contain the following glycosides: azaleatin 3-glucoside, azaleatin 3-rhamnoside, azaleatin 3-diglycoside and caryatin 3' (or 4'.) rhamnoglucoside. This is the first report of azaleatin 3 glucoside and caryatin 3' (or 4'-) rhamnoglucoside in nature. In the leaf tissue quercetin 3-glucoside, 3 galactoside, 3-arabinoside and 3-rhamnoside, and a trace amount of kaempferol 3-monomethyl ether were characterized.