Flavonoids from Casearia sylvestris Swartz variety lingua (Salicaceae)

• Flavonoids from the leaves of C. sylvestris var. lingua were identified for the first time.
• Five flavonoids were isolated by preparative HPLC and were identified by HRMS, MS/MS, and NMR.
• Ten other flavonoid O-glycosides were identified by HRMS and MS/MS.
• The occurrence of flavonoids in the genus Casearia is discussed.