This work is a taxonomic study on flavonoids in the leaves of selected species belonged to family Malvaceae. These species considered as: Abelmoschus esculentus, Hibiscus sabdariffa and Gossypium barbadense. These species distributed in different localities in Sudan. The selected members have nutritive, medicinal and economic importance, extra of that, the present study included botanical and chemical studies. The collected species have been updated due to nomenclature and synonymy. The geographical distribution of the selected members has been indicated. The chemical studies included identification of the flavonoid compounds using Gas Chromatography Mass Spectrophotometer (GC-MS). Eighty-three flavonoid compounds were detected in the leaves of family Malvaceae. The highest number (36) was detected in the leaves of Abelmoschus esculentus. Five flavonoid compounds were identified as taxonomic markers for the leaves of Hibiscus sabdariffa. Thirteen flavonoids were restricted only to the leaves of Gossypium barbadense.