FLOS MASCLUSUS, in botany, a flower which contains the stamen, reckoned by the sexualists the male organ of generation; but not the stigma or female organ. All the plants of the class dicœcia of Linnaeus have male and female flowers upon different roots: those of the class monocœcia bear flowers of different sexes on the same root. The plants, therefore, of the former are only male and female: those of the latter are androgynous; that is, contain a mixture of both male and female flowers.