Mature flowers of Cannabis sativa. Male Cannabis flowers have sepals and stamens (a) while female Cannabis flowers consist of two carpels enclosed by a perigonal bract (c). Schematic depiction of the structure of Cannabis male flower (b) and female flower (d). The bar = 1 mm. an, anther; b, perigonal bract; fi, filament; s, sepal; ov, ovary; p., perianth; stg, stigma; sty, style.