(Left) functional male flower of Echinocereus coccineus (Cactaceae) showing pollen-filled anthers surrounding the base of the stigma lobes. (Right) Functional felmale flower of E. coccineus from a different plant showing reduced filaments and empty anther sacs held below the stigma lobes.
Additional data
copyright: M. Timm Hoffman, BSA
license: http://images.botany.org/index.html#license