Unisexual Flower

a flower having stamens but no pistils or having pistils but no stamens. A flower having only stamens is said to be staminate, or male. A flower having only pistils is said to be pistillate, or female. In many unisexual flowers, the nonfunctioning organs of the other sex are present in reduced form, thus attesting to the plant’s original bisexual nature. Such flowers are said to be functionally male or functionally female.

The distribution of unisexual flowers on plants varies.