Why Can't Some Flowers Grow into Fruit?

Some plants bloom with both male and female flowers. The female ones have an ovary, while the males do not, which means they cannot bear fruit. Most of the flowers blooming in early summer are male and they wither not long after they've bloomed. As a result people call

them "flashing flowers." The fact that the male flowers do not bear fruit does not mean they are useless. They have pollen, which will be carried by insects, especially by bees, to the female flowers. The ovaries of the female flowers grow into fruit only after they receive the pollen.