What happens to cactus flowers?

Cactus flowers tend not to be long blooming. Some cactus plants have night flowering blooms. Others have day flowering blossoms. Either way, the flowers need to be pollinated. Once pollinated, the flowers wither and develop the ovary. From the ovary develops the fruit, which produces cactus seeds. The seeds may be used by the cactus to feed the available wildlife and to reproduce.