Dichogamy, Protandry, Protogyny
dichogamy: the maturation of male and female reproductive organs of a flower at different times
protandry: having male reproductive organs maturing before the female
protogyny: having female reproductive organs maturing before the male
One cross-pollination strategy that bisexual plants (those with flowers having both stamens and pistils) use is dichogamy, where the stamens and pistils of a flower mature at different times.