• (n.) The condition of certain species of plants, in which the stamens and pistil do not mature simultaneously, so that these plants can never fertilize themselves.
(from the article `pollination`) ...pistils), a common way of preventing self-fertilization is to have the pollen shed either before or after the period during which the stigmas on ... Most sponges reproduce sexually, although asexual reproduction may occur. Sponges are generally hermaphroditic (male and female germ cells in one ... ...
Di·chog'a·my noun [ Greek ... in two, asunder + ... marriage.] (Botany) The condition of certain species of plants, in which the stamens and pistil do not mature simultaneously, so that these plants can never fertilize themselves. 
Stamens and pistils maturing at different times.
dichogamy, dichogamous The condition in which the stamens and pistils (or analogous organs) of a hermaphrodite plant mature at different times.
a dichogamous condition.