dichogamy

from The Collaborative International Dictionary of English v.0.48
Dichogamy \Di*chog"a*my\, n. [Gr. ? in two, asunder + ?
   marriage.] (Bot.)
   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.
   [1913 Webster]
    

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