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Dioecious (dioecious) plants always have unisexual flowers. Here in the picture male inflorescences ("catkins") of a willow ( Salix ).

Under Diklinie , gonochorism or Spatial segregation , is understood in the Botany generally, the spatial separation of the sexual organs in different flowers . If the two unisexual flowers found on a copy, it is called Einhäusigkeit (monoecious), they are not distributed to different individuals, it is called dioecious (dioecious). If the flowers are monoclinic , they are bisexual, i.e. hermaphroditic.

Dikline is supposed to prevent self-pollination because self-fertilization can lead to negative effects from inbreeding . Too much of your own pollen on the scar also reduces the likelihood that (desired) foreign pollen can germinate. Especially in wind-pollinated species , which produce a lot of pollen, the dikline is a common phenomenon.

If, on the other hand, the spatial separation takes place within a flower, it is called hercogamy .

If the male flowers of monocular, unisexual, diclinic plants ripen first, this is called metandry , if the female ones ripen first; Metagynia and when they mature at the same time; Synchronogamy . If metandric and metagynic occur in a plant species, this is called hetero dichogamy . The Homodichogamie referred to the presence of homogamous and dichogamen individuals in a species.


Individual evidence

  1. Karl Linsbauer (Ed.): Short dictionary of botany. 2nd Edition. Engelmann, 1917, archive.org .