Both, autogamy and geitonogamy are prevented in
papaya
cucumber
castor
maize.
Name the type of pollination in self-incompatible plants.
Explain what are outbreeding devices. Give its importance.
In papaya male and female flowers are present on different plants. It permits
$A$ : Continued self-pollination checks inbreeding depression.
$R$ : Pollen release and stigma receptivity are synchronised.
Flowers preventing self-pollination is called