Question

What are Cleistogamous flowers?

Answer 1

Hello PIB


Cleistogamous flowers are those flowers which do not open at all they remain closed always.As they do not open so chances of cross pollination is null hence they undergo only self pollination.

Cleistigamy prevents autogamy and geitenogamy both.


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Answer 2

Answer for Class 12 Biology Students

Cleistogamous flowers  do not open at all. In such flower, anther and stigma lie close to each other. Pollen grains come in contact with stigma resulting in pollination. Thus these are strictly autogamous as there is no chance of cross pollination. Some plants such as Viola, Commelina and Oxalis, have both types of flowers, chasmogamous as well as cleistogamous.

Note: Chasmogamous are open flowers with exposed anthers and stigma.

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