Question

What are chasmogamous flower? Can cross-pollination occur in cleistogamous flowers? Give reason for your answer.

Answer 1

There are two types of flowers present in plants namely Oxalis and Viola-chasmogamous and cleistogamous flowers.

Chasmogamous flowers have exposed anthers and stigma to the flowers of other species. Cross-pollination cannot occur in cleistogamous flowers. This is because cleistogamous flowers never open at all.
Also, the anther and the stigma lie closed to each other in these flowers.
Hence, only self-pollination is possible in these flowers.