The difference between cleistogamy and chasmogamy is as follows:CleistogamyChasmogamyIn cleistogamy, pollination occurs in closed flowers.In Chasmogamy, pollination occurs in open flowers.The flowers are known as cleistogamous flowers.The flowers are known as chasmogamous flowers.Here, the plants only undergo self-pollination.Here, the plants may undergo cross-pollination or self-pollination.This type of pollination does not depend on pollinators or any other external factors.This type of pollination depends on pollinators and external factors.Example- CommelinaExample- Hibiscus