What are cleistogamous & chasmogamous flowers?

What are cleistogamous flowers?

cleistogamous) refers to a flower in which the perianth remains closed, such that pollen produced from within the flower pollinates only the stigma(s) of that flower.

What is cleistogamous flower give example?

Cleistogamy is a type of automatic self-pollination of certain plants that can propagate by using non-opening, self-pollinating flowers. The flowers are intersexual. They remain closed causing self-pollination. Examples: Viola, Oxalis, Commelina, Cardamine.

What is cleistogamous flowers Class 12?

Cleistogamous flowers are flowers that do not open at all. Cleistogamy refers to the self-pollination which occurs in unopened flowers. Advantage of cleistogamy: … In other words, it can be said that cleistogamous plants can propagate itself under unfavorable conditions.

What is meant by cleistogamous?

Definition of cleistogamous

: characterized by or being small inconspicuous closed self-pollinating flowers additional to and often more fruitful than showier ones on the same plant violets are cleistogamous.

Is pansy cleistogamous or chasmogamous?

Pansy is chasmogamous flower. Chasmogamous flowers have exposed anthers and stigma.

What is cleistogamy write advantages and disadvantages?

Flowers which are never open to ensure self-pollination is called cleistogamy. … Cleistogamy has the advantage that the plant produces assured seed set even in the absence of pollinators and disadvantage is that self-pollination occur which reduces chances of variation and evolution of genetically superior progeny.

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What is the example of chasmogamous flower?

Chasmogamous flowers belong to angiosperms. Some of the chasmogamous flowers include sunflower, Hibiscus, Viola, beans, peas and commelina flowers. Chasmogamy is a type of pollination that occurs only in chasmogamous flowers.

What is advantage of cleistogamy?

The principal advantage of cleistogamy is that it requires fewer plant resources to produce seeds than does chasmogamy, because development of petals, nectar and large amounts of pollen is not required. This efficiency makes cleistogamy particularly useful for seed production on unfavorable sites or adverse conditions.

What is the difference between chasmogamous and cleistogamous?

The main difference between chasmogamous and cleistogamous is that chasmogamous flowers are open and showy, exposing their reproductive structures to the outside, whereas cleistogamous flowers remain closed and hidden so that anthers and stigmas are never exposed.

What are chasmogamous and cleistogamous flowers Class 12?

Chasmogamous flowers have exposed anthers and stigma. 1. Cleistogamous flowers remain closed and the anthers and stigma lie close to each other. … Cleistogamous flowers do not need pollinators or attractive floral parts or nectaries to reward pollinators.

Is Oxalis a chasmogamous?

Chasmogamous flowers have their anthers and stigma exposed, whereas cleistogamous flowers are closed and do not open at all. E.g. Oxalis, Viola and Commelina produce both cleistogamous and chasmogamous flowers.

Are cleistogamous flowers underground?

(A) : Cleistogamous flowers are ususally self pollinated. <br> (R) : These remain unopened and are found underground.