Question

Types of androecium according to the attachment and cohesion of stamen?​

Answer 1

Answer:

There are three types of androecium according to the attachment and cohesion (joining) of stamens:

• Monoadelphous

• Diadelphous

• Polyadelphous

Explanation:

• In androecium, stamens may be free (For example : Petunia) or joined in different kinds like in single group , double group or in several groups.

Monoadelphous (Single group):

• Stamens are United in one group by their filaments. Only anthers are free.

Example: China Rose (Hibiscus), cotton.

Diadelphous (Two groups):

• The filaments are united in two bundles.

Example: Pea - because out of ten stamens, nine stamens form a staminal tube while one is free.

Polyadelphous (Several groups):

• The filaments are United in several groups.

Example: Bombax

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Answer 2

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Attachment of anther and filament:

• Basifixed: The filament is attached to the base of the anther.

• Adnate: It is also basifixed type in which the connective runs throughout the length of anther and protrudes out from the apex.

• Dorsifixed:

• Versatile:

• Didynamous:

• Tetradynamous:

• Monadelphous:

• Diadelphous: