Different types of androecium found of flowers are :

✯On the basis of Cohesion :

• Monoadelphous: Stamens may be united by means of their filament in one bundle with free anthers.

Eg:-----> China rose, lady's finger.

• Diadelphous : when the filaments are united into two bundles and the anthers remain free.

Eg. -----> bean, gram

• Polyadelphous : When the filaments are united into more than two bundles but anthers are free.

Eg. ----> Lemon, castor.

• Syngenesious: When anthers are united but filaments are free.

Eg. ----> Sunflower

• Synandrous : When anthers as well as filament of stamens are united throughout the whole length.

Eg.----> Members of Cucurbitaceae family

✯ On the basis of length and attachment of stamens :

• Didynamous : 4 stamens , 2 outer small and 2 inner Long.

Eg.---> Ocimum, Salvia

•Tetradynamous: 6 stamens, 2 outer small and 4 Inner long.

Eg. ----> Mustard , Radish

• Heterostemony : Stamens are of different length.

Eg. ----> Cassia.