gemmation

Gemmation is a far commoner occurrence amongst the simpler than amongst the more highly organised forms.

This mode of gemmation is connected by a series of gradations with the normal external gemmation.

The true asexual modes of reproduction amongst the Metazoa consist of fission and gemmation.

These may be classified in three groups: fission, budding or gemmation, spore formation.

Both fission and gemmation when incomplete lead to the formation of colonies.