Angiosperms were distinguished into archichlamydeae and metachlamydeae by
Candolle
Conquist
Hutchinson
Engler and Prantl
.1. Archychlamydae consists of plants belonging to monoclamydous and polypetalae.It consists of 33 orders.
2.Metachlamydae (Sympetalae) corresponds to gamopetalae . It consists of 11 orders.