Thalamiflorae: petals and stamens hypogynous. It includes the following 6 cohorts (orders): Ranales, Parietales, Polygalineae, Caryophyllineae, Guttiferales, Malvales
Disciflorae: petals and stamens hypogynous and a nectariferous disc. Surrounds the base of the ovary. It contains the following cohorts: Geraniales, Olacales, Celastrales, Sapindales
Calyciflorae: petals and stamens perigynous or sometimes epigynous. It includes 5 cohorts: Rosales, Myrtales , Passiflorales, Ficoidales, Umbellales