Subfamilies of Leguminosae family are differentiated on the basis of

The family Leguminosae is divided into three sub-families- Papilionoideae, Caesalpinioideae and Mimosoideae. These sub-families are sometimes recognised as three separate families- Papilionaceae, Caesalpiniaceae and Mimosaceae. The three subfamilies are generally identifiable by their flowers.