The group is the third largest land plant family, behind only the Orchidaceae and Asteraceae, with 730 genera and over 19,400 species.[ Mimosoideae: 80 genera and 3,200 species. Mostly tropical and warm temperate Asia and America. Mimosa, Acacia.
Caesalpinioideae: 170 genera and 2,000 species, cosmopolitan. Caesalpinia, Senna, Bauhinia, Amherstia.
Faboideae: 470 genera and 14,000 species, cosmopolitan. Astragalus, Lupinus.