1	"Flowers actinomorphic; petals valvate, equal; stamens usually numerous, forming the conspicuous part of the inflorescence; leaves often bipinnately compound or reduced to phyllodes."	Mimosoideae
1	"Flowers zygomorphic; petals imbricate, often unequal; stamens 10 or fewer, not forming the conspicuous part of the inflorescence; leaves various, mostly simple or pinnately compound, only occasionally bipinnately compound or reduced to phyllodes."	2
2	"Flowers slightly zygomorphic; corolla not papilionaceous, petals ± equal, free, upper petal usually borne internally to the adjacent lateral petals; stamens 10 or fewer, free."	Caesalpinioideae
2	"Flowers strongly zygomorphic; corolla papilionaceous, petals not equal, ± united; upper petal (standard) borne externally to the adjacent lateral petals (wings), lower petals ± fused (keel); stamens 10, often united into a tube, or the uppermost filament free, or less commonly all free."	Faboideae