1A.	Plants unarmed	2
1B.	Plants thorny	8
2A.	Leaves pinnate, paripinnate, the rachis ending in a pair of leaflets; fruit indehiscent	Inga
2B.	Leaves bipinnate; fruit dehiscent	3
3A.	Petiole without glands (nectaries)	4
3B.	Petiole with glands between or below the pair of proximal pinnae	5
4A.	Stigma cup-shaped, slightly wider than style; 16-grain polyads with eccentric, lentil-shaped thickenings in the central cells	Zapoteca
4B.	Stigma discoid or capitate, 3 times wider than the style; 8-grain polyads, 6 peripherals and 2 centrals	Calliandra
5A.	Fruit valves separating from persistent margin; flowers in capitula or spikes	Lysiloma
5B.	Fruit valves not separating from persistent margin; flowers in capitula	6
6A.	Fruit subcylindrical or moniliform, slightly or strongly falcate and frequently coiled	Cojoba
6B.	Fruit flattened or compressed but plump, 2–10 cm wide, straight or coiled	7
7A.	Fruit thin, straight, exocarp flexible, 3–5 cm wide	Albizia
7B	Fruit, circular or semicircular, coiled, broadly oblong, 5–7 cm wide; stamen filaments white to yellow-white	Enterolobium
8A.	Leaves with a pair of pinnae, each pinna with a pair of leaflets; seeds with fleshy aril	Pithecellobium
8B.	Leaves with 1 or more pairs of pinnae, each pinna with 2 or more pairs of leaflets	9
9A.	Fruits flattened, straight, dehiscent at both sutures, without septa; leaves with 4 or more pairs of pinnae	Havardia
9B.	Fruit subcylindrical, cylindrical, or torulous; straight or curved; leaves with 1–3 pairs of pinnae	10
10A.	Petiolar gland sessile, superficially cupular; ovary stipe 1 mm long or longer; fruit leathery, curved, flattened, unilocular	Painteria
10B.	Petiolar gland stipitate, sub-columnar or columniform; ovary stipe 1 mm long or shorter; woody fruit, straight or slightly curved, internally divided into interseminal spaces	Ebenopsis