1	"Mature plants with phyllodes, 'leaves' appearing simple."	Acacia
1	"Leaves bipinnate."	2
2	"Majority of leaflets >12 mm wide, usually <12 leaflets per pinna; plants neither spiny nor bristly."	3
2	"Leaflets <12 mm wide and either numerous per pinna, or if c. 12 then plants spiny or bristly."	4
3	"Leaves with leaflets alternate along the pinnae rachis and mostly with 2–4 pairs of pinnae; pods ± papery."	Pararchidendron
3	"Leaves either with leaflets opposite along the pinnae rachis (pinnae 1–5 pairs), or if leaflets alternate then leaves with only 1 or 1 pair of pinnae; pods leathery to woody."	Archidendron
4	"Stamens usually 5 or 10."	5
4	"Stamens numerous, >10 per flower."	8
5	"Stems armed with spines or prickles."	6
5	"Stems neither spinose nor prickly."	7
6	"Spines straight, >10 mm long; petiole and rachis of mature leaves glabrous; flowers greenish yellow; pods ± moniliform, not bristly, >5 cm long."	Prosopis
6	"Prickles recurved, <5 mm long; petiole and rachis of leaves hairy; flowers pink; pods not moniliform, bristly, <3 cm long."	Mimosa
7	"Shrubs or trees; stipules absent."	Leucaena
7	"Prostrate herbs or subshrubs, <50 cm high; stipules persistent, 4–9 mm long."	Neptunia
8	"Stamens free, usually <8 mm long; flowers in globose heads."	Acacia
8	"Stamens united into a tube at base, stamens >10 mm long; flowers in cylindrical racemes."	Paraserianthes