1	"Leaves on mature plants simple (phyllodes)"	Acacia
1	"Leaves on mature plants bipinnate"	2
2	"Leaflets alternate"	3
2	"Leaflets opposite"	4
3	"Leaf axis lacking glands; leaflets 7-24 mm wide, tertiary venation not raised; flowers evenly distributed along elongated rachis; seeds red and black, or entirely red"	Adenanthera
3	"Leaf axis with 1 or 2 glands; leaflets (18-)24-37 mm wide, tertiary venation raised; flowers clustered at end of rachis, pseudo-umbellate; seeds brown to black"	Pararchidendron
4	"Branchlets with axillary spines, prickles or spinescent lateral shoots"	5
4	"Branchlets without spines or prickles"	9
5	"Branchlets with scattered prickles, up to 5mm long, often curved"	6
5	"Branchlets with straight axillary spines, 4-35 mm long, or with spinescent lateral shoots"	7
6	"Petioles without glands; stamens bright pink"	Mimosa
6	"Petioles with a prominent sessile gland; stamens white or yellow"	Senegalia
7	"Leaf rachis with a stalked gland (0.5-1.4 mm long) between each pair of pinnae; flower spike with bisexual flowers (apical part) and neuter flowers (basal part)"	Dichrostachys
7	"Leaf rachis without glands or with glands < 0.3 mm long; all flowers bisexual"	8
8	"Flowers in cylindrical spikes; stamens 10; pod indehiscent"	Prosopis
8	"Flowers in globose heads; stamens many; pod dehiscent"	Vachellia
9	"Leaflets with a midvein plus a second longitudinal vein extending for most of the leaflet length"	Calliandra
9	"Leaflets with a midvein only"	10
10	"Largest leaflets more than 11 mm wide"	11
10	"Largest leaflets less than 11 mm wide"	16
11	"Leaf axes without glands; vines, tendrils often present; pods 10-15 cm wide"	Entada
11	"Leaf axes with at least one gland; shrubs or trees, tendrils absent; pods 1-6 cm wide"	12
12	"Pods indehiscent or breaking into indehiscent 1-seeded segments"	13
12	"Pods dehiscent"	14
13	"Leaflets densely hairy on underside; leaves with 3-6 pairs of pinnae"	Samanea
13	"Leaflets glabrous or with a few scattered hairs; leaves with 1-2 pairs of pinnae"	Cathormion
14	"Pods curved or coiled, thick-walled, often brightly coloured"	Archidendron
14	"Pods straight, thin-walled, stramineous or brown"	15
15	"Petiolules 4-7 mm long; seeds with a narrow annular wing (Heliodendron xanthoxylon)"	Heliodendron
15	"Petiolules 1-2.5 mm long; seeds without any wing"	Albizia
16	"Stipules 2.5-12 mm long, mostly persistent for many nodes (but occasionally only on new growth)"	17
16	"Stipules absent or <2.5 mm long"	18
17	"Stipules ovate to broadly ovate; pods circular to elliptical or falcate, 7-41 mm long"	Neptunia
17	"Stipules linear; pods linear, 50-100 mm long"	Desmanthus
18	"Leaves with 1(-2) pair(s) of pinnae; seeds with a narrow annular wing"	Heliodendron
18	"Leaves with (2-)3-22 pairs of pinnae; seeds without a wing"	19
19	"Leaf axes and petioles without glands"	Acaciella
19	"Leaf axes and/or petioles with glands"	20
20	"Inflorescence a dense panicle of short ovoid spikes; petals connate for most of their length"	Falcataria
20	"Inflorescence of globose heads (or long cylindrical spikes), either solitary or in an open panicle; petals free"	21
21	"Stamens 10; anthers with sparse hairs"	Leucaena
21	"Stamens many more than 10; anthers glabrous"	22
22	"Inflorescence solitary or a short raceme < 5mm long; peduncle with a whorl of bracts part-way along its length"	Vachellia
22	"Inflorescence an elongated raceme or open panicle; peduncle lacking bracts"	Acacia