1	"Stamens free (rarely shortly fused at the base)"	2
1	"Stamens with fused filaments"	4
2	"Shrubs with leaflets less than 5 mm wide; seed pods more or less spherical, less than 1 cm long"	Gompholobium
2	"Trees or tall shrubs with leaflets more than 5 mm wide; seed pods elongated, more than 3 cm long"	3
3	"Flower clusters orange to red, in the axils of old leaves or wood; pods dehiscent, woody"	Castanospermum
3	"Flower clusters yellow, terminal; pods prominently constricted between seeds, more or less indehiscent"	Sophora
4	"Anthers with a gland at the tip, covered with hair"	Indigofera
4	"Anthers not as above"	5
5	"Petals 1; stamens strongly protruding"	Amorpha
5	"Combination of characters not as above"	6
6	"Herbs; leaflets 5–9, upper 3 palmate, lower pair stipule-like"	Lotus
6	"Characters not as above"	7
7	"Stamens fused into a sheath that is open on upper surface; pods dehiscent"	8
7	"Stamens variously fused (if as above, then pods indehiscent)"	11
8	"Pods inflated; flowers yellowish"	9
8	"Pods not inflated; flowers white, red, pink, blue or purple, rarely yellow"	10
9	"Leaflets 9–13, pinnate"	Crotalaria
9	"Leaflets 3, 5, or 7, digitate"	Colutea
10	"Flowers red, rarely white or pink; fruit beaked"	Clianthus
10	"Flowers blue or purple, rarely yellow (brightly coloured or multicoloured in cultivars); fruit not beaked"	Lupinus
11	Trees	12
11	"Shrubs or herbaceous perennials with woody bases"	13
12	"Deciduous tree; 2 upper calyx teeth not bent back; stipules often spiny"	Robinia
12	"Evergreen tree; 2 upper calyx teeth bent back; stipules not spiny"	Virgilia
13	"Perennial herbs or deciduous climbers"	14
13	"Evergreen shrubs or woody climbers"	16
14	"Woody deciduous climber with pendent unbranched flower clusters"	Wisteria
14	"Herbaceous perennials"	15
15	"Flowers in clover-like bracted heads; fruit enclosed by sepals"	Anthyllis
15	"Flowers in axillary clusters; fruit not enclosed by sepals"	Galega
16	"Prostrate herb with red showy flowers mostly more than 5 cm long, generally with a black, shiny swelling"	Swainsona
16	"Combination of characters not as above"	17
17	"Styles bearded"	18
17	"Styles hairless or with hair at base only"	19
18	"Flowers mostly more than 3 cm long, the standard shorter than the keel"	Sutherlandia
18	"Flowers mostly less than 3 cm long, the standard equal to or longer than the keel"	Swainsona
19	"Woody climber with Wisteria-like flower clusters"	Millettia
19	"Not as above"	20
20	"Leaves palmate with flat leaflets, or pinnate with cylindrical leaflets"	Psoralea
20	"Leaves pinnate with flat leaflets"	Glycyrrhiza