1	"Flowers regular (actinomorphic); stamens usually numerous; petals valvate, equal; embryo straight"	2
1	"Flowers irregular (zygomorphic); stamens l0 or fewer; petals imbricate; embryo straight or curved"	5
2	"Stamen filaments united basally into a tube"	Albizia
2	"Stamen filaments free"	3
3	"Perennial herb; stamens 5"	Neptunia
3	"Trees or shrubs; stamens 10 or more"	4
4	"Stamens more than 10"	Acacia
4	"Stamens 10"	Prosopis
5	"Flowers slightly irregular; stamens 10 or fewer, free; petals subequal, free; adaxial petal overlapped by adjacent lateral petals, abaxial petals overlapping; embryo straight"	6
5	"Flowers very irregular; stamens 10, often united; petals unequal, more or less united; adaxial petal (standard) outside the adjacent lateral petals (wings), abaxial petals (keel) valvate, conduplicate, often connate; embryo curved"	9
6	"Leaves bipinnate"	Parkinsonia
6	"Leaves pinnate, lobed or reduced to phyllodes"	7
7	"Leaflets 2, 1–2 cm broad"	Lysiphyllum
7	"Leaflets 0 or 4 or more, if 2 then less than 1 cm broad"	8
8	"Style small, terete; stamens 10, rarely 7 or 6; anthers usually unequal"	Cassia
8	"Style large, petal-like; stamens 5, 2 of them barren"	Petalostylis
9	"All 10 stamens free, filaments rarely slightly connected at the base"	10
9	"Stamens variously united by their filaments (10, 9 +l, 5 +5) in a sheath or tube around the ovary"	24
10	"Flowering stem leafy"	11
10	"Flowering stem leafless (leaves reduced to scales or spines or to long filiform petioles)"	20
11	"Leaves opposite, decussate"	12
11	"Leaves alternate or whorled"	14
12	"Stipules absent; leaves linear-lanceolate, glabrous"	Eutaxia
12	"Stipules present; leaves oblong-ovate, pubescent below"	13
13	"Leaves 3–8 cm long"	Gastrolobium
13	"Leaves less than 1 cm long"	Pultenaea
14	"Ovules 2"	15
14	"Ovules 4 or more"	19
15	"Stipules present"	Pultenaea
15	"Stipules absent"	16
16	"Leaves with recurved or revolute margins"	17
16	"Leaves grooved above by the involute margins or replaced by leaf-like flat phyllodes"	18
17	"Bracteoles present"	Phyllota
17	"Bracteoles absent"	Aotus
18	"Leaves grooved above by the involute margins"	Dillwynia
18	"Leaves replaced by leaf-like phyllodes, flattened horizontally"	Daviesia
19	"Leaves trifoliolate; calyx glabrous outside, dark-coloured"	Gompholobium
19	"Leaves simple; calyx pubescent"	Isotropis
20	"Flowers more than 3 cm long, in short basal racemes; standard narrow or narrow-ovate"	Leptosema
20	"Flowers less than 1 cm long, axillary, solitary or in axillary racemes; standard broad (suborbicular)"	21
21	"Calyx-teeth subequal, short; flowers solitary, axillary or in short axillary racemes"	22
21	"Upper 2 calyx-teeth broad, falcate, united higher up to form an upper lip; flowers few to several, in clusters or whorls along the stem"	23
22	"Flowers solitary, axillary; pod sessile, obovoid, black"	Viminaria
22	"Flowers in short axillary racemes; pod triangular, compressed, stipitate"	Daviesia
23	"Branches less than 1 mm thick; flowers 1–4"	Sphaerolobium
23	"Branches more than 1 mm thick; flowers several, in axillary racemes"	Daviesia
24	"Staminal tube monadelphous, filaments completely or at least in the lower part completely closed round the ovary (10); anthers alternately longer and basifixed and shorter and dorsifixed (versatile); or the staminal tube split open adaxially facing the standard"	25
24	"Staminal tube diadelphous; upper adaxial stamen facing the standard, free, the other 9 united by their filaments in a tube around the ovary (9 + 1), or the tube split open on the upper and lower side of the ovary being in 2 series of 5 stamens each (5 + 5)"	38
25	"Staminal tube completely closed round the ovary (anthers versatile)"	26
25	"Staminal tube split open on the side facing the standard"	31
26	"Leaves 3-foliolate or digirately compound of more than 3 leaflets (palmate)"	27
26	"Leaves simple or absent at maturity"	30
27	"Branches and leaves spiny; flowers yellow"	Ulex
27	"Branches and leaves not spiny"	28
28	"Leaves palmate, 7–11-foliolate"	Lupinus
28	"Leaves 3-foliolate"	29
29	"Upper calyx-lip shortly 2-toothed, with a shallow notch between the obtuse inconspicuous teeth"	Cytisus
29	"Upper calyx-lip long and deeply 2-toothed, teeth triangular, deeply divided"	Genista
30	"Flowers 8–10 mm long, white; calyx 2-lipped, caducous"	Retama
30	"Flowers 20–30 mm long, yellow; calyx I-lipped, persistent"	Spartium
31	"Anthers uniform; pod flattened"	32
31	"Anthers dimorphic; pod flattened or not"	35
32	"Leaves of 3–11 leaflets"	33
32	"Leaves simple, 1-foliolate or absent"	34
33	"Leaves digitately 3-foliolate; stipules ovate; stem prostrate"	Muelleranthus
33	"Leaflets 5–11; stipules narrow-triangular; stem erect"	Ptychosema
34	"Leaves alternate or absent, rarely some opposite; flowers pedicellate; petals glabrescent; pod not winged, dehiscent by both sutures"	Bossiaea
34	"Leaves opposite, lamina with 3 or more pungent points flowers sessile; petals velutinous; pod winged dorsally, dehiscent by the lower suture only"	Platylobium
35	"Keel acute or beaked; pod inflated; seed not arillate"	Crotalaria
35	"Keel obtuse; pod flattened (except in Hovea); seed arillate"	36
36	"Leaves petiolate, with 3 leaflets; flowers yellow; pod long-stipitate"	Goodia
36	"Leaves simple, subsessile or absent"	37
37	"Leaves lanceolate, hoary beneath; flowers blue; pod turgid, scarcely longer than broad"	Hovea
37	"Leaves obovate or linear or reduced to scales; flowers yellow, red or purplish; pod flattened, longer than broad"	Templetonia
38	"Leaves and leaflets not toothed, principal lateral veins of the leaves or leaflets anastomosing and not reaching the margin, sometimes obscure; leaves sometimes caducous or reduced to a spine-tipped phyllode"	39
38	"Leaves trifoliolate, toothed; principal lateral veins of the leaflets terminating in the margin; upper stamen free, lower 9 united (9 + 1); chiefly introduced herbs"	63
39	"Filaments forming 2 series of 5 stamens each (5 + 5), split open on the standard and keel side; pod constricted between the seeds, lomentaceous"	Aeschynomene
39	"The upper adaxial stamen facing the standard free, 9 stamens united by their filaments into a sheath around the ovary (9 +1); pod dehiscent or indehiscent but not lomentaceous"	40
40	"Pod moniliform but not lomentaceous; spiny shrubs"	41
40	"Pod 2-valved, dehiscent or indehiscent, dorsiventral constriction between the seeds minute or absent"	42
41	"Leaves simple; keel fully developed, housing the stamens; pod 3- or 4-seeded"	Alhagi
41	"Leaves 3-foliolate; keel minute, shorter than the stamens; pod 1- or 2-seeded"	Erythrina
42	"Anther connective appendiculate; standard hairy"	Indigofera
42	"Anther connective not appendiculate; standard usually glabrous"	43
43	"Leaf lamina glandular-punctate or glandular-hairy"	44
43	"Leaf lamina not glandular"	48
44	"Leaves glandular-hairy"	Vigna
44	"Leaves glandular-punctate"	45
45	Leaflets	46
45	"Leaflets 5 or more"	47
46	"Ovary 1-ovulate; pod indehiscent; shrubs, subshrubs or herbs"	Psoralea
46	"Ovary 2-ovulate; pod dehiscent; trailing or twining herbs"	Rhynchosia
47	"Leaflets linear; pod included in the calyx, with rough texture"	Psoralea
47	"Leaflets ovate-lanceolate; pod exserted, with hooked prickles"	Glycyrrhiza
48	"Leaves simple, imparipinnate, or absent"	49
48	"Leaves paripinnate, rhachis ending in a fine point or tendrils"	61
49	"Leaflets 1 or 3 only"	50
49	"Leaflets 3 or more"	55
50	"Calyx-teeth 4 (the upper 2 united, all lanceolate and longer than the tube); peduncle below the flower-cluster thickened and nodose"	Galactia
50	"Calyx-teeth 5 (subequal or various); peduncle not nodose"	51
51	"Leaflet 1"	Hardenbergia
51	Leaflets	52
52	"Calyx glabrous except for the ciliate margins"	Dipogon
52	"Calyx pubescent"	53
53	"Style bearded along the inner margin; style-tip with hair-tufts behind the stigma"	Swainsona
53	"Style and stigma glabrous"	54
54	"Flowers 6–9 mm long; pod with pithy partitions between the seeds; seed with a scale-like papery appendage"	Glycine
54	"Flowers 10–25 mm long; pod septate; seed with a fleshy appendage"	Kennedia
55	"Leaflets 5, lower pair of leaflets stipule-like, remote from the 3 proximate upper ones; of 5 alternate stamens the filaments dilated at the summit"	Lotus
55	"Leaflets usually more than 5 (rarely 3), if 5 the lower pair not resembling stipules"	56
56	"Stipules becoming 2 stout spines"	Robinia
56	"Stipules leafy or leathery but never spines"	57
57	"Style bearded along the inner margin; pod usually inflated, bladdery"	58
57	"Style not bearded"	60
58	"Flowers less than 2 cm long; petals subequal, obtuse"	Swainsona
58	"Flowers more than 2 cm long, red; wings 2–4 times shorter than the keel; petals subacute"	59
59	"Flowers more than 4 cm long; wings about half as long as the ovate standard; prostrate annual herbs"	Clianthus
59	"Flowers c. 3 cm long, wings hyaline, c. 4 times shorter than the keel or narrow standard; hairy shrub with silvery pods"	Sutherlandia
60	"Standard narrow, glabrous; hairs medifixed; seed triangular or reniform, rugulose, pitted"	Astragalus
60	"Standard orbicular, pubescent; hairs basifixed; seed subglobose, smooth"	Tephrosia
61	"Leaf rhachis ending in a fine point; pod linear, 10–20 cm long, more than 20-seeded"	Sesbania
61	"Leaf rhachis ending in tendrils; pod 2–10 cm long, less than 10-seeded"	62
62	"Leaflets 2; stipules large, leafy, semisagittate"	Lathyrus
62	"Leaflets 4 or more; stipules small, triangular- lanceolate"	Vicia
63	"Calyx throat with 2-lipped callosities or a ring of hairs; pod inserted in the calyx; all or 5 filaments of the stamens dilated at the apex; flowers usually more than 10 in dense globular or cylindrical heads"	Trifolium
63	"Calyx throat open; pod exceeding the calyx; filaments not dilated at the apex"	64
64	"Pod spirally curved or coiled, rarely short and falcate and then the plants not strong-smelling; cotyledons articulated; flowers in clusters of 1–5 in ovoid heads or racemes on the slender peduncle"	Medicago
64	"Pod straight or falcate; plants usually strong-smelling; cotyledons not articulated"	65
65	"Pod subglobose or ovoid, straight, indehiscent; flowers numerous (to 50), drooping in slender and elongate racemes"	Melilotus
65	"Pod linear, curved, dehiscent; flowers 1–8, in erect or sub-sessile axillary cluster"	Trigonella