| 1 |
Leaflets abaxially and calyx generally with colored sessile glands; bracteoles absent; inflorescence nodes not swollen, 1-flowered (subtribe Cajaninae) |
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(2) |
| + |
Leaflets and calyx without glands; bracteoles often present; inflorescence nodes often swollen, bearing more than 1 flower |
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(6) |
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| 2 (1) |
Legumes 3- or more seeded |
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(3) |
| + |
Legumes 1- or 2-seeded |
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(4) |
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| 3 (2) |
Legumes not depressed between seeds. |
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93 Dunbaria |
| + |
Legumes depressed between seeds. |
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94 Cajanus |
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| 4 (2) |
Leaves 1-foliolate; seeds with funicle attached at end of linear hilum. |
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92 Eriosema |
| + |
Leaves 3-foliolate, or simple (not 1-foliolate); seeds with funicle attached at middle of hilum |
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(5) |
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| 5 (4) |
Twining herbs or shrublets; leaves clearly pinnately 3-foliolate; legumes compressed. |
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91 Rhynchosia |
| + |
Erect shrubs or prostrate herbs (F. procumbens); leaves apparently digitately 3-foliolate or simple; legumes turgid. |
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95 Flemingia |
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| 6 (1) |
Style flattened, thickened or twisted, mostly bearded, if not bearded and terete, then standard and keels with minute appendages; hilum usually covered with spongy strophiole (subtribe Phaseolinae) |
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(7) |
| + |
Style generally terete and unbearded (sometimes a few hairs below stigma), occasionally coiled (in Erythrininae), sometimes bearded or flattened (in Clitoriinae); hilum rarely covered with spongy tissue (some Erythrina excepted) |
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(14) |
| |
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| 7 (6) |
Style flattened laterally. |
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110 Lablab |
| + |
Style terete or flattened dorsiventrally |
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(8) |
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| 8 (7) |
Hooked hairs present on vegetative parts. |
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115 Phaseolus |
| + |
Hooked hairs absent |
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(9) |
| |
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| 9 (8) |
Petal wings longer than standard; style twice ca. 90° incurved. |
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114 Macroptilium |
| + |
Petal wings shorter than standard; style various but not as above |
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(10) |
| |
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| 10 (9) |
Legumes 4-winged. |
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98 Psophocarpus |
| + |
Legumes not 4-winged |
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(11) |
| |
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| 11 (10) |
Stigma lateral or oblique; stipules produced below point of attachment (except in V. adenantha). |
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113 Vigna |
| + |
Stigma terminal; stipules not produced below point of attachment |
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(12) |
| |
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| 12 (11) |
Standard appendages absent; corolla purple-blue. |
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97 Dysolobium |
| + |
Standard appendages present; corolla white, violet, or yellowish |
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(13) |
| |
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| 13 (12) |
Standard appendages short; corolla white or violet. |
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111 Dolichos |
| + |
Standard appendages long and narrow; corolla yellowish. |
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112 Macrotyloma |
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| 14 (6) |
Flowers generally resupinate; calyx naked inside; style narrowed, penicillate or bearded distally; corolla often hairy; leaflets 1, 3, or 5-9, with minute hooked hairs (subtribe Clitoriinae) |
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(15) |
| + |
Flowers not resupinate, or if resupinate then differing from above in other respects |
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(16) |
| |
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| 15 (14) |
Standard without spur on back. |
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82 Clitoria |
| + |
Standard with a conspicuous spur on back. |
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83 Centrosema |
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| 16 (14) |
Standard silky hairy outside, rather small, without appendages inside; seeds smooth, with a prominent aril; inflorescence not or only slightly nodose (subtribe Ophrestiinae). |
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81 Ophrestia |
| + |
Standard glabrous, or if hairy then inflorescence generally nodose or flowers much modified |
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(17) |
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| 17 (16) |
Flowers mostly adapted to birds or bats for pollination, petals generally unequal in length, sometimes with small bee-type flowers but then either coiled (Apios, Cochlianthus) or flowers in extensive panicles and legume samaroid (Spatholobus) (subtribe Erythrininae) |
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(18) |
| + |
Flowers mostly adapted to bees for pollination, or if bird-type flowers then petals subequal in length |
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(23) |
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| 18 (17) |
Trees or shrubs; stems with prickles; keels much shorter than standard. |
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96 Erythrina |
| + |
Climbers, rarely trees (Butea monosperma); stems without prickles; keels usually largest petals |
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(19) |
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| 19 (18) |
Style spirally coiled |
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(20) |
| + |
Style not spirally coiled |
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(21) |
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| 20 (19) |
Leaves (3 or)5- or 7(or 9)-foliolate, green when dried. |
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84 Apios |
| + |
Leaves 3-foliolate, black when dried. |
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85 Cochlianthus |
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| 21 (19) |
Legume with many seeds, 2-valved; irritant hairs usually present. |
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88 Mucuna |
| + |
Legume samaroid with 1 apical seed, empty below; irritant hairs absent |
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(22) |
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| 22 (21) |
Flowers purple, rose, or white, 0.5-1 cm. |
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89 Spatholobus |
| + |
Flowers yellow to scarlet, 1.5-8 cm. |
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90 Butea |
| |
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| 23 (17) |
Inflorescences generally with nodes swollen; seeds diverse, with short to long hilum (subtribe Diocleinae) |
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(24) |
| + |
Inflorescences with nodes not or only slightly swollen; seeds smooth or granular, with short hilum (subtribe Glycininae) |
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(27) |
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| 24 (23) |
Stigma lateral to subterminal; ovary hirsute, hairs extending up style, forming a false beard. |
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100 Pachyrhizus |
| + |
Stigma terminal; style naked |
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(25) |
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| 25 (24) |
Calyx 2-lipped, upper lip large, entire or 2-lobed, lower lip small; stamens monadelphous; legumes ligulate to oblong. |
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79 Canavalia |
| + |
Calyx not strongly 2-lipped; stamens diadelphous; legumes linear |
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(26) |
| |
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| 26 (25) |
Upper calyx lobes completely united (calyx appearing 4-lobed). |
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80 Galactia |
| + |
Upper calyx lobes ± separate (calyx 5-lobed). |
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99 Calopogonium |
| |
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| 27 (23) |
Legumes indehiscent |
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(28) |
| + |
Legumes dehiscent |
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(29) |
| |
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| 28 (27) |
Bracts caducous; fruit many seeded; seeds with filiform funicle. |
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87 Mastersia |
| + |
Bracts enlarging after anthesis, leaflike, boat-shaped; fruit 1-seeded; seeds without filiform funicle. |
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109 Phylacium |
| |
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| 29 (27) |
Anthers alternately small and sterile or large and fertile; legume with persistent style forming a hook. |
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107 Teramnus |
| + |
Anthers all similar, fertile; legume without hooked style |
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(30) |
| |
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| 30 (29) |
Stems strongly 4-angled, angles with descending brown hairs; flowers 5-7 mm. |
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101 Teyleria |
| + |
Stems not strongly 4-angled, angles without brown hairs; flowers mostly longer than 7 mm |
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(31) |
| |
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| 31 (30) |
Leaves 1-foliolate. |
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104 Nogra |
| + |
Leaves 3-foliolate |
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(32) |
| |
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| 32 (31) |
Claws of wings and keel longer than blade; seeds smooth, without a scarious strophiole; ovary walls often transparent |
|
(33) |
| + |
Claws of wings and keel shorter than blade; seeds usually rough; hilum often with a scarious strophiole; ovary walls opaque |
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(35) |
| |
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|
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| 33 (32) |
Calyx truncate, lobes ± obsolete; flowers yellow. |
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102 Dumasia |
| + |
Calyx lobes distinct, triangular; flowers usually red-purple, purple, blue, or white, never yellow |
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(34) |
| |
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| 34 (33) |
Legumes septate between seeds; bracteoles present; bracts rather large and persistent. |
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86 Shuteria |
| + |
Legumes not septate; bracteoles absent. |
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106 Amphicarpaea |
| |
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|
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| 35 (32) |
Flowers 2 or more per node of inflorescence. |
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103 Pueraria |
| + |
Flowers 1 per node of inflorescence |
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(36) |
| |
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|
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| 36 (35) |
Flowers 12 mm or more. |
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105 Sinodolichos |
| + |
Flowers 9 mm or less. |
|
108 Glycine |
