| 1 |
Leaves simple or unifoliolate |
|
(2) |
| + |
Leaves not simple or unifoliolate |
|
(4) |
| |
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| 2 (1) |
Leaves broadly ovate-cordate (fruit generally 2, rarely 1-seeded) |
|
Indigofera cordifolia |
| + |
Leaves not cordate |
|
(3) |
| |
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| 3 (2) |
Fruit 1-seeded |
|
Indigofera linifolia |
| + |
Fruit 6-8-seeded |
|
Indigofera oblongifolia |
| |
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| 4 (1) |
Gland tipped hairs present |
|
(5) |
| + |
Gland tipped hairs not present |
|
(6) |
| |
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| 5 (4) |
Fruit 10-12 or more seeded; seeds barrel-shaped, slightly quadrangular with plane ends |
|
Indigofera colutea |
| + |
Fruit 4-6 rarely 8-seeded, seeds more or less
discoid with irregular depressions |
|
Indigofera argentea |
| |
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| 6 (4) |
Inflorescence axis spinescent |
|
Indigofera intricata |
| + |
Inflorescence axis not spinescent |
|
(7) |
| |
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| 7 (6) |
Leaflets alternate |
|
(8) |
| + |
Leaflets opposite |
|
(11) |
| |
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|
| 8 (7) |
Flowers in elongated racemes |
|
Indigofera tinctoria |
| + |
Flowers in axillary heads, sessile or short peduncled |
|
(9) |
| |
|
|
|
| 9 (8) |
Fruit 3-6-seeded |
|
Indigofera sessiliflora |
| + |
Fruit 1-3-seeded |
|
(10) |
| |
|
|
|
| 10 (9) |
Entire plant whitish hoary, fruit 1-seeded, almost circular |
|
Indigofera nephrocarpa |
| + |
Plant not whitish hoary, fruit 1-3-seeded, cylindrical |
|
Indigofera linnaei |
| |
|
|
|
| 11 (7) |
Fruit flattened |
|
(12) |
| + |
Fruit not flattened |
|
(13) |
| |
|
|
|
| 12 (11) |
Perennial; fruit 2-5-seeded |
|
Indigofera arabica |
| + |
Annual; fruit 5-9-seeded |
|
Indigofera hochstetteri |
| |
|
|
|
| 13 (11) |
Leaflets 3 per leaf |
|
(14) |
| + |
Leaflets more than 3 per leaf, leaf pinnate |
|
(16) |
| |
|
|
|
| 14 (13) |
Leaflets beset with brown glands on the abaxial side; fruit narrowly winged on both sides of the sutures |
|
Indigofera trifoliata |
| + |
Leaflets without glands, fruit not winged on either side of the sutures |
|
(15) |
| |
|
|
|
| 15 (14) |
Inflorescence axis less than 4.5 cm long |
|
Indigofera trita var. trita |
| + |
Inflorescence axis more than 4.5 cm long |
|
Indigofera trita var. maffei |
| |
|
|
|
| 16 (13) |
Fruit hairy |
|
(17) |
| + |
Fruit glabrous |
|
(25) |
| |
|
|
|
| 17 (16) |
Fruit tetragonal with stiff spreading hairs |
|
Indigofera astragalina |
| + |
Fruit not tetragonal |
|
(18) |
| |
|
|
|
| 18 (17) |
Inflorescence 3-6-flowered |
|
Indigofera tenuifolia |
| + |
Inflorescence more than 6-flowered |
|
(19) |
| |
|
|
|
| 19 (18) |
Fruit torulose, 1-6-seeded |
|
(20) |
| + |
Fruit not torulose, 10-12-seeded |
|
(23) |
| |
|
|
|
| 20 (19) |
Fruit c. 1-1.5 mm broad, leaf c, 2-3.5 cm long;
Inflorescence c. 5 mm long |
|
Indigofera sessiliflora |
| + |
Fruit c. 3-3.5 mm broad, leaf 6-8 cm long;
inflorescence c. 4 cm long |
|
(21) |
| |
|
|
|
| 21 (20) |
One seeded part of the fruit definitely globose,
sutures less broad (fig. 13); the number of leaflets
pre leaf up to 7, the length of the longest rachis up to 6 cm long |
|
Indigofera articulata |
| + |
One seeded part of the fruit not globose, sutures
more broad than those of I. articulata (Fig. 13); the number of leaflets per leaf up to 11, the length of the longest rachis up to cm long |
|
(22) |
| |
|
|
|
| 22 (21) |
Leaflets glabrous adaxially |
|
Indigofera caerulea var. caerulea |
| + |
Leaflets pilose on both sides |
|
Indigofera caerulea var. occidentalis |
| |
|
|
|
| 23 (19) |
Length of the vexillum 5 mm or less |
|
Indigofera tinctoria |
| + |
Length of the vexillum more than 5 mm |
|
(24) |
| |
|
|
|
| 24 (23) |
Plant smaller, leaflets 13-31 per leaf, c. 5-8 mm
long; fruit c. 1.1-1.5 cm long |
|
Indigofera heterantha var. heterantha |
| + |
Plant large, shrubby, leaflets 9-17, c. 1.0-1.3 cm
long; fruit c. 2.5-5.0 cm long |
|
Indigofera heterantha var. gerardiana |
| |
|
|
|
| 25 (16) |
Inflorescence with sterile bracts at the base |
|
Indigofera cassioides |
| + |
Inflorescence without sterile bracts at the base |
|
(26) |
| |
|
|
|
| 26 (25) |
Bracts cymbiform at the base, erect, enclosing
the flower before anthesis |
|
(27) |
| + |
Bracts not cymbiform, erect, but not enclosing
the flower |
|
(28) |
| |
|
|
|
| 27 (26) |
Leaflets pubescent on both surfaces |
|
Indigofera hebepetala var. hebepetala |
| + |
Leaflets glabrous adaxially |
|
Indigofera hebepetala var. glabra |
| |
|
|
|
| 28 (26) |
Flower shorter than the subtending bract |
|
Indigofera atropurpurea |
| + |
Flower longer than the subtending bract |
|
(29) |
| |
|
|
|
| 29 (28) |
Calyx teeth deltoid, not exceeding the cup |
|
Indigofera hamiltonii |
| + |
Calyx teeth lanceolate, exceeding the cup |
|
Indigofera himalayensis |
