| 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 |
'Creating awareness of Indian Flora & Fauna'
Winner of Wipro-NFS Sparrow Awards 2014 for efloraofindia.
For identification, learning, discussion & documentation of Indian Flora, please visit/ join our Efloraofindia Google e-group (largest in the world- more than 3,000 members & 3,00,000 messages on 23.8.18) or Efloraofindia website (with a species database of more than 13,000 species & 3,00,000 images of which more than 2,00,000 images are directly displayed on 30.8.19).
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Also author of 'A Photoguide to the Birds of Kolkata & Common Birds of India'.
| 40 (39) | Leaves 3- or 5(-11)-foliolate, to 2.2 × 1.2 cm; racemes much longer than leaves. | 24 I. hamiltonii | |
| + | Leaves (7-)11-19(or 21)-foliolate, to 6.5 × 2.5 cm; racemes equal to slightly longer than leaves. | 25 I. atropurpurea |