| 1 | Leaflets crenulate; nerves and veins well visible on both surfaces |
| 1' | Leaflets entire; veins usually invisible on both surfaces |
| 2 | Leaflets 12-25 per pinna, punctate |
| 2' | Leaflets often 4-10, rarely up to 12-14, per pinna, not punctate |
| 3 | Petals all similar (in shape and size), glabrous |
| 3' | Petals not all similar: only 4 of them similar (in shape and size) and the standard or superior one different, puberulous usually on the central and/or lower part(s) inside and also on the margins |
| 4 | Inflorescences densely flowered. Pedicels 5-6 mm |
| 4' | Inflorescences loosely flowered. Pedicels 10-15 mm |
