| 1 | Margin of leaflets entire or with few subapical teeth. Petals 5. Suture of fruits blunt |
| 1' | Margin of leaflets crenate. Petals 4. Suture of fruits very sharp |
| 2 | Rachis slightly winged or not (Fig. 33a, b). Lower surface of the leaflets papillate, glabrous to sericeous |
| 2' | Rachis not winged (Fig. 33a). Lower surface of the leaflets not papillate, smooth, glabrous |
| 3 | Rachis slightly winged (Fig. 33b). Lower surface of leaflets sericeous; domatia 1 to many pocket-like sacs |
| 3' | Rachis not winged (Fig. 33a). Lower surface of leaflets glabrous to sometimes very sparsely sericeous; domatia 1 (or 2) sac(s) |
| 4 | Petals 1.4-3 mm high; crest of scales well developed, clavate (Fig. 36k). Disc interrupted (Fig. 35c). Fruit 1.4-2.4 cm high by 1-3.6 cm broad |
| 4' | Petals 0.8-1.2 mm high; crest absent (Fig. 36h). Disc uninterrupted (Fig. 35a). Fruit 0.7-0.9 cm high by 0.7-1.3 cm broad |
