| 1 | Mature fruits ellipsoid, 4-6 cm long, longer or as long as the enlarged calyx; wing-like calyx lobes 2-5 cm long. |
| 1' | Mature fruits ovoid or subglobose, I½-2½ cm long, several times shorter than the enlarged calyx; wing-like calyx lobes 5½-10½(-16) cm long. |
| 2 | Enlarged calyx slightly shorter than or as long as the fruit, tube c. ½ cm long, lobes narrowly oblong, 3½-5 by ½-1¼ cm. Leaflets 5-7; nerves 9-11 pairs |
| 2' | Enlarged calyx much shorter than the fruit, tube c. ¾ cm long, lobes oblong or lanceolate, 2-3 by ½-1 cm. Leaflets 9-11 (-15); nerves 14-20 pairs |
| 3 | Leaflets with symmetric base; petiolules grooved or the margins incurved above. Enlarged calyx tube on fruit 1½-2¾ cm long |
| 3' | Leaflets with usually asymmetric or oblique base; petiolules, if present, flat or convex above. |
| 4 | Fruits distinctly ½-1½ cm pedicelled; enlarged calyx tube c. ½ cm long. Leaflets sparsely puberulous to rusty-pubescent beneath |
| 4' | Fruits subsessile; enlarged calyx tube c. 1½ cm long. Leaflets glabrous |
