1 | Leaves 3-5-plinerved, often subpeltate. Climber, often with axillary tendrils. Fruit long-stipitate narrowed to the base. Pericarp dehiscent, inside red. Seed blue |
1' | Leaves penninerved (if ± triplinerved a tree). Fruit at most very short-stipitate, usually rounded or obtuse at base. Seed whitish. |
2 | Calyx indistinct, merely with a rim. Fruit inferior, supported by a persistent epicalyx consisting of 3 concrescent bracts |
2' | Calyx distinct. No epicalyx. |
3 | Calyx much enlarged in fruit. |
3' | Calyx not accrescent in fruit. |
4 | Enlarged calyx connate with the fruit only in its lower part, for the rest frill-like expanded, very large |
4' | Enlarged calyx enveloping the fruit for its entire or almost entire length |
5 | Disk much accrescent, adnate to and almost entirely covering the fruit (which bears the persistent calyx at its base!) |
5' | Disk, if present, not accrescent. |
6 | Petiole very distinctly swollen distally |
6' | Petiole slightly or not thickened distally. |
7 | Leaves usually mucronulate at apex. Axillary spines and ramal thorns may be present |
7' | Leaves not mucronulate at apex. Spines or thorns absent |