| 1 | Leaflets dentate |
| 1' | Leaflets entire |
| 2 | Midrib of the leaflets visible above |
| 2' | Midrib of the leaflets entirely sunken above, invisible |
| 3 | Nerves straight, abruptly curving near the margin; veins densely scalariform (more lax if leaflets large and petiolules at least 4 mm in diam.) |
| 3' | Nerves curving gradually; veins laxly reticulate (sometimes laxly scalariform if leaflets large, but petiolules at most 4 mm in diam.) |
