| 1 | Basal nerves running up throughout the length of the leaf or nearly so. |
| 1' | Basal nerves running up to ½-⅔ the length of the leaf. |
| 2 | Leaf thick-coriaceous, lower surface densely set with soft erect hairs; margin distinctly serrate; reticulations prominent beneath. Inflorescence ♂ or ♀, at anthesis condensed and shorter than the petiole |
| 2' | Leaf chartaceous to thin-coriaceous, lower surface glabrous or sparsely appressed-hairy; margin finely serrulate to subentire; reticulations obscure. Inflorescence ♂ or ♂♀, at anthesis lax and longer than the petiole |
| 3 | Leaf thick-coriaceous, upper surface strongly rugose and scabrous, lower surface densely pubescent; midrib, nerves, and reticulations prominent beneath |
| 3' | Leaf chartaceous to thin-coriaceous, upper surface not or hardly rugose nor scabrous, lower surface sparsely appressed pubescent or glabrous; midrib, nerves, and reticulations only slightly raised beneath. |
| 4 | Leaf elliptic-lanceolate, more or less glabrous; nerves more than 4 on each side, straight and ascending at a narrow angle (less than 40°) from the midrib. Inflorescences mostly ♂♀, very rarely ♂ or ♀ |
| 4' | Leaves ovate to ovate-elliptic, underneath sparsely appressed pubescent; nerves less than 4, usually 3 on each side, arcuating at a wider angle (c. 45-60°) from the midrib. Inflorescences ♂ or ♀, rarely ♂♀ |
