| 1 | Lamina ± densely hairy and ± scabrous above, the margin denticulate. — Malay Peninsula |
| 1' | Lamina ± sparsely hairy and smooth above, the margin (sub)entire |
| 2 | Lower surface of the lamina ± densely hairy on the main veins |
| 2' | Lower surface of the lamina sparsely puberulous to glabrous on the main veins |
