| 1 | Panicles singly branched or doubly branched at base. |
| 1' | Panicles doubly branched; tomentum dense, even, persistent. |
| 2 | Twigs, petioles and panicles densely evenly shortly buff pubescent. |
| 2' | Twigs, petioles and panicles sparsely tufted tomentose or glabrescent. |
| 3 | Leaves (9-)18-23 by (4-)6.5-9.5 cm; nerves 13-15 pairs. |
| 3' | Leaves 8-16 by 4-6 cm; nerves 10-14 pairs |
