| 1 | Flowers both in axillary (rather lax-flowered) spikes and panicles composed of such spikes in the same specimen. |
| 1' | Flowers exclusively in axillary spikes (these sometimes very short in ♀ specimens, the flowers seemingly fascicled then). |
| 2 | Both ♂ and ♀ inflorescences very laxly appressedly hairy, i.e. practically glabrous to the naked eye. |
| 2' | Both ♂ and ♂ and ♀ inflorescences ± densely set with brownish substrigose hairs (tomentose in juvenile state) to the naked eye. |
| 3 | Leaves becoming purplish when dried. ♂ Spikes longer than 20 cm. |
| 3' | Leaves becoming brownish or blackish-green, or remaining green-yellowish when dried. ♂ Spikes usually shorter than 20 cm. |
| 4 | Base of leaves properly rounded. |
| 4' | Base of leaves attenuate, rarely almost rounded and cuneate in the same specimen. |
| 5 | Drupe 3.5-4.3 by 2.5-3 by c. 1.5 cm. |
| 5' | Drupe much smaller, rarely up to 2.6 by 1.5 cm. |
| 6 | Leaves blackish-green and hardly reticulate above in the dry state, nerves 6-7 pairs. ♀ Spikes lax-flowered, laxly hairy. |
| 6' | Leaves greenish-yellowish, or maybe greenish-greyish in the dry state, reticulation generally distinct (at least slightly prominent) above. |
| 7 | Flowers laxly arranged, i.e. (much) spaced. Basal pair of nerves curved-ascendent, upper pairs ± rectangularly from the midrib and straight. |
| 7' | Flowers (sub)densely arranged. Nerves of leaves all ± distinctly curved-ascendent. |
| 8 | Leaves membranous to chartaceous, with a very fine and very dense prominent reticulation on both faces, nerves (10-)12-14 pairs. |
| 8' | Leaves subcoriaceous to thin-coriaceous, reticulation more coarse, nerves 6-8(-10) pairs. |
| 9 | ♂ Flowers ± distant from each other along the rachis. |
| 9' | ♂ Flowers close to each other along the ± stoutish rachis. |
| 10 | Rachis filiform. Leaves with 6-8 pairs of nerves. |
| 10' | Rachis slender. Leaves with 8-10 pairs of nerves. |
| 11 | Spikes very short (c. 6 mm), the few flowers together almost in a fascicle. Leaves thin. |
| 11' | Spikes longer to elongate (rachis at least 1 cm) and with numerous flowers. Leaves firm. |
