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P.zeylanicum
| Habit : | A scandant climber, much branched, quite glabrous, branches terete stout woody, nodes much thickened.
| | Leaves : | Small, long-petioled, coriaceous, broadly ovate or ovate-cordate, acuminate 3-5-nerved from the base, nerves and nervules impressed above very prominent beneath. 3.75 - 6.25 by 2.5 - 3.75 cm., paler beneath, often bullate above, base usually equal; petiole 1.25 - 2.5 cm.
| | Spikes : | Peduncles longer than the petioles, fruiting spikes short robust, bracts adnate tips raised in fruit, fruit globose smooth densely crowded. Male spikes 2.5 - 3.75 cm.; bracts closely imbricate, the lowest sometimes oblong and peltate; stamens 2, flaments very broad. Fruiting spikes 2.5 - 3.75 cm., flexuous. |
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