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P.sylvestre
| Habit : | A climbing shrub, with apparently soft branches, much compressed and furrowed when dry, branches subterete.
| | Leaves : | Petioled, hardly coriaceous, elliptic or ovate acuminate, base acute rounded or subcordate 5-nerved from near the base, 10 - 12.5 by 5 - 7.5 cm., with much shorter petioles, and never rounded ovate, base acute or rounded rarely cordate, nerves not so basal; petiole 1.25 - 1.67 cm.
| | Spikes : | Long, very slender, bracts of male copular adnate to the rachis, of the female with raised margins glabrous within, rachis slender, glabrous. Male spikes 12.5 - 15 cm., stamens 2-4; female lengthening much in fruit.
| | Flowers : | Rather distant. | | Fruits : | Globose, 0.42 to nearly 0.63 cm. |
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