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P.leptostachyum
| Habit : | A climber with stout branches, quite glabrous, angled and white and grooved when dry, internodes long, nodes hardly swollen.
| | Leaves : | Large coriaceous, petioled, obliquely ovate oblong-ovate or -lanceolate acuminate, 5-nerved above the base, nervules transverse, fruiting spike 17.5 cm. Leaves very pale, 12.5 - 20 by 5 - 10 cm., base acute rounded or cordate; petiole stout, 1.25 - 2.5 cm.
| | Spikes : | Peduncle much longer than the petiole, rachis stout glabrous, bracts with obscure margins, scars glabrous. Spikes pendulous, scars narrow.
| | Fruits : | Scattered, globose, unripe with a distinct style, ripe globose 0.42 cm. Diam. |
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