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P.muricatum
| Habit : | A stout climber with branches terete or obscurely furrowed when dry.
| | Leaves : | Large, membranous, elliptic or elliptic-oblong acuminate, 7-9 nerved, sparsely hairy above tomentose beneath, 15 - 22.5 by 8.75 - 15 cm., base rounded or subcordate rarely subacute, equal or unequal; petiole 1.25 - 7.5 cm.
| | Spikes : | Female spike 12.5 - 15 cm., stoutly pedicelled tomentose, rachis stout, bracts peltate. Spike 1-2-sexual, erect or drooping; peduncle 1.25 cm.; bracts glabrous above, subsessile, orbicular.
| | Fruits : | Unripe on thick pedicels, many imperfect, the pedicel being truncate and sessile. |
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