Caudex as much as 1 m. high; petioles 6-9 cm. long, geniculate 2 cm. below the apex, subterete; blade gradually narrowed above the basal lobes to the abruptly narrowed and cuspidate apex, 50 cm. long or more, the basal lobes 15 cm. long and 10 cm. wide, elongate-oblong, with almost equal sides, rounded, the basal sinus triangular or oval, open, the basal nerves 5-6 on each side, the costal nerves 7-9 on each side, united to form a collective nerve remote from the margin; peduncles 1 m. long or more; spathe 20 cm. long, lanceolate, long-acuminate, short-decurrent at the base, green or yellowish green; spadix borne on a stipe 5-15 mm. long, at first violet, later yellow, elongate-fusiform, 20 cm. long, 1 cm. thick; ovaries cylindroid, the style exserted above the sepals; berries ovoid, 1 cm. long, 5 mm. thick, whitish; seeds cordiform, the testa green, verruculose.
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