Probably a large vine; petioles very slen-der, 20-30 cm. long, the narrow sheath 13-18 cm. long, adnate for its whole length; blades trisect, the middle segment ovate-oblong to elliptic, 15-18 cm. long, 6-11 cm. wide, acuminate, cuneately narrowed to the sessile base, the primary lateral nerves 5-6 on each side, united to form a collective nerve rather remote from the margin, the lateral segments oblong or obliquely ovate, slightly smaller than the middle one, sometimes subauriculate on the outer side, short-petiolulate; peduncles slender, about 7 cm. long, recurved; spathe subcoriaceous, whitish outside, turning orange, pale purple within, the tube oblong-ovoid, 4.5-8 cm. long, adnate to the stipe, the blade ovate-oblong, 7-8 cm. long, 6 cm. wide, caudate-acuminate; spadix slightly more than half as long as the spathe, the pistillate por-tion 2.5 cm. long, 1.5 cm. thick, the stam-inate portion cylindric, very obtuse, 5 cm. long and almost 2 cm. thick at maturity; stamens 4, the synandria 1.5 mm. long; pistils obovoid, 1 mm. long, the stigma discoid, bilobate.
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