Cyrtosperma giganteum (Araceae)
Translated, Engler's Latin description reads: "Leaf with petiole to 2.5 m long, adult blade coriaceous, ovate-sagittate, anterior lobe to about 75 cm long, 70 cm wide at the base, obtuse or apiculate at the apex, posterior lobes to 1 m or more long, 50 cm wide, bent back, subacute, separated by a deep acute sinus, with about 8 distant lateral primary nerves joined into a marginal collective vein, posterior costae naked in the sinus for about 10 cm. Peduncle to 4.5 cm diam., smooth. Spathe ovate-lanceolate bearing a long acumen, reddish-brown, convolute below, c. 8 cm diam., c. 35 cm or more long; spadix dark rose, stipitate for 2 cm, 21 cm long, about 4 cm thick. Stamens 4-5, filaments to 1 mm long. Pistil 4 mm long, ovary pluriovulate. Perianth with 4-5 tepals 3.5 mm long. Fruiting spadix to 36 cm long, 9 cm thick. Berries ellipsoid, green, 1.5 cm long, 6 mm thick. Seeds several."
Ovary multiovulate; fruit up to 5-seeded; infructescence massive, to c. 35 cm long and c. 11 cm thick. Lorentz river in Irian Jaya.
Irian Jaya; known only from three collections from Lorentz (Noord) River.