Plants dioecious. Tuber renewed seasonally, depressed globose, 1-2 cm in diam. Cataphylls 2, creamy green, membranous, acute. Leaves 1 or 2; petiole green without spots, 9-25 cm, proximally forming pseudostem; leaf blade 3-foliolate or pedately 5-foliolate; leaflets sessile or subsessile, green, narrowly lanceolate or elliptic, papery, margin entire; terminal leaflet 4-12 × 0.5-2.5 cm. Peduncle emerging from pseudostem, green, usually longer than petioles, 15-28 cm. Spathe green or pale green; tube funnelform, 5-6 × 1-2 cm, throat margin obliquely truncate, slightly recurved; limb ovate-lanceolate, apex acute or acuminate. Spadix unisexual; female zone cylindric, 2-2.5 × ca. 0.7 cm; ovary yellowish green, fusiform, style short; stigma capitate; male zone cylindric, ca. 2.2 cm × 4 mm; male flower of 2 or 3 stamens; anthers violet, globose, 2-thecous, dehiscing by apical pore; appendix in male spadix sessile, recurved or twining, pale green, proximally narrowly cylindric, distally filiform, to 20 cm, naked, base ca. 3 mm in diam.; appendix in female spadix recurved, usually purple, 4-5 cm, much shorter than appendix in male spadix. Berries red, 1-4-seeded. Fl. Jun, fr. Aug.
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