Tuber subglobose, ca. 3 cm in diam. Cataphylls obtuse at apex. Leaves 1 or 2; petiole 40-70 cm, proximal half sheathing into pseudostem; leaf blade radiate to palmate; leaflets 6-9, usually 7, broadly oblong-lanceolate, base long cuneate, apex acuminate and caudate with filiform tail ca. 6 cm; central leaflet 10-25 × ca. 5.8 cm. Peduncle shorter than petioles, 20-40 cm. Spathe green or distally dark brown with whitish stripes, 15-20 cm (including tail); tube cylindric, 5-10 × 1-2 cm, throat obliquely truncate, slightly recurved or not; limb suberect, ovate to ovate-lanceolate, 4.5-5 × ca. 3.5 cm, apex acuminate into filiform tail to 4-5 cm. Spadix unisexual; female zone 2.5-3 cm × 6-7 mm; ovules 5-9, bottle-shaped; male zone ca. 2 cm × 2.5 mm; synandria sessile; anthers 2. Appendix stipitate, ca. 9 cm in male spadix, 5-6 cm in female, base whitish, swollen, ca. 3 mm in diam. in male spadix, ca. 6 mm in diam. in female, gradually narrowed distally, apex exserted from tube, erect or recurved, dark brown, 1-1.5 mm in diam.
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