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Tuber subcylindric, ± 3-4 cm in diameter or more, tough, woody. Petiole green with darker transverse blotches, 15-35 cm long, 1-2 cm in diameter near base; blade 20-40 cm long; leaflets 4-8 per side, subopposite, distant, oblong-ovate to-elliptic to-obovate, sometimes oblanceolate, fleshy, dark glossy green, 5-15 cm long, 1.5-5 cm broad, shortly acuminate, sessile or shortly petiolulate, articulated to rhachis, cuneate to rounded basally; rhachis terete, marked like petiole. Peduncle 3-20 cm long, 0.4-1 cm in diameter, erect at first recurving strongly in fruit, pushing infructescence into ground-litter. Spathe 5-8 cm long, coriaceous; tube shortly cylindric to ellipsoid, 1-1.5 cm long, 1-2 cm in diameter, green on outer surface; limb broadly oblong-ovate, 5-6 cm long, 3.5-5.5 cm broad, rounded and cuspidate at tip, pale green to whitish or yellow. Spadix 5-7 cm long; staminate part cylindric to clavate, 4-5 cm long, 1-1.5 cm in diameter, narrowed at base; pistillate part shortly cylindric-ellipsoid, 1-2 cm long, 0.7-1.7 cm in diameter. Tepals white; stigmas yellowish. Berry white, surrounded by persistent tepals, with septal suture, up to 1.2 cm broad, 1-2-seeded. Seeds brown, ellipsoid, ± 0.8 cm long, 0.5 cm.
