Tuber subglobose or depressed globose, 1-2.5 cm in diam. Cataphylls 2.4-12 cm, membranous, apex obtuse. Leaf solitary, pedate; petiole green with brown spots, 10-23 cm, proximally forming pseudostem; leaflets 7-9(-12), lanceolate, 3 cm (outermost one) to 10 × 1-2.5 cm, base acute, margin entire, usually erose, apex acuminate; central 3 subequal, remote, sessile; rachis between leaflets 5-10 mm. Peduncle green with brown spots, shorter than petioles, 5-15 cm. Spathe purplish brown with numerous dark brown spots, 6-9 cm in total; tube cylindric, 3-4 cm × 8-12 mm, throat auriculate and outcurved; limb suberect, dark purple at apex, ovate to elliptic, ca. 3.5 × 2 cm, apex acute or acuminate. Spadix unisexual; female zone ca. 7 × 4 mm; ovary yellow-green, obovoid; stigma subsessile, subglobose; male zone ca. 7 mm; synandria lax; anthers 2-4, sessile; thecae subglobose, dehiscing by lateral slits. Appendix erect, purple in basal and apical parts, whitish with purple spots at base, subcylindric, 2.5-3.5 mm, base narrowed into stipe 5-10 mm, apex obtuse. Fl. May-Jun.
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