Perennial, tuberous herb; leaves variously lobed or pedatisect, segments subsessile, simple, 2-12 cm long, broadly lanceolate, rounded or retuse at apex, cuneate at base, outer smaller; (flowers not seen) peduncle very stout, 2-5 cm long, green or spotted; spathe 15-50cm long, tubular, ovoid or subglobose, green or yellowish green, usually as long as leaves, male and female flowers separated by neuters, above the female and sometimes below the males, appendage cylindric, obtuse or narrowed to a fine point, green or purple; anthers subsessile, 4-celled; ovary oblong, 1-celled, ovules 1-2, basal, stigma sessile; berries ovoid or pyramidal, 1-2 seeded; seeds globose or ovoid, albuminous.