Plants often large and robust, as much as a meter high; petioles 20-50 cm. long, stout, geniculate 2-2.5 cm. be-low the apex, usually vaginate to the middle or higher; blades oblong-lanceo-late or elliptic-oblong, 20-50 cm. long and 10-16 cm. wide or even larger, short-acuminate or caudate-acuminate, narrowed to the usually very acute base, the primary lateral nerves numerous, as-cending at a rather wide angle; peduncles sometimes a meter tall but usually short-er, stout; spathes white or greenish, ellip-tic or obovate-lanceolate, usually about 20 cm. long and 6-7 cm. wide but often smaller or larger, long-acuminate, long-decurrent upon the peduncle; stipitiform portion of the peduncle commonly ad-nate for 4-5.5 cm. and free for 0.5-1.5 cm.; spadix cylindric, very obtuse, usual-ly 5-7 cm. long and 2 cm. thick; pistils ovoid-conic, twice as long as the perianth or longer, about 6 mm. long, the cells 6-to 8-ovulate.
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