The species is characterized by its long, glossy petioles with the unsheathed portion being moderately elongate. Herb, 50-75(120) cm tall; sap moderately foul-smelling; stems erect or partially reclining; inter-nodes 0.7-1.5 cm long, 1.5-2.5(4.0) cm diam., glossy to semiglossy, dark green to medium green, smooth, drying dark brown to light yellow-brown matte, moderately smooth; petiole scars 4-5 mm thick. Leaves erect-spreading, clustered at apex of stem; petioles 13 - 44 cm long (averaging 28.4 cm long), 1-1.5 cm diam. midway, sheathed 0.3-0.76 their length (averaging 0.48), very glossy as if varnished, rarely only semiglossy, dark green, drying orange-brown to blackened; sheath 14-34 cm long (averaging 14.3 cm long), erect to involute, acute and decurrent (but sometimes weakly elevated) at apex.