Stem scandent, upper internodes 2-3 cm long, 1-1.2 cm thick. LEAVES of adult shoots with terete petioles up to 50 cm long, 7-8 mm thick at base, 5-6 mm at top. Blade thinly coriaceous, hastate-trilobed, between the posterior and anterior lobes scarcely or slightly sinuate, posterior lobes oblong obtuse, sinus rectangular or obtuse, spreading, 15-20 cm long, 6-10 cm wide, anterior lobe triangular or oblong, acuminate, 20-30 cm long, 12-16 cm wide, primary lateral veins 5 on both sides of the anterior lobe, arcuate ascending; On the lower side of the posterior lobe 3, in the upper part, 4-5, departing from the robust rib at an acute angle, all curving upwards towards the margin. INFLORESCENCE: Peduncle slender 2-3 cm long. Spathe white-green, convolute, tube oblong-ovoid, 3-4 cm long, 2 cm wide. Spathe-blade oblong-acute, 5 cm long, 2-2.5 cm wide, spadix white, female part cylindric, 4 cm long, 1 cm thick, male part 5-6 cm long, slightly thicker than female part. Pistills ovoid, 1.5-2 mm long, a rounded corona at the top, locules many ovulate, nearly basal.