Epipetric; internodes up to 10 cm long, 1-1.5 cm diam., olive-green to brownish, semiglossy, more or less terete; cataphylls green, unribbed, deciduous. LEAVES erect-spreading; petioles 12-33.5 cm long, 11 mm diam. (dry), moderately spongy, obtusely flattened near base, terete midway, weakly flattened near apex, weakly short, dark-lineate, semiglossy; blades ovate, weakly coriaceous, 12-33 cm long, 7.5-19 cm broad, broadest at base, acute at apex, cordate at base; anterior lobe 16-28 cm long, the margins convex; posterior lobes 5.5-8.5 cm long, directed slightly outward to straight back; sinus parabolic; upper surface semiglossy, dark green, paler below; midrib flat and con-colorous above, convex and concolor-ous below, drying broadly raised above, convex below with minute ridges; basal veins 3 pairs, the first free to base, the second and third basal veins coalesced 8-20 mm; posterior rib naked 8-20 mm; primary lateral veins 3-4 per side, narrowly sunken above, convex below, departing midrib at 60-70° angle, scarcely curved to margin, drying slightly raised below, flat but visible above; interprimary veins drying barely visible above, inconspicuously raised below; secondary veins distinct, drying visible on both surfaces. INFLORESCENCES 2 per axil; peduncle dark green, 4.5-7 cm long, 2.5-5.5 mm diam. spathe coriaceous, 8-12 cm long (twice as long as tube), moderately glossy, medium green on outer tube, merging imperceptibly with cream on blade, inner surface pale greenish white throughout; spadix 8-10 cm long; pistillate portion pale green, 3-4 cm long, 8 mm diam.; staminate portion scarcely constricted; 3.7-4 cm long, 9 mm. diam. at base; flowers (dried, 13-14 per spiral; pistil ellipsoid with fibrillate skirt beneath the stigma, 0.6-1.2 mm diam.; stigma round to ellipsoid, ca. 0.3 mm wide ca. 1 mm long, drying black with a depression at center.