Hemiepiphytic; stem appressed-climbing; internodes drying moderately glossy, irregularly and acutely ribbed with a few flat smooth intervening areas, 1--3.5 cm long, 1.5--2 cm diam., drying light brown; roots several per node, short, drying brown, to 3 cm diam.; cataphylls to 27 cm long, weakly 2-ribbed, but sharply 2-ribbed toward the apex, red tinged toward the base, drying dull reddish brown, deciduous. LEAVES: Petioles 19--21.5 cm long, drying 6--7 cm diam., subterete, dark brown, obtusely somewhat flattened toward the apex adaxially, surface smooth to weakly ribbed; blades somewhat inequilateral, oblong-oblanceolate, subcoriaceous, semiglossy, acuminate at apex, somewhat inequilateral and rounded to truncate to weakly cordulate at base, 32--39 cm long, 10--14 cm wide, broadest above the middle, 1.3--1.8 times longer than petioles, upper surface dark green, drying gray-brown, lower surface often somewhat reddish, drying medium brown; posterior lobes to ca. 2 cm long; midrib drying weakly and obtusely raised, slightly paler than surface above, drying convex, drying light brown with a distinct pale border along its edges and paler than surface below; basal veins 2--3 per side, and with all free to base; primary lateral veins 8--9 per side, departing midrib at a 65--80º angle in the lower one-half, to 45º angle toward apex, weakly arcuate to the margins, drying inconspicuous except near the midrib, paler than surface above, weakly convex and paler than surface, sometimes undulate below; minor veins drying moderately inconspicuous and close, weakly undulate, arising from the midrib only, the surface and minor veins minutely and densely granular at 10x magnification. INFLORESCENCES 1 per axil; peduncle to 9 cm long, drying 4.5 mm diam., dark brown; spathe moderately coriaceous, to 11 cm long, ca. 2 cm diam., pale green with pinkish tinge, drying dark brown throughout, white within; spathe tube 5 cm long, 1.8--2 cm diam.; spadix sessile; 10 cm long.; pistillate portion 5 cm long, drying to 1.7 cm diam. near base, 1.5 cm diam. midway, 1 cm at apex; staminate portion 4.7 cm long, too deteriorated for detailed studies; pistils 2.5--3 mm long, 1.5--2 mm diam., drying light brown, smooth except warty near apex; style type not studied; stigma 0.4--0.6 m diam., button-like on drying with a medial nipple and 4--5 radiate arms, sometimes with fragments of the dried stigma apron-like still attached; locules 4--5; ovaries with sub-basal placentation, 1 ovule per locule.