Hemiepiphytic; larger stems drying reddish brown, smooth, and coarsely striate at nodes, smaller stems drying light yellow-brown, glossy, and finely longitudinally ribbed, finally dark brown and transversely finely cracked; internodes short, 4--7 cm diam., broader than long; roots to 30 cm long, numerous per node, drying reddish brown, weakly glossy, and somewhat ridged; cataphylls 35--39 cm long, sharply 2-ribbed, red, broadly sulcate abaxially, persisting as pale brown fibers densely clothing the entire apex of the stem with tiny fragments of reddish brown epidermis persisting among the fibers; LEAVES: petioles 28--91 cm long, 1.5--2 cm diam., subteret, obtusely flattened adaxially, weakly 1-ribbed near apex, broadly and obtusely sulcate, to 3.5 cm diam. near base, dark green (reddish brown when young), drying reddish brown and matte, surface moderately glossy, prominently striate-lineate throughout; blades broadly ovate, moderately coriaceous, bicolorous, semiglossy, 26--86 cm long, 18--57 cm wide (1.2--1.5 times longer than wide), margins broadly and sparsely undulate, upper surface drying dark brown to gray-brown, lower surface drying reddish brown; sinus hippocrepiform to obovate, 4--18 cm deep; midrib flat and slightly paler than surface, drying convexand darker than surface above, convex, sometimes tinged reddish, drying obtusely angular, grayish brown, and sparsely short pale-lineate below; basal veins 7 per side, with the first and second free to base, the third through sixth veins coalesced to 7 cm, posterior rib barely naked near the base, weakly curved; primary lateral veins 5--6 per side, departing midrib at a 40--50º angle, drying reddish brown below, obtusely and deeply sunken, concolorous, drying raised and somewhat darker above, convex, more or less concolorous, drying concolorous, matte below; minor veins moderately distinct, drying prominulous above and below, arising from both the midrib and primary lateral veins, secretory canals appearing but not obvious below; "cross-veins" numerous, more or less transverse. INFLORESCENCES 2 per axil; peduncle 6--7 cm long, 1.5 cm diam., magenta, conspicuously white-striate toward the apex; spathe 15--16 cm long, weakly constricted midway, weakly glossy, moderately coriaceous, drying reddish brown both surfaces, acuminate at apex; spathe blade greenish white outside, white, tinged reddish in lower half inside; spathe tube inflated, dark maroon outside, to 7 cm long, 5.8 cm diam., dark maroon inside; spadix 15 cm long; pistillate portion 3.5--5 cm long in front, 3.3--3.7 cm long in back, 2--2.5 cm diam. at apex, 2.3--3 cm wide at base; staminate portion 9--11.7 cm long; fertile staminate portion gradually tapered toward apex; sterile staminate portion 2.5--2.6 cm diam.; pistils 3.2--3.5 mm long, creamy brown, ovary 5-locular, ca. 0.4 mm long, with parietal placentation; ovules 25--30 per locule, 2--3-seriate; funicle ca. 0.2 mm long, style 1 mm diam., similar to style type B; style apex flat, with small depressions; stigma 1.3--1.5 mm diam., 0.4 mm high, covering entire style apex; the androecium margins sharply 4--6-sided, 0.6--1.2 mm diam. at apex; sterile staminate flowers rounded to bluntly 4--6-sided, larger toward the base, 0.6--2.8 mm wide.