Appressed-climbing hemiepiphtye; internodes short, 5-6 cm long, to 3 cm diam., drying dark yellow-brown, narrowly ridged longitudinally; cataphyll 22 cm long, sharply 2-costate, medium green, obscurely darker green-lineate, marcescent and persistent semi-intact at least at the upper nodes, drying light yellowish brown, soon deciduous. LEAVES: Petioles 43 cm long, subterete, medium dark green and semiglossy, obtusely flattened adaxially, unmarked, drying dark brown to blackened, 8-10 cm diam., matte. Leaf blades broadly ovate, 42.5 cm long, 28.5 cm wide, 1.5 times longer than wide, subcoriaceous, dark green and weakly glossy to semiglossy above, slightly paler and semiglossy below, abruptly short-acuminate at apex, deeply lobed at base, drying dark blackish brown above, slightly paler and dark yellow-brown below; anterior lobe 32.5 cm long, the margins broadly convex; posterior lobes 12.5-14 cm long, 10 cm wide; basal veins 6 to 7 pairs, the 1st pair free or nearly so to base, 3rd and higher order basal veins coalesced 1.5-4 cm; posterior rib scarcely naked, mostly to ca. 1 cm; midrib broadly convex and concolorous to slightly paler above, convex to narrowly rounded and slightly paler below, drying slightly darker than surface above, moderately darker and irregularly and finely striate below; primary lateral veins 6 pairs, arising at 55° angle near apex, to 65°-85° angle in lower half of blade, convex, darker than surface, sometimes drying blackened and much darker than surface; minor veins moderately indistinct with a few visible, drying close and fine but not markedly visible. INFLORESCENCES 3 to 7 per axil; peduncle (1.5)4-7.7 cm long, 9 mm diam., pale green at base, darker green toward apex, dark brown to blackened on drying; spathe white at an-thesis, becoming pale green, greenish white and glossy inside, 4.5-5.5 cm long, 6-9 mm diam., abruptly pointed at apex, drying blackened to dark brown; spadix 4.8-5.2 cm long; staminate portion 1.2-2.1 <;m long, 6 mm diam.; sterile staminate portion not obvious on live material; pistillate portion 3.0 cm long in front, 2.3-2.6 cm long in back, 6.5-7 mm diam. at base, 6.0 mm diam. at apex. Pistils bottle-shaped, subterete to rhombic in cross section, the upper 1 mm tapered inward, 1.0-1.7 mm diam.; locules 4 to 5 per ovary; ovules 1 per locule, 0.6-0.9 mm long, 0.3-0.4 mm diam.; placentation basal; funicle shorter than ovule; stigma 0.5-0.7 mm diam., 2-3 mm thick; androecium 1.0-1.7 mm diam., broadly convex at apex, subrounded to irregularly angular, 4- to 5(6)-sided, the angles broadly rounded. Fruits not known.