Hemiepiphytic climber, usually on the lower portion of tree trunks in full shade; sap clear, copious, drying reddish; internodes mostly short, from less than 1 cm long to 1.5 cm long, 6-12 mm diam., drying with smooth, semi-glossy, tan epidermis, the epidermis sometimes cracking and breaking free; cataphylls unribbed, medium green, short dark green-lineate, 6.5-14 cm long promptly deciduous; LEAVES with petioles 2-7.5 cm long, sheathed from 50% of to almost the entire length, the sheath inequilateral at apex, one or both sides free-ending; blades oblanceolate-elliptic, 22-46 cm long, 6.7-12.7 cm wide, abruptly to gradually long-acuminate at apex, frequently attenuated toward the base below the middle of the blade, narrowly acute to obtuse to narrowly rounded at base and also sometimes weakly attenuated near the base; upper surface dark green, semi-glossy to almost matte, drying usually grayish black above, sometimes grayish yellow; lower surface moderately paler and semi-glossy below, drying grayish black to grayish yellow-green to yellow-green below; midrib thickly convex, moderately to weakly paler than the surface on drying above, convex and darker than surface below on drying; primary lateral veins 4-7 pairs, departing midrib at very acute angle, then spreading at 40-60°, drying darker than surface on darker leaves, sometimes paler than surface on paler-drying leaves; minor veins moderately obscure on drying except on paler-drying blades. INFLORESCENCES 1-4 per axil; peduncles 2-4(5) cm long, 1-1.5 mm diam.; spathe 4.5-7.5 cm long, 5-10 mm diam., green, drying dark brown to blackened, scarcely constricted above the tube (constriction ca. 3/4 of the length of the entire spathe); spadix 4-7 cm long, white, drying 3.2-3.4 mm) diam. midway, 3-3.2 cm diam. at apex and base; staminate portion 3-4.2 cm long., 3.2-3.4 mm diam. midway, 3-3.2 mm diam. at base; sterile staminate portion 7.5-8.5 mm long, 3-3.2 mm diam. INFRUCTESCENCE with peduncles 6.5-8 cm long; fruiting portion of spadix drying 5.3 cm long, 1.2 cm diam.; berries whitish.
Tropical moist forest (bh-T).
Ranges from southern Colombia (Putomayo) to Ecuador (Napo, Pastaza), Peru (Loreto and western Brazil (Amazonas).