Terrestrial climber 1-5 m tall. Climbing stems sub-angular (-terete), 0.2-0.5 cm diam., internodes 0.5-1.5(-8) cm; axillary buds inconspicuous. Leaves thinly coriaceous, sessile, those of climbing stems lanceolate to oblanceolate, 5-10(-16) by 1-1.5 (-2) cm, apex acute, base cuneate, amplexicaul, clasping the stem for 1/2 its circumference, slightly auriculate, not decurrent; rosette leaves oblanceolate, 4-7 by 1-1.5 cm. Longitudinal nerves 0-3 on each side of midrib, in outer half of blade, fairly conspicuous. Pennate nerves inconspicuous. Lower pitchers infundibuliform below, cylindrical above, 5-10 by 1-3.5 cm with two fringed wings c. 2 mm broad, fringed elements to 3 mm long, 0.5-1.5 mm apart, otherwise as upper pitchers. Upper pitchers infundibuliform below, abruptly narrowing at 1/2-3/4 height and then cylindrical, but gradually broadening to mouth, 6-15(-17.5) by 0.9-2.8 cm, wings absent; mouth elliptic, oblique, concave; peristome slightly flattened in cross section, 1.5-3 mm wide; lid orbicular to broadly ovate, 1.2-2.3 by 1.2-2 cm, apex rounded, base cordate, lower surface lacking appendages, nectar glands circular, bordered, 0.4-0.5(-0.7) mm diam., more or less even-sized, sometimes interspersed with smaller glands 0.15-0.2 mm diam.; spur 2-3 mm long, flattened, unbranched, slightly curved. Male inflorescences 23-27 by 2-2.5 cm; peduncle 9-10 cm long, 1-1.5 mm diam.; partial peduncles 2-flowered at base, 1-flowered at apex, 50-65, 1-4 mm long; bract inserted between rhachis and apex, filiform, 2-6(-8) mm long, spreading; pedicels 4.5-7 mm long; tepals elliptic 3.5-4 by 2 mm; androphore c. 2.5 mm long; anther head c. 1.5 by 1.5 mm. Fruit valves c. 18 by 3 mm. Seed fusiform, 9-10 mm long, central body smooth. Indumentum of very short simple hairs, < 0.05 mm long, sparse or absent from stems and leaves; axils sparsely pubescent, pitcher including lid and inflorescence likewise. Colour of lower pitchers deep purple to blackish green; upper pitchers pale green in lower part, becoming pale yellow to ivory-white above, with rose coloured markings throughout, rarely purple.
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