Terrestrial or epiphytic shrub or low climber to 4 m tall. Stem usually winged, sometimes partly terete, 7-10 mm diam. Leaves thinly coriaceous, sessile, narrowly oblong to oblanceolate, 20-60 by 3.5-7 cm, apex acute or obtuse, base attenuate, clasping the stem by c. 1/2 the circumference and decurrent into two wings 3-7 mm wide extending half to one internode down the stem. Longitudinal nerves 6 or 7 on each side of the midrib in the outer 2/3, ± evenly spaced. Pennate nerves oblique, numerous, branching and inconspicuous near the margin. Lower pitchers broadly ovoid, to 31 by 16 cm, with two fringed wings, 7-14 mm broad, fringed elements 7-8 mm long, 1-4 mm apart, mouth elliptic, slightly oblique, straight; peristome flattened, 8-27 mm broad, ribs ± 1 mm apart, 0.5 mm high, outer margin sinuate, inner with teeth as long as broad; lid broadly ovate, 6-12 by 5-9 cm, apex rounded, base shallowly cordate, lower surface glossy, lacking appendages but midline carinate at base, nectar glands minute, inconspicuous, thinly scattered, pit-like, orbicular, 0.2-0.3 mm diam.; spur 10-12 mm long. Upper pitcher as the lower, but 20-26 by 9 cm, lacking fringes to the wings. Male inflorescence 30-51 cm long; peduncle 9.5-14 long, 0.6 cm diam. at base; partial peduncles 7-9 mm long, those at the base 2-flowered, at the apex sometimes 1-flowered; bracts absent; pedicels 14-15 mm long; tepals elliptic, 4 mm long; androphore 4-5 mm long; anther head 1 mm wide. Fruit unknown. Seed unknown. Indumentum absent from stems and leaves. Pitchers with sparsely scattered appressed simple hairs 0.75 mm long. Inflorescence minutely puberulent. Colour green, inner surface of pitcher glossy, splashed with red, peristome red.
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