Terrestrial climber to several m tall. Climbing stems terete, 5-7 mm diam., internodes 5-7 cm long. Leaves thinly coriaceous, sessile or weakly petiolate, those of climbing stems lanceolate or narrowly elliptic, 15-30 by 2.5-5 cm, apex acute, base attenuate into a weakly formed petiole up to 4 cm long, semi-amplexicaul at base, not sheathing or decurrent. Longitudinal nerves 4-6 on each side of the midrib, running parallel in the outer 2/3 of the lamina, highly conspicuous. Pennate nerves running obliquely towards the margin, and there irregularly reticulate, inconspicuous. Lower pitchers, of the rosettes, obliquely ovoid in the lower part, gradually narrowed towards the mouth, 3-6 by 1.25-2.5 cm, 1-1.75 cm broad at the mouth, with 2 fringed wings over the whole length, 2-4 mm broad, fringe elements 1-2 mm long, 0.5 mm apart; mouth ovate, oblique, slightly concave; peristome cylindrical, 1-2 mm wide, ribs 0.5 mm apart, outer edge entire, inner edge conspicuously toothed; lid suborbicular 1-2 by 1-2 cm, apex round, base slightly cordate, lower surface lacking appendages, nectar glands densest in centre, absent from base of lid and marginal 2 mm, minute, orbicular, thinly bordered or volcano-like, 0.1-0.2 mm diam.; spur entire, dorsiventrally flattened, surrounded by filiform appendages. Upper pitchers subcylindrical, basal 1/3 slightly ventricose, upper 2/3 tubular or slightly attenuate and dilated at the mouth, 12-15 by 2.5-3 cm, with 2 narrow wings 1-3 mm wide, fringed or not, fringe elements up to 3 mm long, up to 2 mm apart; mouth broadly ovate, oblique, straight; peristome slightly flattened, 1-2 mm wide, ribs 0.5 mm apart, outer edge entire, inner toothed; lid orbicular, 2.5-3.5 by 2.25-3.25 cm, lower surface lacking appendages, nectar glands densely set near base of midrib, as lower pitcher. Male inflorescence c. 25 cm long; peduncles c. 6 cm long, 2 mm diam. at base; partial peduncles 1-flowered; bracts absent; pedicels 5-10(-15) mm long; tepals suborbicular 3 by 2.5 mm; androphore 3-4 mm long including the anther head. Fruit with valves lanceolate, 25-35 by 3-5 mm. Seeds filiform 12-15 mm long, centre transversely wrinkled. Indumentum absent from stem; leaf with midrib densely and shortly brown tomentose, leaf margin densely brown velvety hairy; pitchers densely and shortly stellately hairy when young, more sparse later; inflorescences densely brown tomentose when young, more sparse later, androphore sparsely hairy, fruit densely hairy. Colour of upper pitchers green, mouth and lid with red spots; lower pitchers more densely red spotted. Dried specimens a characteristic reddish brown colour.
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