Terrestrial climber to 6 m tall, but often sprawling on ground. Stems terete, 5-7(-9) mm diam.; short shoots with internodes 0.5-1 cm long, climbing shoots with internodes 3-5.5 cm long. Leaves chartaceous, subpetiolate; leaves of short stems with blade oblanceolate, 12-21 by 3-5 cm wide, apex acute to obtuse, base gradually attenuate into a poorly defined, winged leafstalk c. 1 cm wide, amplexicaul, clasping the stem for 3/4 its circumference, shortly decurrent, rarely sheathing; leaves of climbing stems with blade narrowly elliptic-oblong, 13-33.5 by 2.5-5 cm, apex acute, base cuneate, the lowermost 1/5-1/6, resembling a winged petiole 2-3.5 cm long, usually narrowed to 1-1.5 cm wide and encircling 1/2-1/3 the stem circumference, not sheathing or de-current. Longitudinal nerves 3 or 4 on each side of the midrib in the outer 1/2 or 1/3, conspicuous above and below. Pennate nerves numerous, arising at 45-60° from the midrib, becoming patent, not reaching the marginal vein. Lower pitchers ovoid and tapering into a shortly cylindrical upper part, or the whole ovoid or ellipsoid, 9-18 (-23) cm long, 3.8-7(-9) cm wide at the base, tapering to 2.5-4(-5) cm wide below the peristome, with two fringed wings 2.5-5(-8) mm broad, the fringed elements 3-6(-15) mm long; mouth ovate, apex long-acuminate, oblique, slightly convex; peristome cylindrical to slightly flattened, 1.5-7(-15) mm wide with pronounced ribs 0.3-0.5 mm apart, 0.1-0.2 mm high, outer edge often slightly sinuate in the largest pitchers, inner lacking teeth; column short and broad, the peristome forming two ridges; lid broadly to narrowly ovate or elliptic, 2.5-4.5(-5.5) by 1.7-4.5(-5) cm, apex rounded, base shallowly cordate, lower surface without appendages, nectar glands with several large circular or elliptic crater-like glands 0.3-0.7 mm long along the midrib and numerous smaller, circular ones 0.2-0.1 mm diam. scattered over the blade, smallest towards the margin, absent at the edge; spur dorsiventrally flattened, 4-7(-12) by 0.7-1 mm, divided by 1/3 its length into 2 (or 3) branches, rarely entire. Upper pitchers as the lower, but much more infrequent, less inflated, with reduced wings and generally smaller, ovoid at the base, cylindrical at the apex, 12-16 cm tall, c. 4 cm wide, the upper, cylindrical part 2.5-3 cm wide, wings 1-2 mm wide, usually fringed, fringed elements 2-5 mm long; peristome 1.5-5 mm wide, ribs 0.25 mm apart; outer edge entire, not sinuate; lid 1.5-4.5 by 1-3.8 cm. Male inflorescence 26-39(-51) by 3-4 cm; peduncle 8.5-16.5 cm long, 0.2-0.5 cm diam. at the base; partial peduncles 2-flowered, 48-84, 2-3(-5) mm long; bract 1.3-3(-8) mm long, conspicuous, inserted anywhere between base and apex; pedicels 8-1.1(-1.3) mm long; tepals elliptic, 4-5 by 2-3.5 mm, apex rounded; androphore 3-4(-5) mm long; anther head 1.5-2 by 1.5(-2) mm. Fruits with valves 20-25 by 3.5-4 mm. Seeds filiform, dimensions unrecorded. Indumentum absent from stems; lower leaf blade, outer pitcher, upper and lower lid and peduncle with sessile red glands, outer pitcher also very sparsely scattered with patent simple hairs c. 0.5 mm long; rhachis of inflorescence to the lower surface of the tepals moderately densely tomentose with appressed brown hairs c. 0.5 mm long. Colour of lower pitchers green or pinkish green, often splashed with red; peristome green with deep pink stripes; inner surface of pitcher with a waxy bluish pink bloom with darker purple blotches; upper pitchers always green; tepals brown or yellowish green.
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