Terrestrial shrub or climber to c. 5 m tall. Stems of short shoots terete, 0.9 cm diam., internodes c. 2 cm long; tall shoots with internodes 2-3 cm long, (0.7-)1.1 cm diam., slightly 2-winged or 2-ridged, axillary buds spike-like. Leaves chartaceous, petiolate, those of short stems oblong, 18-19(-28) by 10 cm, apex broadly acute, not peltate, base abruptly attenuate; petiole canaliculate, 6.5-10 by 0.5 cm, sheathing and clasping the stem for 5/6 of its circumference; leaves of tall shoots lanceolate or oblong-lanceolate, 16-26 by 3.8-6.5(-7) cm, apex acute, peltate by 1-2 mm or not peltate, base gradually attenuate; petiole 3-7.5(-10) cm long, 0.75-1(-1.7) cm wide at the base, sheathing and clasping the stem for 1/2 its circumference, then decurrent in two appressed or patent wings, each up to 2 mm wide, descending to the node below as an arc, diminishing to ridges. Longitudinal nerves 2(-4) on each side of the midrib in the outer 1/3-1/2. Pennate nerves numerous, oblique, straight, reaching the margin. Longitudinal and pennate nerves fairly conspicuous above and below in short stem leaves, inconspicuous in tall shoot leaves. Lower pitchers 17-22 cm long, ellipsoid in the lower half, c. 4 cm broad, contracted to 2 cm at the centre, the upper half cylindrical to slightly infundibulate, c. 3 cm broad at the mouth; with two fringed wings 3 mm wide, fringed elements 5-7 mm long, 1-5 mm apart; mouth ovate, highly concave and oblique, rising abruptly at the rear to form a column; peristome subcylindrical, 5 mm wide, ribs conspicuous, 0.2 mm high, 0.5 mm apart, the outer edge infrequently sinuate-lobed, lobes to 5 mm long, inner edge toothed near the column; lid ovate, 5.5 by 3.5 cm, apex round-ed, base truncate to cordate, lower surface with a long keel, 2-3 mm high, along the midrib, but lacking a protruding appendage, nectar glands as in upper pitchers, 0.2 mm diam., sparsely scattered over the entire surface; spur dorsiventrally flattened, 6-8 by 1 mm, apex rounded. Upper pitchers entirely cylindrical, narrowly infundibulate, or ellipsoid in the lower 1/4-1/3 and cylindrical above, 15-30 cm tall, 4-6 cm wide, lacking fringed wings, but with two ridges c. 0.5 mm wide; mouth ovate or orbicular, oblique, slightly to markedly concave, rising at the back to a short column, peristome subcylindrical, the outer part flattened, 9-28 mm wide, ribs conspicuous, c. 0.2 mm high, 0.5-0.75 mm apart, the outer edge deeply or shallowly undulate-sinuate, with up to 7 lobes per side, inner edge slightly toothed at the column; lid orbicular, 3.8-6.2 by 5-6.5 cm, apex rounded, base cordate, lower surface with a keel along the midrib 8-12 by 1-2 mm high, with an appendage up to 3 mm high; nectar glands circular, 0.2-0.4 mm diam., broadly bordered, either evenly scattered, moderately densely, over the surface of the lid, or, the largest glands densely concentrated in two arms diverging from the keel towards the apex, the remainder of the lid with smaller, sparsely scattered glands; spur as in lower pitcher. Inflorescences incompletely known, rhachis with 2-flowered partial peduncles at base, 1-flowered above. Male inflorescence known only from fragments, partly 1-flowered and partly 2-flowered, partial peduncles 1-2 mm; bracts absent; pedicels 7-9 mm; tepals oblong-elliptic, 4-4.5 by 1.5-2 mm, reflexed; androphore 3.5 mm; anther head 1.5 by 1.5 mm. Infructescence 91 by 7.5 cm; peduncle 51-55 cm long, 1-1.2 cm wide at the base; partial peduncles 4-10 mm long; bracts absent; pedicels 7-14 mm long. Fruit with valves 25 by 2.5 mm. Seed filiform, 24 by 0.5 mm. Indumentum of stems obscurely simple, branched and substellate red-brown hairs 0.2 mm long, mixed with sessile glands; midrib above, edges of petiole and wings of stems with pale brown simple and branched hairs 0.5-0.7 mm long; lower surface of leaves with sessile glands only; male inflorescence axis white-puberulent as the stem, androphore glabrous. Colour of dried stem and leaf blackish grey; pitchers pale or yel-lowish green splashed lightly to heavily with red to purple; inflorescence colour unknown.
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