Terrestrial climber to 15 m tall, with many terrestrial and some aerial rosettes. Stem cylindrical, 1-1.5 cm diam., internodes 1.5-7 cm long. Leaves sessile or with a short, poorly defined petiole, blade thickly chartaceous, lanceolate to spathulate; rosette leaves 2-5 by 0.5 cm, climbing leaves c. 25 by 6 cm; apex acute, rarely acuminate, base attenuate, clasping the stem by 1/2 its circumference. Longitudinal nerves 3-5 on each side of the midrib, in the outer 1/3 or 1/2. Pennate nerves numerous, oblique, straight, nearly reaching the margin. Lower pitchers obliquely urceolate, semi-circular on dorsal side, almost flat ventrally, to 10 by 9 cm, with two fringed wings to 1.5 cm broad, the fringe elements 0.5-1 cm long, 0.2 mm apart; mouth oval, almost horizontal, straight; peristome flattened, to 1.5 cm wide, and sloping steeply inwards; lid narrowly oblanceolate, to 4 by 1.5 cm, apex rounded, base cuneate, lower surface lacking appendages, nectar glands extremely sparse, usually 6-12, sometimes absent, orbicular, broadly bordered, 0.4-0.5 mm diam., central pore c. 0.1 mm diam.; spur simple or branched, up to c. 10 mm long. Upper pitchers generally not developed, rudimentary, broadly infundibuliform, c. 2 by 2 cm. Male inflorescence a panicle to 40 by 4-5 cm; peduncle 2.5 cm long, 3 mm diam. at base; partial peduncles 8-12(-50) cm long, fasciculate at apex, (1-)3-6(-10)-flowered; bracts foliose, spathulate, 12-14 by 4-5 mm, inserted 0-2 mm from base of partial peduncles; pedicels 7-8 mm long; tepals broadly elliptic, 4-5 by 3-5 mm, androphore 3-5 mm long; anther head 2 by 1.5 mm. Indumentum densely velvety in young parts, under leaf blades, especially margins, on young pitchers and on the inflorescence; hairs red or brown, mostly simple, c. 0.3 mm long. Colour of pitchers usually green, deeply flecked with maroon, rarely entirely red, sometimes almost whitish yellow, with pale pink flecks, likewise the leaves of these pitchers may be a pale yellow-pink if buried beneath leaf litter; tepals green to yellow; indumentum deep red.
Damp shady-forest, in Borneo swamp and kerangas forest, in New Guinea Araucaria forest, also in secondary forest, open microphyllous vegetation, or swamp grassland; sea level to 200(-2100) m
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