Terrestrial climber to 5 m tall. Stem ± terete or rounded-triangular, 0.15-0.4 cm diam., usually zigzagging slightly, with prominent axillary buds 0.5-1 mm long, basal rosettes unknown. Leaves coriaceous, sessile, often reflexed; leaves of climbing stems narrowly elliptic or oblanceolate (4-)5.5-14 by 0.7-1.9 cm, apex acute, the basal third often distinctly constricted, c. 3.5 mm wide, clasping the stem for 2/3 its circumference, very shortly and obliquely decurrent, and slightly auriculate, the auricles reflexed. Longitudinal and pennate nerves inconspicuous. Lower pitchers very rarely collected, ± ellipsoid in the lower half, gradually tapering to the cylindrical upper half, c. 8.5 cm long, 2.7 cm wide at the base, 2.1 cm wide at the apex, with 2 fringed wings to c. 5 mm broad, the fringed elements to 0.4 cm; mouth ± ovate, oblique, peristome cylindrical, 0.5-0.75(-1.2) mm wide, with fine, raised ribs, outer edge entire, inner without teeth; lid broadly elliptic, c. 1.9 by 1.7 cm, apex rounded, base slightly cordate to truncate, lower surface lacking appendages, nectar glands numerous, dense over whole surface, minute, volcano-like or thickly bordered, 0.1-0.15 mm diam.; spur simple, unbranched, to 4 mm long. Upper pitchers as lower pitchers but very slightly ventricose, (4.5-)6-9.7(-13) cm long, 1.3-2.2 cm wide at the base, narrowing slightly to (0.5-)1.2-2.1 cm wide at the waist and expanding to (7.5-)1.5-2.5 cm at the mouth, with two ridges to c. 0.1 cm broad, lacking fringed elements. Male inflorescence 15-30 cm long; peduncle 7-14 cm long; partial peduncles 2-flowered, 4.5-6.4 mm long; bracts rarely present; pedicels 5.5-11 mm long; tepals 3-3.5 by 2-2.5 mm; androphore 2-2.5 mm; anther head 1 by 1-1.25 mm. Fruit with valves 16-35 mm long. Seeds fusiform, minutely tuberculate in the centre. Indumentum absent from the stems apart from distinct tufts of white hairs in the leaf axils; leaves glabrous when expanded, slightly hairy in bud; inflorescence with appressed stiff white hairs often sparse, extending to the androphore; ovary with sparse coppery hairs. Colour of stems light green to dark brown; pitchers light green or yellowish green with red parts; rarely wholly red or green; staminal column light green.
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