Terrestrial climber to several metres tall. Stem of the climbing shoots more or less D-shaped in section, 0.8 cm diam. with a pair of prominent ridges or wings, or terete, internodes to 16 cm long; rosette and short stems unknown. Leaves coriaceous, petiolate; blades of climbing shoots lanceolate to obovate-lanceolate, 39-54 by 5-9 cm, apex acute to rounded-emarginate, base attenuate to the winged and decurrent petiole; petiole 5-9 cm long, winged, clasping the stem for 1/2 its circumference, usually decurrent as two wings or ridges almost to the node below. Longitudinal nerves 6-8 on each side of the midrib, in outer 3/5 of blade. Pennate nerves numerous, more or less parallel, at 60-70° to midrib. Lower pitchers globose throughout, or ventricose in lower half, tubular above and narrowing to mouth; up to 23 by 6 cm; with fringed wings to 4 cm broad, fringe elements to 6 mm long; mouth oblique. Upper pitchers wholly infundibulate, or cylindrical, scarcely ventricose below, 18-30 by 4-6 cm, without wings; mouth oblique, and often raised at front; peristome rounded at front, to 1.2 cm wide, flattened towards lid, or flattened and irregular throughout, then 0.5-1.5 cm wide, ribs 0.2 mm apart, c. 0.1 mm high, outer edge entire, inner without teeth, but with conspicuous glands between the ribs; lid orbicular to elliptic, 6-9.5 by 3.5-7.5 cm, apex rounded, base cordate, lower surface lacking appendages, nectar glands orbicular, thinly bordered, dense over the whole surface, 0.2-0.5 mm diam.; along midline larger, elliptic, 0.7-0.9 mm long; spur simple, 0.8-1.4 cm long. Inflorescence to 28 cm long; partial peduncles 1-or 2-flowered, 0.5-0.8 cm long; pedicels about as long as partial peduncles; bracts infrequent; tepals 5-6 by 3 mm. Fruit with valves 44-56 by 3.5 mm. Seeds fusiform, 26 by 0.75 mm. Indumentum of brown simple and branched hairs 0.1-0.2 mm long on all parts, especially in leaf axils of stems, and on tendrils; dense below leaf margin and on all new parts; glabrescent. Colour of lower pitchers brownish red, peristome green or red-streaked; upper pitchers pale green.
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