Terrestrial climber to 5 m tall. Stem erect, strongly triangular, 4-5 mm diam., internodes 7-8 cm long, axillary buds rounded, projecting less than 1 mm c. 4 mm above the node. Leaves thickly coriaceous, sessile; oblong-elliptic, 4.5-8.6 by 1.5-3 cm, apex rounded to obtuse, base clasping the stem and adnate, decurrent to 2 cm below the node. Longitudinal nerves 4 or 5 on each side of the midrib, closer together near the margin, conspicuous above and below. Pennate nerves obscure. Lower pitchers unknown. Upper pitchers subcylindrical; 12-25 by 2-5 cm; the basal 1/5 swollen, ellipsoid, in the larger pitchers to 4-5 cm wide, the mouth about the same diameter, both tapering gradually to 2-2.5 cm at the centre of the pitcher; with two ridges to 0.1 cm broad lacking fringed elements; the inner pitcher surface glaucous; mouth ovate, oblique; peristome cylindrical to slightly flattened in section, 1.5-2 mm wide, with very low ribs 0.1-0.2 mm high, 0.4-0.5 mm apart, outer edge not sinuate, the inner edge appearing entire; lid ovate to obovate, 2.7-5.5 by 2-4 cm, apex rounded, base rounded-truncate, lower surface without appendages, nectar glands crater-like, small, rounded, with lumina c. 0.15 mm diam., 320-440 per cm2; spur simple, stout, blunt and slightly flattened, to 9 by 1.5 mm, or filiform with numerous branches, to 9 mm long, puberulent. Male inflorescence to 9 cm long; peduncle to 2.3 cm long; partial peduncles 1-flowered; bracts absent; pedicels 0.4-0.7 mm long; androphore to 2 mm long; anther head to 0.9 mm wide. Infructescence c. 11 cm long; peduncle c. 5 cm long; pedicels 4-7 mm; tepals oblong, 4-4.5 by 1 mm, inner surface densely covered in raised elliptic glands. Fruits with valves 14-22 by 3-4 mm. Seeds filiform, 10 by 1 mm. Indumentum of short dense pale brown velvety, erect 3-5-branched hairs 0.25-0.5 mm long; persisting on stems, midrib and inflorescence axis; leaf blade glabrous; pitcher inconspicuously hairy with scattered appressed, simple white hairs 0.1-0.3 mm long; lid subglabrous; fruit valves with strongly appressed white or brown hairs c. 0.5 mm long. Colour of stem and midribs black; pitchers green, sometimes suffused with red or with black streaks on the back side; inner surface pale green or almost white, glaucous; peristome green or bronze; fruits brown.
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