Terrestrial, sometimes epiphytic, climber to 3 m tall. Stems obtusely angular, 3.5-6.5 mm diam. Leaves coriaceous, sessile, blade oblong or narrowly elliptic-oblanceolate, apex rounded to acute, base cuneate, clasping the stem for 1/2-3/4 its circumference, auriculate, auricles 2-4 mm wide, shortly decurrent for 3-4 mm at an angle of 45°; basal rosette leaves not seen; leaves of short stems subspathulate, ± 15.5-35 by 1.8-4 cm; leaves of climbing stems shorter and more oblong, 4-10.5(-11.9) by 1.5-2.3(-2.7) cm. Longitudinal nerves 3 or 4 on each side of the midrib in the marginal 2/3 of the blade, obscure except in lower leaves. Pennate nerves numerous, at 50-90° from the midrib, overlapping the longitudinal nerves. Lower pitchers ovoid or broadly cylindrical and slightly ventricose, 13-15 by 6-8 cm, with two fringed wings 3-4 mm broad, fringed elements 5-7 mm long, 3-5 mm apart; mouth ovate, acute near lid, oblique, at ± 45° to the pitcher axis, concave; peristome flattened, 5-10 mm wide, ribs conspicuous, 0.5 mm apart, interspersed with 10 striae, outer edge not sinuate, inner edge with teeth 0.7-1.25 mm long; lid suborbicular, usually oblate, 5.5-5.7 by 5.7-7 cm, apex rounded, base ± deeply cordate, lower surface appendages absent, nectar glands numerous, round to elliptic, crater-like, 0.5-0.7 mm diam., each with a low, thin pale margin; spur flattened, 8-20 mm long, apex entire or divided into 2 or 3 lobes each c. 2 mm long. Upper pitchers as the lower but slightly infundibulate and abruptly contracted immediately below the peristome, rarely infundibulate in the lower half and constricted, then cylindrical in the upper, 9-14(-18) cm high, 1.8-2 cm wide at the base, 4-4.7 cm wide below the peristome, with two ribs < 1 mm wide; mouth horizontal at front, abruptly vertical at lid end; peristome flattened, 1-10 mm wide, ribs 0.3-0.6 mm apart, c. 0.5 mm high, outer edge entire, inner edge with teeth 1 mm long; lid broadly ovate, often broader than long, 2.4-5.5 by 2.7-5.5 cm, apex rounded, base cordate, lower surface with nectar glands crater-like, orbicular, (0.3-)0.4-0.6(-1.25) mm wide; spur ± 4 mm long. Male inflorescence 14-26 cm long; peduncle 8-13 cm long; partial peduncles 30-40, 2-flowered, 2-5 mm long; bracts 1.5-3 mm long; pedicels ± 6 mm long; tepals oblong, ± 4 by 2.5 mm; androphore 2-3 mm long; anther head 1-1.5 mm wide. Fruit valves 14.5-20 mm long. Seeds fusiform, ± 12 mm long, tuberculate at centre. Indumentum of stem and leaves lacking, except midrib and young stem with dense, stout, erect, white or red hairs, 0.2-0.3 mm long, sparsely branched; pitchers with appressed simple white or coppery hairs 1 mm long, or glabrous; inflorescence axis with appressed simple copper-coloured hairs. Colour of lower leaf brown when dry; pitchers pale green, often the upper half white or cream, mottled with red, sometimes the whole purplish red with darker blotches; inner surface waxy white with red blotches; lowers pale green, red or waxy brown
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