Terrestrial or epiphytic shrub or climber to 1-2 m tall. Stems of short shoots terete or slightly angular, 0.8 cm diam., internodes 1-2 cm long; climbing stems strongly 4-angular, 0.5-0.8 cm diam., internodes 2.5-8 cm long, axillary buds conical, 1 by 1 mm, 3 mm above the axil. Leaves coriaceous, sessile or petiolate; leaves of rosettes and short stems petiolate, blades spathulate-obovate, 17-25 by 5-7 cm, apex rounded, slightly emarginate or obtuse, barely peltate, base attenuate into a 4-7 cm long, petiolar portion, 0.8-1 cm wide, sheathing the stem and clasping it by 4/5 its circumference; leaves of climbing shoots sessile oblanceolate-oblong or spathulate-elliptic to spathulate (8-)10.5-18(-22) by (1.5-)3-4(-4.6) cm, apex acute, base gradually attenuate, or abruptly contracted into a subpetiolate oblong 3-4.5 by 1.5-2 cm, clasping the stem by 1/2 its circumference, the base more or less auriculate, the auricles nearly meeting on the opposite side of the stem. Longitudinal nerves 2 or 3 on each side of the midrib in the outer 2/3-1/2, fairly conspicuous. Pennate nerves inconspicuous. Lower pitchers ovoid-cylindrical, 16-19 by 5-6 cm, tapering to 3.5-4.5 cm wide at the mouth, with two fringed wings 3-6 mm wide, fringed elements 3-7 mm long, 1-3 mm apart; mouth narrowly ovate, oblique, concave, rising at the rear into a column; peristome flattened, 3-4 mm wide in the front half of the mouth, 2-3.5 cm wide in the rear half, ribs c. 0.7 mm high, 1 mm apart, outer edge with 3-6 shallow lobes on each side in the rear half, more or less entire in the front half, inner edge with teeth 3-5 mm long in the rear half, inconspicuous in the front half; lid ovate, (4.9-)6-6.5 by 3.8-5 cm, apex rounded, base truncate or shallowly cordate, the lower surface lacking appendages, but sometimes with a low keel along the midline, nectar glands circular or shortly elliptic (to elliptic on the midline), narrowly bordered, 0.4-0.8 mm diam., usually confined to the midline, rarely scattered over the entire surface; spur dorsiventrally flattened, 10 by 1 mm, divided by 3-8 mm into 3-6 branches. Upper pitchers either subcylindrical, slightly constricted in the middle, or, with the lower half broadly to narrowly ellipsoid and the upper half cylindrical, (10-)16-23.5 cm tall, (4-)5-6(-8.5) cm broad in the lower half, (2.5-)3-4(-5.5) cm broad in the upper half, with two unfringed narrow wings or prominent ridges 1-2 mm wide running the length of the pitchers; mouth less concave and oblique than the lower pitchers; peristome narrower, (0.5-)1-1.6 cm wide in the upper half, ribs shallower, 0.1-0.3 mm high, outer margin shallowly lobed; lid as the lower pitcher, but 5-5.5 by 4-4.5 cm, keel absent, nectar glands 0.3-0.6 mm diam.; spur unknown. Male inflorescences 14-24 by 2.5-3 cm; peduncle 6-6.5 cm long, 2-3 mm diam. at the base; partial peduncles 40-60, 1-flowered; bract filiform, 1.5-2.5(-5) mm long; pedicels 9-10 mm long; tepals oblong-elliptic, 4-5.5 by 2.5-3 mm; androphore 3-4 mm long; anther head 1.5 by 1.75 mm. Infructescences held horizontally, 16-25 by 3.5-7 cm; peduncle 11-15 cm long, 3.5-4.5 mm diam. at the base; fruits all held erect, 20-40. Fruit with valves 20-24 by 3-3.5 mm. Seed 11-15 by 0.5-0.75 mm. Indumentum of stems, lower leaf blade and pitcher with sessile red glands c. 0.1 mm diam.; pitcher matted or sparsely puberulent with simple or branched pale brown or white hairs 0.2-0.5 mm long; spur lightly white sericeous; inflorescence sericeous with fine white simple hairs 0.3-0.5(-0.7) mm long, sparse on peduncle, dense on rhachis to lower tepals; ovary golden with dense sericeous hairs; androphore glabrous. Colour of lower surface of leaf blade, orange-brown when dry; live pitchers green or green spotted light purple or red, with scarlet peristome.
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