Terrestrial climber to 15(-40) m tall. Stems terete, rarely slightly angular, those of climbing stems 4-7(-8) mm diam., internodes 1.5-10 cm long, axillary buds inconspicuous. Leaves thinly coriaceous, sessile or subpetiolate; rosette leaves usually highly reduced, narrowly oblong to oblanceolate-elliptic, 3-5 by 1-1.2 cm, apex acute, base sessile, clasping the stem for 1/2 its circumference, rarely the rosette leaves larger, 8.5-12 by 2.5-3.7 cm; short and climbing stem leaves narrowly elliptic, (10-)23-26 (-30) cm long, apex acute, base attenuate, (5-)7-12 mm wide, usually with a petiole-like part 4-5 cm long. Longitudinal nerves 3 or 4 on each side of the midrib in the outer 3/4, fairly conspicuous above. Pennate nerves oblique, highly branched, inconspicuous. Lower pitchers ellipsoid, the mouth occupying the upper 1/3-1/4, (3-)6-11.5 by (2.2-)4-4.5 cm, with two fringed wings 5-7 mm broad, fringed elements 3-5 mm long, c. 1 mm apart; mouth oblique, concave, raised at the rear into a short vertical column; peristome flattened, 6-7(-9) mm wide in the rear half of the mouth, 2-3 mm wide in the front half, ribs 0.5 mm apart, c. 0.1 mm high, the outer edge entire, the inner with curved teeth, 1-2(-3) mm long in the rear half of the mouth, absent in the front half; lid ovate, 3-4 by 2-3 cm, apex rounded, base cordate, lower surface lacking ap-pendages but with a raised midrib, nectar glands circular, bordered, 0.3 mm long, confined to the midline or widely scattered, the midline often with larger, elliptic glands 0.6 mm long; spur filiform, 4-5 mm long, entire. Upper pitchers subcylindrical, 6-10(-19) by 1.7-2.8(-4.5) cm, slightly inflated in the lower 1/3, rarely slightly infundibular, usually with two fringed wings 0.5-2 mm wide, fringed elements c. 4 mm long, 1 mm apart; mouth slightly oblique, concave; peristome subcylindrical, 1.5-2 mm wide, ribs 0.5 mm apart, outer edge entire, inner with teeth inconspicuous; lid el-liptic or ovate, rarely orbicular, 2-2.5(-4.5) by 1.2-1.4(-5) cm, apex rounded, base cordate, lower surface often with a raised keel c. 1 mm long, at the base of the midline, nectar glands and spur as the lower pitchers. Male inflorescence 35-50 by 4 cm; peduncle 20-24 cm long, 3-4 mm diam. at base; partial peduncles 2-flowered, c. 70, 2-5 mm long; bracts absent or occasional; pedicels 3-5 mm long; tepals elliptic, 4-6 by 2-3.2 mm; androphore 3.5-4 mm long; anther head 1.5-2 by 2 mm. Infructescence c. 30 by 5 cm; peduncle c. 19 cm long, 4 mm diam. at base; partial peduncles c. 40; fruits with valves 13 by 3 mm. Seeds filiform, 6-15 mm long. Indumentum of sessile glands c. 0.1 mm diam. on stems, lower surface of the leaf blade and outer surface of pitchers; patent simple pale brown or white hairs 0.1-0.3 mm long on very young stems, densely on leaf edges, sparsely on the lower midrib, and upper pitchers including spur, dense to sparse on lower pitchers; inflorescence from peduncle base to lower surface of the tepals pubescent with brown, inclined, simple hairs 0.5-0.6 mm long, androphore minutely puberulent. Colour of pitchers reddish green to purple.
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