Terrestrial climber to 10 m tall. Stem terete, 3.5-5 mm diam., internodes 2-5 cm long on climbing part; axillary buds inconspicuous. Leaves chartaceous, sessile, those of climbing stems oblanceolate-ligulate 14-28 by 1.7-3.6 cm, apex acute, base more or less parallel-sided, clasping the stem by a 1/3-1/2 its circumference, then decurrent in two wings, each 3 mm wide, extending 2-3 cm below the node, sometimes converging to only 4 mm apart on the opposite side to the leaf blade. Leaves of short stems and rosettes oblong-spathulate, up to 16 by 3.2 cm. Longitudinal nerves 4 or 5 on each side of the midrib, in the outer half of the blade, conspicuous. Pennate nerves numerous, at 45° from the midrib, branching sporadically, proceeding more or less straight to the margin, conspicuous on the upper surface. Lower pitchers ovoid in the lower 1/2-2/3, cylindrical towards the mouth, 8.5-16 by 3.5-8.5 cm (the cylindrical portion 2.2-3.8 cm wide), with two fringed wings each 2-4 mm broad with fringed elements 3-7 mm long, 2-4 mm apart; mouth oblique, ovate, 3-5 by 1.5-2.5 cm; peristome rounded, 1.5-2 mm wide in the front, or more usually unevenly flattened, 2.5-8.5 mm wide at the sides of the mouth, ribs 0.3-0.5 mm apart, conspicuous, about 0.1 mm high, outer edge with one or two shallow lobes, inner edge lacking teeth; lid broadly ovate to suborbicular, 2.6-3.7 by 2.5-3.2 cm, apex rounded or truncate, slightly retuse, usually with a slight fold, base slightly cordate; lower surface lacking appendages, glands sparsely scattered, absent from the midrib area (in a band c. 6 mm wide) and the marginal 2 mm, shortly elliptic or circular, crater-like, 0.2-0.3 mm long; spur unbranched, straight or curved, 3-4(-5) by 0.8 mm. Upper pitchers subcylindrical, slightly inflated in lower third, 18 by 4 cm (2.9 cm wide in the upper part), with two ridges 0.1-0.2 cm broad, lacking wings with fringed elements, otherwise as the lower pitchers. Male inflorescence 67 cm long; peduncle 18 cm long; partial peduncles c. 130, 2-flowered, 2.5-3(-4) mm long; bracts absent; pedicels 5-9 mm long; tepals 3-3.5 by 2-3 mm; androphore 3-4 mm long; anther head 1.25(-1.75) mm wide. Fruits and seeds unknown. Indumentum of sessile glands on lower surface of leaves and on exterior of pitchers; exterior of pitchers with scattered, unequally 2-5 armed red hairs 0.1-0.4 mm tall; inflorescence and lower surface of tepals pubescent with dull red-brown erect hairs 0.1-0.2 mm long. Colour of stems pale greyish brown with white waxy bloom; petioles red or green; pitchers green, speckled maroon in lower half, maroon speckled green in upper half; peristome maroon, inside of pitcher and lid green speckled maroon or entirely red, sometimes the whole pitcher maroon; flowers brown.
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