Terrestrial climber to 3 m tall. Stem terete, 8-14 mm diam., internodes 3-5 cm long on climbing part; axillary buds inconspicuous, in sunken pockets. Leaves chartaceous, petiolate; those of rosettes and short stems, unknown; those of climbing stems narrowly oblong, 35-50 by 8-10.5 cm, apex rounded, not peltate, base acute and abruptly decurrent into the petiole; petiole winged, 3.5-8 by 0.6 cm, wings ascending, 3-4 mm wide, petiole base clasping the stem by about 2/3 its circumference and decurrent down the internode for c. 8 mm. Longitudinal nerves 4(-6) on each side of the midrib in the outer half, conspicuous on both surfaces. Pennate nerves numerous, arising at 70-80° from the midrib, slightly ascending, then proceeding towards the margin, branching, becoming highly reticulate, fairly conspicuous on both surfaces. Lower pitchers shortly ellipsoid to globular, 26 by 13 cm, the lowest part of the mouth 14 cm from the base of the pitcher, mouth c. 11 cm diam., body of pitcher with two fringed wings in the upper half of the pitcher only, 5.5 cm by 7 mm, fringed elements 8-9 mm long, usually paired, the pairs 2.5-3 mm apart, mouth circular to broadly ovate, oblique, abruptly arising in the rear to provide a stout column almost 5 cm high by 1.5-3 cm wide, in transverse section an isosceles triangle, the long sides being formed by the extended peristome, the apex with two rows of teeth, each tooth up to 8 mm long; peristome very broad, gently rounded in the middle, ribs laterally flattened, papery, highly pronounced, 1-5 mm high, 2 mm apart, with c. 10 striae parallel to and intermediate between each pair of ribs, outer edge of peristome flattened, 0.5-1 cm wide, shallowly sinuate, with 2-4 shallow, pointed lobes on each side or more or less entire, the inner peristome surface flattened, 2.5-3 cm long, held close to the inner pitcher wall at the mouth but slowly diverging from the wall towards the base of the pitcher, so as to form a funnel and ter-minating in stout, straight teeth c. 7 mm long on the inner edge below the mouth or up to 8 mm long on the column; lid ovate-elliptic, 6.5 by 4.5 cm, apex rounded, base gently rounded to shallowly cordate, lower surface lacking appendages, glands dense and evenly spread over the lower surface, volcano-like, circular, less usually shortly el-liptic, 0.15-0.2 mm diam., smallest towards the edge of the lid; spur erect, stout, c. 4 mm long, undivided. Upper pitchers cylindrical to funnel-shaped, 15.5 cm tall, c. 4 cm diam. in the lower half, gradually widening to c. 6 cm wide at the mouth, lacking wings, mouth circular, slightly oblique, column c. 3 cm high, peristome with ribs 0.5 mm high, c. 1 mm apart, outer edge of the peristome appressed to the pitcher wall, inner edge as the lower pitcher, but c. 1.5 cm long, teeth 3 mm long; lid ovate, 4.5 by 3 cm, apex rounded, base cordate; spur dorsiventrally flattened, 6.5 by 1.5 mm, divided into two acute parts for half its length. Inflorescences with unpleasant smell. Male inflorescence 61 cm long, 3 cm at widest point; peduncle 53 cm long, 5 mm wide at base; partial peduncles c. 35, evenly spaced, 2-flowered, lacking bracts, 5-7 mm long; pedicels 10-13 mm long; tepals elliptic, 4 by 1.75 mm; androphore 2.5-3 mm, anther head 1 by 1.1-1.25 mm. Fruit and seed unknown. Indumentum of red sessile glands densely and evenly spread on stem, upper and lower leaf surfaces and pitchers; youngest parts of stem, lower midrib, tendril, upper surface of the lid of the upper pitchers and the peduncle densely pubescent with numerous caducous, unequally 2-4-armed, pale reddish brown hairs, the arms ascending or decumbent, longest arms up to 1.5 mm long; pitchers with densely scattered simple stout red multicellular hairs, 0.2-0.4 mm long; partial peduncles, pedicels, the central area of the abaxial tepals, the carpels and androphore, more or less completely concealed by appressed coppery hairs 0.4 mm long. Colour of pitchers maroon, lightly speckled with darker purple or green, speckled dark red. Peristome purple, lid purple on greenish background. Flowers opening green, turning dark red.
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