Terrestrial shrub or climber, 1-4 m tall. Stems 4-6-angular-rounded, 1-2.2 cm diam., with 4 wings, each c. 5 mm wide, decurrent from the leaf base above and abruptly uniting above the axil below, and on the same side of the stem; short shoots with internodes c. 1 cm long, wings forming a saddle-like shape; climbing shoots with internodes 7-8 cm long. Leaves coriaceous, sessile to weakly petiolate; leaves of short shoots long-elliptic to spathulate, 20-59 by 7-11 cm, apex acute with tendril peltate by several mm, base attenuate, forming an ill-defined, winged petiolar area 2-4.5 cm wide, clasping the stem for 1/2 its circumference, the wings decurrent, initially sheathing, then patent; leaves of climbing stems narrowly oblong-elliptic to ligulate, 37-60 by 4.4-6.5(-9) cm. Longitudinal nerves 3 (or 4) on each side of the midrib in the outer half, prominent above and below. Pennate nerves patent, straight, little branched, conspicuous above and below. Lower pitchers recumbent, ellipsoid, 14-36 by 5.8-12.5 cm, with two fringed wings 5-10 mm wide, the fimbriae 5-7 mm long, 2-4 mm apart; the mouth oblique, slightly concave, narrowly ovate; peristome flattened, with ribs 0.2-0.3(-0.5) mm high, 0.7-1 mm apart, 5 or 6 striae between each ridge, outer edge of peristome 12-40 mm broad, gradually widening towards the lid, dentate, folded into 12-16 shallow teeth 3-7 mm long, inner edge appressed to pitcher wall, 5-10 mm wide, the margin with falcate teeth 1 mm long; column absent; lid as large or larger than mouth, held at 45° elevation from mouth, narrowly elliptic, 5.5-15 by 3.2-5 cm, apex rounded, base cordate, lower surface lacking appendages, midrib raised, glands restricted to a thickened area about half the width of the lid and running nearly its length, absent from the midrib, circular or transversely elliptic, bordered, black, 0.2-0.3 mm diam.; spur c. 5 mm long, entire. Upper pitchers cylindrical-infundibulate, 20-36 by 6-8 cm, fringed wings running the length of the pitcher, 3-4 mm wide, fimbriae 3-7 mm long; peristome rounded, 2.5-4 cm wide in the widest part, ribs to 1 mm high; lid 7-9 by 3-4 cm. Male inflorescence c. 145 by c. 10 cm; peduncle 33 cm long, 7 mm diam. at base; partial peduncles 2-flowered, 7-22 mm long; bracts 2-3 mm long, absent in some inflorescences; pedicels 17-35 mm long; tepals ovate, 3.5-4 by 2.5-3 mm; androphore 1-3 mm long; anther head 1.5-2 by 2-3.5 mm. Infructescence c. 103 cm long; peduncle 46 cm long, 1 cm wide at base, with a pulvinus c. 1.5 cm wide; partial peduncles 4-5 cm long; pedicels 2.8-3.2 cm. Fruits with valves 25-28 by 3.5-4 mm. Seeds fili-form, 8 by 0.3 mm (probably immature). Indumentum of sessile red glands on lower surface of leaf blade and outer pitcher and lid intermixed, on the outer pitcher, with simple, patent red hairs 0.5 mm long; partial peduncles to lower surface of tepals and ovary fairly densely covered in coppery coloured, 1 or 2 branched appressed hairs 0.3 mm long. Colour of the pitcher yellow or pale green marbled red; peristome red often striped yellow and green; lid pale green suffused with olive.
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