Terrestrial climber to 4 m tall. Stems terete to 1 cm diam. Leaves thinly coriaceous, more or less sessile; those of climbing stems elliptic-spathulate to oblong, 15-27 by 3-6 cm, apex acute to acuminate, base cuneate or broadly winged, clasping the stem and decurrent for 1-3 cm. Longitudinal nerves 3 or 4 on each side of the midrib, scattered throughout lamina, innermost arising from midrib. Pennate nerves numerous, arising obtusely and forming a net-like pattern with the longitudinal nerves. (Leaves of ro-settes usually highly reduced, sometimes as small as 3 by 0.7 cm, triangular in outline, dilated at the base, and clasping the stem, sometimes forming a sheath, with penninervous venation only, only the largest ones with the beginning of longitudinal veins). Lower pitchers ellipsoid-urceolate, narrowing towards mouth, 6-16 by 2-6.5 cm, with 2 fringed wings 2-5 mm wide, fringe elements 2-4 mm long; mouth ovate, acute to acuminate towards lid, slightly concave, oblique; peristome rounded at front, expanded towards sides and narrowing towards lid, 2-12 mm wide, with prominent, papery, thin ribs 0.8-2 mm apart, 0.5-1.5 mm high, outer edge entire, inner with teeth 2-4 mm long; lid ovate 2-7.3 by 1.5-5.3 cm, apex rounded, base truncate to cordate, lower sur-face lacking appendages, nectar glands few, prominently lipped, 0.1-0.5 mm wide, near midline and towards base of lid only, absent from margin; spur filiform or flattened, rarely many branched, 1-4 mm long. Upper pitchers apparently only produced rarely, or (?) only in some populations (e.g. G. Malintang), somewhat ventricose in lower half, tubular above; 7-22 by 1.5-4.5 cm, with two fringed wings to 0.5 cm wide, fringe ele-ments to 0.6 cm long; peristome expanded towards lid, to 2.5 cm wide, outer edge entire, inner with teeth to 1 cm long; lid broadly ovate, lower surface lacking appendages, nectar glands numerous near midline, largest in centre of lid, to 0.8 mm wide. Male inflorescence similar to that of N. gymnamphora to 50 cm long; partial peduncles 2-flowered near base, 1-flowered above, with a filiform bract near base, rarely wholly 1-flowered, to 0.5 mm long; pedicels to 1.5 mm long; tepals to 5 by 2.5 mm; androphore to 5 mm long; anther head to 1.5 mm wide. Indumentum densely brown tomentose on young pitchers, hairs stellate, c. 0.1 mm wide; leaf margin often with dense brown indumentum on lower surface; inflorescence axis and pedicels densely pubescent. Colour of lower pitchers green, densely blotched with maroon.
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