Terrestrial shrub to at least 20 cm tall, possibly climbing. Stem terete, strongly flexuose, 5 mm diam., internodes of climbing stems 2.5-4 cm long, axillary buds hemispherical, 1 by 1 mm, inserted about 1 mm above the axil. Leaves coriaceous, subsessile, lanceolate-obovate 13-26 by 2-5.5 cm, apex acute to rounded, peltate, base attenuate, parallel sided and somewhat dilated and amplexicaul at the very base, clasping the stem for c. 1/2 its circumference. Longitudinal nerves 4 or 5 on each side of the midrib, in outer 2/3-3/4 of blade, arising from base, or some from lower part of midrib. Pennate nerves arising obliquely, curving towards margin. Lower pitchers ellipsoid throughout, and narrowest at mouth, or somewhat tubular in upper 1/2; 12-22 by 3.5-8 cm, fringed wings 2-8 mm broad, with fringe elements c. 3 mm long, 2-4 mm apart; mouth oblique, elliptic, straight; peristome rounded at front, somewhat broadened near rear, 3-22 mm wide, ribs 0.6-0.7 mm apart, 0.3 mm high, outer edge undulate, inner with teeth to 1.5 mm long; lid ovate to narrowly ovate, 4.5-9.2 by 3-5 cm, apex rounded, base abruptly attenuate to scarcely cordate, lower surface lacking appendages, with a prominent central ridge 1-2 mm high, nectar glands dense near base and along midline, obscurely rimmed, pit-like, longitudinally elliptic, 0.3 mm long, remaining surface glandless apart from a few orbicular glands 0.1-0.2 mm diam. near the midline; spur flattened, c. 10 by 1 mm, apex rounded. Upper pitchers ellipsoid in lower 1/2, constricted above and widening to mouth; to 19 by 5 cm; mouth ovate; peristome 4 mm wide, rounded at front, expanded near lid to 12 mm wide, ribs 0.3-0.5 mm apart, outer edge sinuate, inner with teeth to 2 mm long; wings fringed as in lower pitcher, but near mouth only. (Upper pitchers of Kostermans 14017, BO specimen ellipsoid below, tubular in upper 1/2; to 12 by 2 cm; peristome 1-2 mm wide, rounded, not expanded; wings absent). Male inflorescence 15-20 by c. 2.5 cm; peduncle 7.5 cm long, 1.5-2 mm diam. at base; partial peduncles 1-flowered; bracts absent; pedicels 6-7 mm long; tepals elliptic, c. 3 by 2.25 mm; androphore 2.25 mm long; anther head 1 by 1.25 mm. Indumentum densely puberulent of simple, patent hairs 0.1-0.2 mm long, present on stems and upper leaf surfaces (hairs brownish white) and on inflorescence (hairs red) from base of peduncle to lower surface of tepals; androphore glabrous; lower surface of leaves with sessile red glands c. 0.1 mm diam. Colour: leaves drying a characteristic grey-green above, and reddish brown below. Live pitchers pale green to white with black-purple specks to dark purple with greenish purple spots; peristome brown; wings brown.
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