Terrestrial shrub or low climber. Stem usually winged, sometimes terete. Leaves sessile; lamina linear or narrowly oblong to oblanceolate, 20–60 x 3.5–7 cm, base attenuate, clasping the stem and only slightly decurrent; longitudinal nerves to 6–7 on each side of the midrib. Lower pitchers 30–35 x 14–16 cm, broadly ovoid or cylindrical with lower half swollen and expanded; wings up to 2.5 cm wide, with fringes to 1.8 cm long. Peristome dark red, loosely cylindrical, to 3 cm wide, lined with elongated ribs to 2 mm high; inner edge with needle-like teeth to 1.5 mm long; lid broadly ovate, 6–12 x 5–9 cm, without an appendage; apex rounded, base shallowly cordate; spur unbranched, 1.6 x 0.3 cm. Upper pitchers often smaller than upper pitchers; wings reduced to ridges. Pitchers usually light green, with sparsely scattered minute hairs.
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