Terrestrial climber, to 2.5 m tall. Stems obtusely triangular to quadrangular, 0.2-0.8 cm diam., internodes 1-9 cm long. Leaves thinly coriaceous, sessile, obovate to obovate-lanceolate or slightly spathulate, 3-15 by 1-3.2 cm, apex acute to rounded, base attenuate, clasping the stem for 3/4 of its circumference. Longitudinal nerves 2 or 3 on each side of the midrib in outer 1/2 of blade, innermost arising from base of midrib, fairly conspicuous. Pennate nerves numerous, oblique, ± curving towards margin. Lower pitchers ovoid, c. 10 by 3 cm, fringed wings 3 mm broad, fringe elements c. 5 mm long; mouth oblique, but horizontal in front part; peristome cylindrical at front, 3-5 mm broad, flattened towards lid, and to 18 mm broad, ribs 0.5-1 mm apart, less marked than in upper pitchers, outer edge strongly recurved, entire, inner edge with teeth 3 mm long, increasing to 7 mm long near the lid; lid orbicular, 3-3.5 cm diam., apex rounded, base cordate, lower surface lacking appendages, nectar glands dense over whole surface (rarely absent from the edge), orbicular (rarely transversely elliptic), shallow, pit-like, 0.15-0.4 mm diam., much larger and longitudinally elliptic along the midline, to 1-1.5 mm long; spur simple, ± flattened, to 7 mm long. Upper pitchers broadly to narrowly infundibuliform, somewhat contracted at mouth, 9-23 by 3-4.5 cm, lacking fringed wings; mouth horizontal at front, with peristome rising more or less to the vertical towards lid; peristome cylindrical, 2-4 mm diam. at front, to 11 mm broad near lid, ribs 1-2 mm apart, outer edge entire, inner edge with teeth 3 mm long, otherwise as lower pitcher; lid orbicular to 5.5 cm diam., lower surface lacking appendages, nectar glands dense, largest, c. 1 mm diam., near base of lid. Male inflorescence to 20 cm long, 1.5 cm wide; peduncle 7 cm long, 1 mm diam. at base; partial peduncles 10-20, 1-flowered, rarely 2-flowered, 3-5(-7) mm long; bract 3-4 mm long, inserted at or near base; tepals elliptic, c. 5.5 by 3 mm; androphore c. 3 mm long; anther head c. 1.75 by 3 mm. Fruit valves 15-20 by 5 mm. Seeds fusiform, c. 8 mm long. Indumentum dense on inflorescence, new growth and tendrils, sparse elsewhere. Colour of pitchers pale green, peristome streaked with red; midrib red; indumentum reddish brown.
Home