pitchers are the largest traps produced by the plant, growing to 24 cm in height by 16 cm in width. A pair of wings (≤2 cm wide) is present on the ventral surface of the pitcher cup; the fringe elements are up to 8 mm long. The rear of the pitcher is elongated into a pronounced neck. The waxy zone of the inner surface is reduced. The pitcher mouth is ovate and concave, and has an oblique insertion. The peristome is glossy and more-or-less cylindrical in cross section. It is up to 2 cm wide at the front, becoming expanded at the sides and rear, where it reaches a maximum width of over 5 cm. The outer margin of the peristome may be sinuate, whereas the inner margin is deeply incurved, especially towards the back of the pitcher. The inner portion of the peristome accounts for around 34% of its total cross-sectional surface length. The two lobes of the peristome are typically separated by a gap of several millimetres under the lid. The peristome ribs are well developed, being up to 2 mm high. The pitcher lid or operculum is ovate to triangular, growing to 5 cm in length by 3 cm in width. It has an acuminate apex and a truncate to auriculate base. The lid is noted for commonly exhibiting irregular, highly crenellated margins. Two prominent appendages are often found on the lid's lower surface. The first, a triangular basal crest, is up to 12 mm long. The second, a filiform or triangular apical appendage, is up to 18 mm long. Both the appendages and the lid's midline bear elliptic, bordered glands measuring up to 2 mm by 1 mm. The remainder of the lid's lower surface bears many smaller glands. An unbranched spur up to 10 mm long is inserted near the base of the lid. Upper pitchers are narrowly infundibular in the basal half to three-quarters, rapidly expanding to become broadly infundibular in the upper portion. They may be shortly contracted directly below the orifice. Upper pitchers are significantly smaller than their terrestrial counterparts, reaching only 15 cm in height by 8 cm in width. Characteristically, the hollow pitcher tube continues past the curved basal portion of the trap and for a few centimetres up the tendril. This is also commonly seen in N. flava, N. fusca, N. jamban, N. ovata, and N. vogelii. The wings