resolved. The most recent taxonomic revision by Charles Clarke, Nepenthes of Sumatra and Peninsular Malaysia (2001), elevated N. longifolia to species status once again. Description Nepenthes longifolia is a strong climber; the stem often grows to 10 m and can attain a length of up to 12 m. It is up to 9 mm in diameter. Internodes are sub-cylindrical in cross section and up to 12 cm long. Leaves are coriaceous in texture. The lamina is lanceolate to lanceolate-spathulate or lanceolate-obovate in shape and up to 55 cm long and 9 cm wide. It has an emarginate apex. The lamina is gradually attenuate into a short petiole (≤7 cm). The petiole is decurrent into a pair of wings (≤2 mm wide) that extend over almost the whole length of the internode. Three to eight longitudinal veins are present on either side of the midrib. Pinnate veins are numerous but indistinct. Tendrils are usually shorter or as long as the lamina, although they may be as long as 110 cm. Rosette and lower pitchers are infrequently produced and are borne on very long tendrils. They are ventricose or narrowly ovoid in the lower part and cylindrical above. They grow up to 20 cm high and 5 cm wide. A pair of fringed wings (≤5 mm wide) runs down the front of the pitcher. The fringe elements are up 6 mm long and are spaced 1 to 3 mm apart. The pitcher mouth has an oblique insertion and is acuminate towards the lid. The peristome is flattened, up to 6 mm wide, and has a distinct raised section at the front, often with one or two notches. It is broadly cylindrical in cross section and bears a series of ribs spaced 0.2 mm apart. The glandular region covers the ventricose portion of the inner surface. Overarched glands are present at a concentration of around 500 per square centimetre. The pitcher lid or operculum is orbicular or ovate, up to 3 cm in diameter, and lacks appendages. A number of large round to ovate glands are concentrated near the midrib on the lower surface of the lid. An unbranched spur (≤15 mm long) is inserted near the base of the lid. Upper pitchers arise gradually from the end of the tendril, forming a curve up to 4 cm wide. They are narrowly infundibular in the lowermost parts, slightly ovoid up to the hip,