Nepenthes jamban ( , not * ) is a tropical pitcher plant endemic to northern Sumatra. The specific epithet jamban is the Indonesian word for "toilet" and refers to the shape of the pitchers. Botanical history Nepenthes jamban was discovered during a series of field trips to Sumatra between 2004 and 2005. The species was first collected on April 22, 2005, south of Padang Sidempuan in the Indonesian province of North Sumatra. The formal description of N. jamban was published in 2006 in the botanical journal Blumea. The herbarium specimen Lee, Hernawati, Akhriadi NP 433 was designated as the holotype. It is deposited at the Herbarium of Andalas University (ANDA). Description Nepenthes jamban is a climbing plant. The stem, which is usually less than 5 mm thick, grows to 4 m in length and is cylindrical-angular in cross section. Internodes are up to 5 cm long. Leaves are sessile and coriaceous in texture. The lamina may be narrowly obovate to elliptic or slightly spathulate, and grows to 11 cm in length and 3.3 cm in width. One or two longitudinal veins are present on either side of the midrib together with numerous pinnate veins. Tendrils are up to 24 cm long. Rosette and lower pitchers are cylindrical to narrowly infundibular in the lower third, becoming widely infundibular above. They are relatively small, rarely exceeding 5.8 cm in height and 4.4 cm in width. Fringed wings (≤2 mm wide) are usually present in terrestrial pitchers. The pitcher mouth is almost horizontal. The inner surface of the pitchers is glandular throughout. The flattened peristome may be up to 8 mm wide and is lined with a series of teeth (≤0.5 mm long) on its inner margin. The lid or operculum is narrowly obovate, and up to 3.8 cm long and 1.3 cm wide. The undersurface of the lid bears scattered small red glands that are concentrated around the midrib. Around 20 to 30 very large crater-like glands (≤0.5 mm wide) are present in the apical quarter. These glands are so large that they are visible as swellings on the upper surface of the lid. The spur (≤4 mm long) is inserted at the base of the lid. It is generally unbranched but may be forked. Upper pitchers are circular in cross section and widely infundibular in their upper half. They are much larger than lower pitchers, reaching 12 cm in height and