Finally, Opperhout 27/11/1929 was taken on that date from the summit of Dolok Sempenan at 1600 m. It consists of a rosette and a lower pitcher with its lid missing. Despite this, it can be identified as belonging to N. ovata based on the structure of the peristome. All three specimens are deposited at the Bogor Botanical Gardens (formerly the Herbarium of the Buitenzorg Botanic Gardens) in Java. Two further specimens of N. ovata, Nepenthes Team (Hernawati, P. Akhriadi & I. Petra) NP 373 and 377, were collected on December 16, 2003, as part of a conservation expedition focusing on Nepenthes. They were taken from Mount Pangulubao at an altitude of between 1500 and 2100 m. Both are deposited at the herbarium of Andalas University in Padang, West Sumatra. Description Nepenthes ovata is a climbing plant. The stem grows to 5 m in length and 6 mm in diameter. Internodes are cylindrical and up to 15 cm long. Leaves are coriaceous in texture and sessile to broadly sub-petiolate. The lamina is lanceolate-spathulate and reaches 12 cm in length and 4 cm in width. It usually has an acute apex and is gradually attenuate towards the base. Three longitudinal veins, which originate near the base of the lamina, are present on either side of the midrib. Pinnate veins are indistinct. Tendrils may be up to 18 cm long. Their insertion at the end of the lamina is apical. Rosette and lower pitchers are either infundibular in the lower third to half and ovoid above, or ovoid throughout. They reach 25 cm in height and 9 cm in width. A pair of fringed wings (≤15 mm wide) runs down the front of the pitcher. The glandular region covers the lower third to half of the inner surface. The glands are overarched and occur at a density of 400 to 1300 per square centimetre. The pitcher mouth is round and elongated into a wide neck. The peristome is flattened, expanded, and up to 40 mm wide. A series of teeth (≤7 mm wide) line its inner margin. The peristome ribs are spaced 0.5 to 1.5 mm apart. Pitchers bear 14 to 18 longitudinal nerves across their height. The pitcher lid is ovate and usually has a hook-shaped appendage on the underside near the peristome. A branched spur (≤5 mm long) is inserted near the base of the lid. Upper pitchers arise abruptly from