Nepenthes treubiana
Description
Terrestrial climber 6-9 m tall.
Leaves chartaceous, petiolate, those of climbing stems lanceolate, elliptic or oblong, 30-39 by 7-12 cm;
Fruit with stipe 2-3 mm long;
Seed fusiform, 7-9 mm long.
Distribution
Misool Islands present, Sorong present, W New Guinea present
W New Guinea: Sorong, Misool Islands
Morphology
Nepenthes treubiana is unlikely to be confused with any other lowland species of Nepenthes in the island of New Guinea (N. ampullaria, N. insignis, N. mirabilis, N. neoguineensis, and N. papuana). None of these species has the combination of markedly petiolate, large leaf blades (30-39 by 7-12 cm) conspicuously stellate hairy below and strongly infundibuliform upper pitchers. Nepenthes treubiana is similar to and was formerly united with N. sumatrana from Sumatra. Nepenthes treubiana differs by having teeth on the inner margin of the peristome (vs. peristome entire), the densely hairy leaf margin, and relatively uniform lid glands, 0.2-0.4 mm diam. (vs. 0.2-0.7 mm diam. in N. sumatrana), evenly spread throughout the lid surface or absent from the centre (vs. largest along the midline and smaller elsewhere). Nepenthes treubiana is also similar to N. rafflesiana of Borneo, Sumatra and Peninsular Malaysia, but differs in lacking the characteristic long white arachnoid hairs of that species.