Nepenthes albomarginata

Nepenthes albomarginata is a climbing plant. The stem may reach lengths of up to 4 metres (13 ft) and is up to 5 millimetres (0.20 in) in diameter. Internodes are cylindrical in cross section and up to 15 centimetres (5.9 in) long.

Leaves are coriaceous in texture. The lamina or leaf blade is lanceolate in shape and up to 25 centimetres (9.8 in) long by 2 centimetres (0.79 in) wide. It has an acute apex and its base is gradually attenuate and amplexicaul. The leaves of this species are characteristic in that they completely lack a petiole. Longitudinal veins are indistinct. Tendrils are up to 20 centimetres (7.9 in) long. Rosette and lower pitchers are bulbous in the basal third and cylindrical above. They are relatively small, reaching only 15 centimetres (5.9 in) in height by 4 centimetres (1.6 in) in width. A pair of fringed wings up to 5 millimetres (0.20 in) wide runs down the front of each pitcher. The pitcher mouth is round and rises to form a short neck at the rear. The peristome is cylindrical in cross section, up to 2 millimetres (0.079 in) wide, and bears indistinct teeth. The inner portion of the peristome accounts for around 34% of its total cross-sectional surface length. A dense band of short white trichomes is present directly below the peristome, although these may be missing from pitchers that have caught termites. …

Nepenthes albomarginata is a widespread species, occurring in Borneo, Peninsular Malaysia, and Sumatra. It is also found on smaller islands such as Nias and Penang. It has an altitudinal distribution of 0–1200 m above sea level.

Its typical habitat consists of kerangas forest, but it has also been recorded from the summit vegetation of lowland peaks. It is known from peat and limestone substrates.

Nepenthes albomarginata was first collected by Thomas Lobb in 1848. It was formally described a year later by John Lindley in The Gardeners' Chronicle. The species was introduced into cultivation in the United Kingdom in 1856. In the 1996 book Pitcher-Plants of Borneo, N. albomarginata is given the vernacular name white-collared pitcher-plant. This name, along with all others, was dropped from the much-expanded second edition, published in 2008.