Nepenthes hirsuta

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Nepenthes hirsuta

Description

Terrestrial climber 1-4 m tall. Leaves coriaceous, subsessile; Fruits with valves 35-42 by 3.5-4 mm. Seeds filiform, 25 by 0.25 mm.

Distribution

Asia-Tropical: Borneo present (Brunei present, Kalimantan present, Sabah present, Sarawak present)
Borneo: Sarawak, Brunei, Sabah, and Kalimantan.

Ecology

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Taxonomy

1 Nepenthes hirsuta, on account of the shape of its pitchers and its conspicuous dark, pilose indumentum is likely to be mistaken for one of the Regiae (the N. maxima group of species). It can be distinguished by the subsessile, not strongly petiolate leaves and the lower surface of the lid, which lacks an appendage. Nepenthes hirsuta varies from long-hairy to short-hairy and densely to weakly hirsute, but some hairs are always present though they are brittle and easily removed by abrasion. Hairs are never found on the upper surface of herbarium specimens, for example. Nepenthes leptochila is a weakly hairy variant, but not glabrous as has been thought. Inspection of young shoots on the type number of N. leptochila at BO shows hair bases and a few remnant hairs on the stems. 2. Nepenthes hirsuta is widespread and common in northern Borneo, but its three seemingly close relatives have more restricted distributions. Nepenthes macrovulgaris is apparently confined to ultramafic soils in Sabah, N. hispida occurs on sandstone in Sarawak, near the border with Brunei and Sabah and N. philippinensis grows on ultramafic soils in Palawan. See key to the N. hirsuta group under N. philippinensis.

Citation

Hook.f. 1996: Pitcher Plants of Borneo: 92: f. 50
Jebb & Cheek 1997 – In: Blumea: 47
Danser 1928: p. 306. – In: Bull. Jard. Bot. Buitenzorg: f. 8
Phillipps & A.L. Lamb 1988 – In: Nature Malaysiana: 16
Clarke 1997: Nepenthes of Borneo: 93: f. 61-62
Phillipps & A.L. Lamb 1996: Pitcher Plants of Borneo: 97: f. 52