Revisions in Nepenthes following explorations of the Kemul Massif and the surrounding region in north-central Kalimantan, Borneo

Abstract

An expedition to the highest peak of the Kemul Massif located a number of different Nepenthes taxa, including the type populations of N. fusca Danser and N. mollis Danser (Nepenthaceae), neither of which have been observed in situ since they were first collected from Kemul in 1925. Studies of the type form of N. fusca show that N. fusca s.lat. includes two other species, one largely restricted to Sabah’s Crocker range, here reinstated as N. zakriana (J.H.Adam & Wilcock) J.H.Adam & Hafiza, and a more southerly distributed species from Brunei, Sarawak and Kalimantan, named here as N. dactylifera A.S.Rob, Golos & Barer. Analysis of the type population of N. mollis indicates that N. hurrelliana Cheek & A.L.Lamb is a heterotypic synonym of N. mollis, and reveals an additional undescribed Nepenthes species from Sarawak and Kalimantan with a widespread but highly localised range.