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.

Nepenthes berbulu (Nepenthaceae), a pitcher plant from Peninsular Malaysia with remarkably long lid bristles

“…This genus of at least 160 accepted species is primarily distributed across the Malesian and Papuasian biogeographic regions, with centres of diversity in Sumatra, Borneo, and the Philippines (Danser 1928;Jebb & Cheek 1997;Clarke et al 2018). In the last 20 years, the genus has received significant attention from botanists and enthusiasts alike, resulting in a series of significant discoveries that have led to the description of many taxa at species rank, as well as emended circumscriptions of existing species concepts (Akhriadi et al 2004;Clarke et al 2006;Mey et al 2011;Cheek & Jebb 2013;Robinson et al 2019;Bianchi et al 2020;Golos et al 2020).…”

First record of functional underground traps in a pitcher plant: Nepenthes pudica (Nepenthaceae), a new species from North Kalimantan, Borneo

“…The Nepenthes flora of Kalimantan is poorly known compared to that of Malaysian and Bruneian Borneo, with relatively few modern records. Thus, the new discoveries that have emerged recently after expeditions to certain remote areas of Kalimantan ( Robinson et al 2019 ; Golos et al 2020 ) are not surprising.…”

A New Species of Nepenthes (Nepenthaceae) and Its Natural Hybrids From Aceh, Sumatra, Indonesia

“…The genus consists of 168 accepted species (POWO, 2021) and the number is increasing as almost every year, several new taxa have been described. For example, Robinson et al (2019) Sumatra island is the second largest diversity centre of Nepenthes species number recorded, compared with the next richest island: Borneo. Several Nepenthes experts have claimed that Sumatra is a hotspot of Nepenthes evolution and the number of endemic species from Sumatra is higher than Borneo (Wistuba et al, 2007).…”