Botanical History
The species was mentioned as an undescribed taxon in Charles Clarke's 2001 monograph, Nepenthes of Sumatra and Peninsular Malaysia, under the name "Nepenthes species B". Clarke considered it to be most closely allied to N. singalana, writing that "urther research is required to determine whether or not this is simply an unusual variety of N. singalana, or whether it warrants description as a distinct species". Flowering size specimens of N. izumiae, labelled as N. singalana from Mount Talakmau, were already in cultivation before the species was formally published.
Nepenthes izumiae was formally described by Troy Davis, Charles Clarke and Rusjdi Tamin in a 2003 issue of the botanical journal Blumea. Clarke, Davis & Tamin 1309 was designated as the holotype. This specimen was collected in the Barisan Mountains, north of Bukittinggi, on July 13, 2000. It is deposited at the Herbarium Universitas Andalas (ANDA) of Andalas University in Padang, West Sumatra.
The next detailed treatment of N. izumiae appeared in Stewart McPherson's 2009 monograph, Pitcher Plants of the Old World.
Read more about this topic: Nepenthes Izumiae
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