Pitcher Plants of the Old World
The first published description of "N. kerrii" appeared in volume I of Stewart McPherson's 2009 monograph, "Pitcher Plants of the Old World". It was included as an "incompletely diagnosed taxon" under the name "N." sp. Trang. McPherson wrote that it was known with certainty only from Thailand, but had also been reported from the Malaysian island of Langkawi. He considered it to be most closely related to "N. kampotiana", writing that "[m]ore extensive observations are required in order to determine whether this taxon merely represents variation within "N. kampotiana" or is a distinct species".