ボゴール植物園
The holotype of "N. glabrata", "J.R.Turnbull &amp; A.T.Middleton 83113a", was collected on August 31, 1983, from the Tri Tunggal Eboni Corp. logging concession () in Central Sulawesi at an altitude of 1666 m. In their description of the species, Turnbull and Middleton wrote that the specimen was deposited at Herbarium Bogoriense (BO), the herbarium of the Bogor Botanical Gardens, but Matthew Jebb and Martin Cheek were unable to locate it in 1995 and 1996, and write that it "may never have been distributed".