The holotype of "N. murudensis", "Yii Puan Ching S 44623", was collected on September 13, 1982, between the first and second summits of Mount Murud. It is deposited at the Royal Botanic Gardens, Kew. Another specimen, "Beaman 11461", was collected by John H. Beaman between April 10 and April 17, 1995, from the summit ridge of Mount Murud at an elevation of between 2300 and 2400 m above sea level. This latter specimen was collected as part of the eighth botanical expedition to Mount Murud since Eric Mjöberg's first ascent in 1922.