Nepenthes dubia Isotype: Sumatra, Mt Talamaku (Ophir), 1900 m, ., 29 May 1917, Bünnemeijer 938 (BO) Lectotype: Sumatra, Mt Talamaku (Ophir), 1900 m, ., 29 May 1917, Bünnemeijer 938 (BO) Holotype: 24 Aug. 1957., Meijer 6949 (L)