Nepenthes, Sp. Pl. 1: 955. 1753 sec. Kubitzki (2003e)
- Type: Nepenthes distillatoria
Some attempts have been made to develop an infrageneric classification of Nepenthes, e.g. Danser (1928) recognized six informal groups based on morphology and distribution: Vulgatae, Montanae, Nobiles, Regiae, Insignes and Urceolatae. However. molecular phylogenetic studies (Meimberg & al. 2001, Meimberg & Heubl 2006) showed that these groups are not natural.