(1873), Eunepenthes Hook.f. (1873) and Mesonepenthes Harms (1936) (Latin: meso: middle; "middle" Nepenthes).
The Nepenthes species found in the subgenera Anourosperma and Mesonepenthes differ from those in the Vulgatae, where Danser had placed them. Harms placed the great majority of Nepenthes species in the Eunepenthes; Anourosperma was a monotypic subgenus, while Mesonepenthes contained only three species.