Nepenthes macrovulgaris (/nɪˈpɛnθiːz ˌmækroʊvʌlˈɡɛərɪs/; from Greek macro- "large" and Latin vulgaris "common, usual"), or the serpentine pitcher-plant,[4] is a tropical pitcher plant endemic to Borneo.

[5][6][7] Before modern molecular phylogenies, it was thought that Nepenthes macrovulgaris is most closely related to N. hirsuta and N. hispida, and may have been difficult to distinguish from them.

Botanists Matthew Jebb and Martin Cheek suggest that N. macrovulgaris is also related to N. philippinensis, a species endemic to Palawan in the Philippines.

[10] The striking similarity in morphology and habitat preference between N. macrovulgaris and Nepenthes philippinensis could be because they represent an ancestral phenotype, or parallel/convergent evolution.

Turnbull and Middleton, who described the species in 1988, explain that they chose the specific epithet macrovulgaris to:[4] [...] indicate a relatively large plant and to indicate that no single characteristic uniquely distinguishes this taxon from all others.