Which genus of tropical pitcher plants is often called monkey cups?

Which genus of tropical pitcher plants is often called monkey cups? Nepenthes is the genus commonly known by that name.

Nepenthes is a genus of carnivorous tropical pitcher plants in the monotypic family Nepenthaceae. Its modified leaves form fluid-filled pitchers that lure prey with scent, color, and nectar. Slippery inner walls and downward-pointing structures make escape difficult, while digestive fluids break down captured animals.

The nickname “monkey cups” comes from the old belief that monkeys drink rainwater from the pitchers. The name is not a separate taxonomic group, and it should not be confused with New World pitcher plants such as Sarracenia or Darlingtonia. Those plants also make pitchers but belong to Sarraceniaceae.

Nepenthes is concentrated in the Old World tropics, especially Borneo, Sumatra, and the Philippines. Species range from lowland plants in hot, humid forests to montane and tropical-alpine species exposed to cool nights. Carl Linnaeus formally published the genus name in 1753, drawing it from the Greek “nepenthes,” a mythical potion said to remove sorrow. About 170 species are currently recognised, alongside many hybrids and cultivars.