Nepenthes eustachya is a tropical pitcher plant endemic to Sumatra, where it grows from sea level to an elevation of 1,600 m. The specific epithet eustachya, formed from the Greek words eu and stachys
Nepenthes sumatrana is a tropical pitcher plant endemic to the Indonesian island of Sumatra, after which it is named.
Seedling growing on cliff face
Much taxonomic confusion still surrounds N. sumatrana. These upper pitchers were produced by plants that resemble N. sumatrana, but are atypical of the species.