Nepenthes inermis is a tropical pitcher plant endemic to the Indonesian island of Sumatra. The specific epithet inermis is Latin for "unarmed" and refers to the upper pitchers of this species, which are unique in that they completely lack a peristome.
Upper pitchers of N. inermis from Mount Belirang
Closeup of the pitcher mouth of N. inermis. The upper pitchers of this species are the only ones in the genus to completely lack a peristome.
An upper pitcher of N. × pyriformis
Nepenthes dubia is a tropical pitcher plant endemic to the Indonesian island of Sumatra, where it grows at an altitude of 1600–2700 m above sea level. The specific epithet dubia is the Latin word for "doubtful".
A young climbing plant in mossy forest at around 1600 m
Numerous plants growing among stunted ridgetop vegetation