Pictures of young plants illustrating the interesting juvenile pitchers and the gradual transformation from juvenile via intermediate to adult funnel shaped pitchers.
Nepenthes inermis (Gunung Gadut) Lower pitcher of cultivated plant.
Just for comparison, a seedling pitcher of the related Nepenthes dubia. Note, that both species have lower pichers that are compressed laterally.
Nepenthes dubia Seedling pitcher. Note the peristome and the laterally compressed pitcher, resembling the pitchers of young N. inermis plants a little.