Undulatifolia is a relatively recent discovery from central Sulawesi. This plant produces hairy pitchers and very wavy leaves. I have found that unlike the other Sulawesi species, Undulatifolia is quite tolerable of lower humidity conditions. It does appear to grow a lot faster in higher light levels (I have my largest male plant in the greenhouse where it's only 40% shaded). The first photo shows a mature pitcher from one of my male plants.
This plant is about 2.5” in diameter, potted in a 4" pot. Plant will be shipped unpotted, priority.