Hi, I've owned this plant, which I presumed was a lowland nepenthes, for over a year and kept it on the windowsill after it outgrew its fishbowl terrarium. It wasn't pitchering (no kidding) on the sill, but did spout a couple basil shoots one day! Excited, I decided that it was stupid to keep this gorgeous plant in a humidity-lacking environment so i put it in with my highland plants and within two weeks it formed this 4" pitcher!!! The first pitcher since its fishbowl days and showing more mature characteristics. I tried having it ID-ed back then, but it was still too young to know.
Anyways, I still have no idea what kind of nepenthes it it, so if someone knows, please let me know! I bought it from an odd source: a funky furniature store in Sacramento, CA. All the woman selling it said was it was a nepenthes, she didn't know what kind.