I might be mistaken. It could have been another Nepenthes.
This plant had pitchers with maws six inches wide and they
must have been 8 inches or more high, maybe closer to a foot
high. It was big. Perhaps someone else has seen it and can
correctly identify if for the record. If so, I would like
to know what it is. I was very impressed...at least by the
pitcher size. This is the kind of Nepenthes that could eat
little birds, small lizards, tiny snakes, and small mammals.
---Steve