The hip of the pitcher cup, which is found just below the peristome in N. villosa and in the lower quarter of N. edwardsiana pitchers, is located around the middle of N. × harryana pitchers. However, N. villosa plants from Mount Tambuyukon are easier to confuse with this hybrid, as they produce pitchers that may be elongated slightly above the hip.
The location of the pitcher cup's hip in N. villosa and N. edwardsiana is similar to that in N. × harryana, but it can vary based on plant species from Mount Tambuyukon, which might have pitchers slightly elongated above the hip.