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 pitcher cup's hip in N. villosa and N. edwardsiana is found just below the peristome, while it is located near the middle of N. × harryana pitchers. Nevertheless, N. villosa plants from Mount Tambuyukon are often misidentified as this hybrid because their pitchers may be slightly longer above the hip.