"Nepenthes ovata" × "N. spectabilis" is known to occur along the summit trail of Mount Pangulubao. This hybrid produces pitchers roughly intermediate in appearance between its parent species. The peristome is flattened and expanded, but to a lesser degree than in "N. ovata". The speckles of "N. spectabilis" are present, but the pitchers have a much lighter colouration. Most examples of this hybrid grow terrestrially and some climb into the forest canopy. "N. ovata" × "N. rhombicaulis" has also been recorded from the mountain.