Gronemeyer returned to the site with Andreas Wistuba between February 13 and 14, 2010. Numerous seedlings and mature, climbing plants of N. hamiguitanensis were observed, but no intermediate plants with lower pitchers were found. These field studies on Mount Hamiguitan also included observations of N. micramphora, N. justinae (then regarded as a form of N. mindanaoensis), and N. peltata.