Natural Hybrids
Left: A lower pitcher of N. izumiae × N. jacquelineaeRight: A putative natural hybrid involving N. izumiae
In the wild, N. izumiae is known to form natural hybrids with N. dubia and N. jacquelineae.
A single mature female plant of N. dubia × N. izumiae grows along the summit trail on Mount Talakmau. It produces infundibular upper pitchers that are yellowish-green in colouration. The pitchers are relatively small, reaching only around 10 cm in height. As in N. dubia, the stem and tendrils are purplish-red. The lamina is green with a red midrib. Nepenthes dubia × N. izumiae differs most obviously from N. dubia in having an ovate lid that is never reflexed beyond 180 degrees. This hybrid is listed as N. dubia × N. singalana in Charles Clarke's 2001 monograph, Nepenthes of Sumatra and Peninsular Malaysia, because at the time of its publication it was uncertain whether N. izumiae represented a distinct species.
Read more about this topic: Nepenthes Izumiae
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