Hybridization has been implicated between species of Caryota in the Philippines (Beccari 1919) and morphological evidence for hybridization was detected at several location from the island of Cebu in the Philippines show morphological intermediacy between the Philippine endermic C. cumingii and the widespread C. rumphiana,
two taxa otherwise well characterized on morphological geounds.
However, subsequent molecular analyses of plants from the same locality failed to demonstrate any evidence of hybridization, at least in terms of cpDNA variation.