Phalaenopsis violacea (from Peninsular Malaysia) is very closely related to Phalaenopsis bellina (from Borneo) and have so far been accepted as separate species. Recently, there is another split in this species complex in the form of Phalaenopsis mentawaiensis (from Mentawai, West Sumatra) that exhibit very long racemes but with a flower form most similar to Phalaenopsis violacea. Because all three species used to be considered a single species (ie Phalaenopsis violacea), some line-bred "species" stocks are potentially intermixed hybrids.
Phalaenopsis violacea