| D. plantaginea | Natural Hybrid | D. scabra |
Small numbers of this combination are to be expected in areas of sympatry of the parental species. Eleven individuals of this hybrid configuration had a mean pollen stainability of 34% and exhibited a maximum chromosome pairing configuration of 10II + 2M4 during meiosis. Formal names applied to this hybrid combination include Railliardia lonchophylla Sherff, xDubautia fucosa Sherff, xDubuatia fallax Sherff, and Railliardia kohalae Skottsb.