PROMISCUOUS HYBRIDS. “When pollinated by facultative apomictic tetraploids, the offspring generated were frequently fertile and highly sexual tetraploid hybrids. This was observed in a fixed setting, but is evidently occurring in nature due to the extensive variability within tetraploid populations that are associated with diploid colonies.”
http://libres.uncg.edu/ir/asu/f/Mueller,%20Marissa%20Thesis.pdf