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Flow cytometry histogram: violet and dusky pink—the diploid maternal species H. undatus at the beginning and the end of the run, respectively; brown—a triploid hybrid (S-75); olive green and light green—two independent runs of the regenerated allopentaploid N-122; orange—the regenerated allohexaploid N-121; and blue—the paternal species, the tetraploid H. megalanthus.
