“…Stebbins (1958) Contrary to the early reports of Karpechenko (1925) and Lamprecht (1941), there is now cytological evidence indicating that meiosis in P. vulgaris X coccineus hybrids does not follow a completely normal course. One pair of univalents is occasionally seen at metaphase I in the parental species, as well as in the hybrid, and a maximum of three pairs of univalents has been reported in F^hybrids (Marechal, 1971;Cheng, 1979). Also, the average number of chiasmata per bivalent is somewhat reduced, compared with the parental species.…”