Archive image from page 8 of Cytological studies of five interspecific. Cytological studies of five interspecific hybrids of Crepis leontodontoides cytologicalstudi65aver Year: 1930 1930] Avery: Hybrids of Crepis leontodontoides 141 somes to the two poles were seen, with occasional laggards which sometimes divide. It seems probable, however, that here, as in some of the other hybrids, all nine chromosomes occasionally divide in the first division, giving rise to dyads and diploid gametes. At the tetrad stage about 7 per cent dyads are present, the proportion varying from to per cent.

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