This is a preview. Log in through your library . Abstract The role of polyploidy in gymnosperms has been evaluated. Polyploidy is found in the progeny of diploid species, in stray trees of otherwise ...
THIS important work was reviewed at length in the issue of NATURE for August 10, 1911 (vol. Ixxxvii., p. 171). The revised edition is in no sense rewritten, but important changes and additions occur, ...
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