Has not studied Geum, but suppression of one sex is not rare in plants.
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The Charles Darwin Collection
The Darwin Correspondence Project is publishing letters written by and to the naturalist Charles Darwin (1809–1882). Complete transcripts of letters are being made available through the Project’s website (www.darwinproject.ac.uk) after publication in the ongoing print edition of The Correspondence of Charles Darwin (Cambridge University Press 1985–). Metadata and summaries of all known letters (c. 15,000) appear in Ɛpsilon, and the full texts of available letters can also be searched, with links to the full texts.
Has not studied Geum, but suppression of one sex is not rare in plants.
Gives a referee’s report on Samuel Haughton’s paper ["Notes on physical geology, no. IV", read 4 Apr 1878; published as "Physical geology", Nature 18 (1878): 266–8]. Believes his estimate of geological time is extremely wild. The conclusion that the interval of time separating the Miocene from the present is greater than that between the commencement of the Secondary period and the Miocene "seems almost monstrous". Recommends the paper not be published in the Proceedings.