Difficulty of distinguishing varieties and species. Did HCW suggest a printed list that might help?
Polymorphic genera.
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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.
Difficulty of distinguishing varieties and species. Did HCW suggest a printed list that might help?
Polymorphic genera.
Thanks HCW for Lythrum specimens.
CD has at last finished his Lythrum paper. ["Three forms of Lythrum", Collected papers 2: 106–31.]
Discusses the possibility of "convergence" occurring; believes it could be only very limited.