Has studied the Comparettia falcata, not mentioned in Orchids, and found it is often self-fertilising.
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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 studied the Comparettia falcata, not mentioned in Orchids, and found it is often self-fertilising.
Writes of his observations on the "valves of Houston" in the rectum, which he believes to be rudimentary organs.
Thanks his correspondent for his letter; hopes he will convey to the president how obliged he is for the invitation, which he cannot accept as it would tire him too much.