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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.
Ovules of males of two forms [of Rhamnus catharticus?] are abortive and both females have incomplete stamens.
Sends some specimens of three kinds of buckthorn.
Thinks Rhamnus is a case of a dimorphic plant that has become dioecious.
"It [Rhamnus catharticus?] is certainly a case of dimorphic become dioecious."
Sends flowers of the differing kinds [of Rhamnus?] with observations.
He has had a great struggle with Buckthorn, and would like CD to see the measurements some time.