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Darwin Correspondence Project

To A. W. Rimpau   13 December [1877]1

Dec. 13th.

Dear Sir

I am particularly obliged for your letter about the Beet & for your paper on the self-sterility of Secale, because I am purposing a sd. Edition of my Forms of Flowers & have quoted your statement, but I can easily strike out about the Beet, & give the additional reference about the Rye.—2 I hope that you will continue your valuable researches. The hybrids ore mongrels from the varieties of Triticum behave, apperently, quite like those from any two forms which are not highly variable.3

I remain, Dear Sir | Yours faithfully | Ch. Darwin.


The year is established by the relationship between this letter and the letter from A. W. Rimpau, 10 December 1877.
See letter from A. W. Rimpau, 10 December 1877 and n. 1. CD mistakenly refers to Forms of flowers; he added Rimpau’s observations to Cross and self fertilisation 2d ed., p. 370 n.
Triticum is the genus of wheat; in his letter of 10 December 1877, Rimpau had discussed some of the results of his experiments crossing different species and varieties of wheat, noting the great number of intermediate forms in the second generation.


Cross and self fertilisation 2d ed.: The effects of cross and self fertilisation in the vegetable kingdom. By Charles Darwin. 2d edition. London: John Murray. 1878.

Forms of flowers: The different forms of flowers on plants of the same species. By Charles Darwin. London: John Murray. 1877.


Thanks for letter about beet. Will strike out statement about it in MS of new edition of Forms of flowers.

Letter details

Letter no.
Charles Robert Darwin
Arnold Dietrich Wilhelm (Wilhelm) Rimpau
Sent from
Source of text
DAR 147: 304v
Physical description

Please cite as

Darwin Correspondence Project, “Letter no. 11284,” accessed on 16 September 2021,