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DCP-LETT-5509

From:
Charles Robert Darwin
To:
Johann Friedrich Theodor (Fritz) Müller
Date:
22 Apr [1867]
Source of text:
The British Library (Loan MS 10 no 15)
Summary:

Self-sterility in orchids.

Growth differences in plants raised from self- and cross-fertilised seed.

Contributor:
Darwin Correspondence Project

DCP-LETT-5517

From:
Charles Robert Darwin
To:
Alfred Russel Wallace
Date:
29 Apr [1867]
Source of text:
The British Library (Add 46434, f. 84)
Summary:

Comments on ARW’s view of colouring in relation to sexual selection and protection. It is not new to CD. Hopes to discuss subject fully in his "Essay on Man" [Descent]. As to the problem of brightly coloured females, CD is not satisfied that it is due to males taking over incubation. Admires "value and beauty" of ARW’s generalisations.

Contributor:
Darwin Correspondence Project
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