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1870-1879::1876::12 in date 
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DCP-LETT-10697

From:
Charles Robert Darwin
To:
Asa Gray
Date:
4 Dec 1876
Source of text:
Archives of the Gray Herbarium of Harvard University (115)
Summary:

Plans to republish his paper on dimorphism with additions [Forms of flowers]. Is convinced it is necessary to compare pollen-grains and the state of the stigma to recognise dimorphic plants. Requests specific plants to test for dimorphism and would welcome examples from any family in which he has not encountered dimorphic species.

Contributor:
Darwin Correspondence Project

DCP-LETT-10728

From:
Charles Robert Darwin
To:
Asa Gray
Date:
20 Dec 1876
Source of text:
Archives of the Gray Herbarium of Harvard University (116)
Summary:

Thanks for information about Hottonia.

Has found dimorphism in Forsythia.

Considers AG’s arguments on different terms for dimorphism, but cannot change to using the proposed new term [see 10699].

Contributor:
Darwin Correspondence Project
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