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To Asa Gray   4 December 1876

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.

Author:  Charles Robert Darwin
Addressee:  Asa Gray
Date:  4 Dec 1876
Classmark:  Archives of the Gray Herbarium of Harvard University (115)
Letter no:  DCP-LETT-10697

To Asa Gray   20 December 1876

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].

Author:  Charles Robert Darwin
Addressee:  Asa Gray
Date:  20 Dec 1876
Classmark:  Archives of the Gray Herbarium of Harvard University (116)
Letter no:  DCP-LETT-10728
Document type
letter (2)
Author
Addressee
Gray, Asa[X]
Correspondent
Date
1876
12
04 (1)
20 (1)
letter