From:
Charles Robert Darwin
To:
Asa Gray
Date:
10 Sept [1866]
Source of text:
Gray Herbarium of Harvard University (92)
Summary:
L. Agassiz’s evidence [for glaciation of America] is very weak.
Thanks AG for arranging for American edition of Variation, but doubts that the book will be successful.
Has found no differences in pollen of Rhamnus so cannot conjecture whether it is dimorphic.
The common oxlip of England is certainly a hybrid between the primrose and the cowslip whereas Primula elatior is a good species.
Reports experiments on the relative vigour of seedlings from cross- and self-fertilised plants.
Contributor:
Darwin Correspondence Project