Search: Darwin, C. R. in author 
1860-1869::1867::04::15 in date 
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From:
Charles Robert Darwin
To:
Asa Gray
Date:
15 Apr [1867]
Source of text:
Gray Herbarium of Harvard University (97)
Summary:

Thanks AG for his trouble about expression queries; wishes he had thought earlier of having them printed.

Is "plodding on" correcting Variation

and getting "a little amusement" from plant experiments. Oxalis is trimorphic like Lythrum.

Is continuing his experiments on seedling vigour.

Has heard hybrid potatoes can be produced by joining halves of different tubers.

Contributor:
Darwin Correspondence Project
From:
Charles Robert Darwin
To:
Joseph Dalton Hooker
Date:
15 [Apr 1867]
Source of text:
DAR 94: 21–2
Summary:

Agrees with JDH about Anderson-Henry. He has however described in detail a curious case of the ovaria of Rhododendron directly affected by foreign pollen, like the Chamaerops and date-palm case.

Contributor:
Darwin Correspondence Project