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Denny, John in addressee 
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From:
Charles Robert Darwin
To:
John Denny
Date:
9 July 1872
Source of text:
University of Otago Library, Special Collections (DeB MS 55)
Summary:

Has read JD’s articles in the Gardeners’ Chronicle [(1872): 872, 904–5].

Questions him on the fertility of certain varieties of Pelargonium which are fertile with some varieties but infertile with others.

Contributor:
Darwin Correspondence Project
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From:
Charles Robert Darwin
To:
John Denny
Date:
14 July [1872]
Source of text:
DAR 96: 114–15
Summary:

Discusses JD’s crossing experiments with Pelargonium; notes that his conclusions on male prepotence oppose those of Gärtner. Suggests that his observations on differences in fertility of certain varieties of Pelargonium crossed with certain other varieties be communicated to the Linnean Society.

Contributor:
Darwin Correspondence Project
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From:
Charles Robert Darwin
To:
John Denny
Date:
22 July 1872
Source of text:
University of Otago Library, Special Collections (DeB MS 55)
Summary:

Discusses the mutual sterility of some varieties of Pelargonium.

Contributor:
Darwin Correspondence Project