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From:
Charles Robert Darwin
To:
Johann Xaver Robert (Robert) Caspary
Date:
21 Feb [1866]
Source of text:
Yale University: Beinecke Rare Book and Manuscript Library (GEN MSS MISC Group 1559 F-2)
Summary:

Requests copy of paper read at Amsterdam Horticultural Congress, on graft-hybrids like that of Cytisus adami [see 5018].

Contributor:
Darwin Correspondence Project
From:
Johann Xaver Robert (Robert) Caspary
To:
Charles Robert Darwin
Date:
25 Feb 1866
Source of text:
DAR 161: 118
Summary:

Sends papers on graft-hybrids ["Sur les hybrides obtenus par la greffe", Bull. Congr. Int. Bot. & Hortic. Amsterdam (1865): 65–80, and "Über Mischlinge, durch Pfropfen entstanden", Sitzungsber. K. Phys.-oekon. Ges. Königsberg 6 (1865): 11–21].

Contributor:
Darwin Correspondence Project
From:
Charles Robert Darwin
To:
Johann Xaver Robert (Robert) Caspary
Date:
4 Mar 1866
Source of text:
DAR 92: A38–9
Summary:

Thanks RC for photograph and for papers, which are of highest interest to CD. He is not fully convinced about the rose by RC’s graft-hybrid paper [Bull. Congr. Int. Bot. & Hortic. Amsterdam (1865): 65–80]. Still retains faith in his own view that no plant is perpetually self-fertilised.

Contributor:
Darwin Correspondence Project
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From:
Johann Xaver Robert (Robert) Caspary
To:
Charles Robert Darwin
Date:
26 Apr 1866
Source of text:
DAR 161: 119
Summary:

Coming to London for Botanical Congress. Requests interview.

Thanks for photograph.

Contributor:
Darwin Correspondence Project
From:
Johann Xaver Robert (Robert) Caspary
To:
Charles Robert Darwin
Date:
7 May 1866
Source of text:
DAR 161: 120
Summary:

Thanks CD for invitation. Solicitous of CD’s health. Will let Hooker decide whether CD’s health will allow his visit.

[Alexander] Braun in poor health.

Contributor:
Darwin Correspondence Project
From:
Johann Xaver Robert (Robert) Caspary
To:
Charles Robert Darwin
Date:
25 May 1866
Source of text:
DAR 161: 121
Summary:

Plans to come to Down on 27 May.

Contributor:
Darwin Correspondence Project
From:
Johann Xaver Robert (Robert) Caspary
To:
Charles Robert Darwin
Date:
[after 9 June 1866]
Source of text:
DAR 109: A81; DAR 111: B45, B48b, B48c
Summary:

Data on good and bad pollen-grain yields of different species. Sends sketches of two male Rhamnus catharticus flowers [see Forms of flowers, p. 294].

Contributor:
Darwin Correspondence Project
From:
Johann Xaver Robert (Robert) Caspary
To:
Charles Robert Darwin
Date:
18 Feb 1868
Source of text:
DAR 76: B173–4
Summary:

Discusses the flowers of, and cross- and self-fertilisation in, certain aquatic plants. Gives cases of dichogamy and perfect self-fertility.

Contributor:
Darwin Correspondence Project
thumbnail
From:
Charles Robert Darwin
To:
Johann Xaver Robert (Robert) Caspary
Date:
25 Feb [1868]
Source of text:
DAR 143: 252
Summary:

Will send English edition [of Variation] when available.

Mentions revisions in second issue concerning graft-hybrids.

Asks for Euryale seed for experiment.

Discusses fertility of crossed and self-fertilised plants.

Contributor:
Darwin Correspondence Project
From:
Johann Xaver Robert (Robert) Caspary
To:
Charles Robert Darwin
Date:
2 Apr 1868
Source of text:
DAR 161: 122
Summary:

Finds important differences between English and German versions of Variation on graft-hybrids.

Experiments and observations on submerged flowers.

Contributor:
Darwin Correspondence Project
From:
Johann Xaver Robert (Robert) Caspary
To:
Charles Robert Darwin
Date:
17 Dec 1876
Source of text:
DAR 161: 123
Summary:

Thanks for copy of Cross and self-fertilisation.

Francis Darwin’s observation of nectaries in Pteris is most curious.

Doubts cross-fertilisation in the rare cases of two flowers on the same stalk in Victoria and Euryale.

Contributor:
Darwin Correspondence Project