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Crüger, Hermann in correspondent 
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From:
Charles Robert Darwin
To:
Hermann Crüger
Date:
25 Jan [1863]
Source of text:
DAR 143: 358
Summary:

Asks about insect fertilisation of Melastomataceae.

Contributor:
Darwin Correspondence Project
From:
Hermann Crüger
To:
Charles Robert Darwin
Date:
23 Feb 1863
Source of text:
DAR 161: 275
Summary:

Will observe fertilisation of melastomads as CD requests.

Observations on fertilisation by ants.

Detailed observations on sexes in Catasetum, which were made before he received Orchids and which differ from CD’s findings.

Contributor:
Darwin Correspondence Project
From:
Hermann Crüger
To:
Charles Robert Darwin
Date:
23 Apr 1863
Source of text:
DAR 161: 276, DAR 205.8: 68 (Letters)
Summary:

Observations on Catasetum.

Figs require insects in order to set seed.

Contributor:
Darwin Correspondence Project
From:
Charles Robert Darwin
To:
Hermann Crüger
Date:
25 May [1863]
Source of text:
DAR 143: 359
Summary:

Thanks for news about fertilisation of Melastomataceae.

Discusses fertilisation of orchids.

Mentions observations by John Scott.

Asks about "bud-variations".

Contributor:
Darwin Correspondence Project
From:
Hermann Crüger
To:
Charles Robert Darwin
Date:
8 Aug 1863
Source of text:
DAR 161: 277, 277/1
Summary:

Thanks for presentation copy of Linum paper [Collected papers 2: 93–105].

Ficus experiments confirm CD’s supposition that insects visit Melastoma for nectar, but HC thinks pollen-seekers fertilise the flowers.

Maranta fertilisation.

Contributor:
Darwin Correspondence Project
From:
Hermann Crüger
To:
Charles Robert Darwin
Date:
21 Jan 1864
Source of text:
DAR 161: 278
Summary:

Sends his MS of orchid paper ["A few notes on the fecundation of orchids and their morphology", J. Linn. Soc. Lond. (Bot.) 8 (1865): 127–35] for CD to send to an editor.

CD was right about Catasetum sexes.

Ficus experiments fail.

Contributor:
Darwin Correspondence Project