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Crüger, Hermann in author 
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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:
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