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To Hermann Crüger   25 January [1863]

Summary

Asks about insect fertilisation of Melastomataceae.

Author:  Charles Robert Darwin
Addressee:  Hermann Crüger
Date:  25 Jan [1863]
Classmark:  DAR 143: 358
Letter no:  DCP-LETT-3943

From Hermann Crüger   23 February 1863

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.

Author:  Hermann Crüger
Addressee:  Charles Robert Darwin
Date:  23 Feb 1863
Classmark:  DAR 161: 275
Letter no:  DCP-LETT-4008

From Hermann Crüger   23 April 1863

Summary

Observations on Catasetum.

Figs require insects in order to set seed.

Author:  Hermann Crüger
Addressee:  Charles Robert Darwin
Date:  23 Apr 1863
Classmark:  DAR 161: 276, DAR 205.8: 68 (Letters)
Letter no:  DCP-LETT-4124

To Hermann Crüger   25 May [1863]

Summary

Thanks for news about fertilisation of Melastomataceae.

Discusses fertilisation of orchids.

Mentions observations by John Scott.

Asks about "bud-variations".

Author:  Charles Robert Darwin
Addressee:  Hermann Crüger
Date:  25 May [1863]
Classmark:  DAR 143: 359
Letter no:  DCP-LETT-4184

From Hermann Crüger   8 August 1863

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.

Author:  Hermann Crüger
Addressee:  Charles Robert Darwin
Date:  8 Aug 1863
Classmark:  DAR 161: 277, 277/1
Letter no:  DCP-LETT-4265

From Hermann Crüger   21 January 1864

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.

Author:  Hermann Crüger
Addressee:  Charles Robert Darwin
Date:  21 Jan 1864
Classmark:  DAR 161: 278
Letter no:  DCP-LETT-4394
Document type
letter (6)
Correspondent
Date
1863 (5)
1864 (1)
letter