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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 |
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 | (4) |
Author
| Crüger, Hermann | (4) |
