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To James Drummond   16 May 1860

Summary

Asks JD to observe Leschenaultia formosa to verify CD’s hypothesis of how it is fertilised. Also suggests an experiment to determine whether it is fertilised by nocturnal insects.

Author:  Charles Robert Darwin
Addressee:  James Drummond
Date:  16 May 1860
Classmark:  J. S. Battye Library of Western Australian History, State Library of Western Australia (Accession 2275A)
Letter no:  DCP-LETT-2803

From James Drummond   17 September 1860

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Summary

Reports observations on the fertilisation of Goodeniaceae, and particularly Leschenaultia. [See 2992.]

Author:  James Drummond
Addressee:  Charles Robert Darwin
Date:  17 Sept 1860
Classmark:  DAR 157a
Letter no:  DCP-LETT-2920A

From James Drummond   8 October 1860

Summary

Observations of Brunonia and a case of a malvaceous flower, which never opened and was self-fertilised.

Author:  James Drummond
Addressee:  Charles Robert Darwin
Date:  8 Oct 1860
Classmark:  DAR 162.2: 242
Letter no:  DCP-LETT-2944

To James Drummond   22 November [1860]

Summary

JD’s letter of 17 Sept about Leschenaultia not seeding is surprising. CD’s experiments point to insects which, though perhaps not indispensable to their fertilisation, are useful to it. Would like to know whether the flower of Leschenaultia is visited by bees or other insects.

JD’s offer to send seeds of Distylis and the other genus is of greatest possible interest.

Author:  Charles Robert Darwin
Addressee:  James Drummond
Date:  22 Nov [1860]
Classmark:  J. S. Battye Library of Western Australian History, State Library of Western Australia (Accession 2275A)
Letter no:  DCP-LETT-2992

To James Drummond   20 December [1860]

Summary

Responds to JD’s letter [2944]. Would like to know whether bees extract pollen from within the indusium of Leschenaultia. He suspects they brush over and partly open the indusium while sucking nectar from the flower.

Asks also about malvaceous plant that set seed although its flower never opened.

Has been watching the achenia of the plant sent by JD and, if Hooker agrees, will publish a note on it ["Achenia of Pumilio argyrolepis", Collected papers 2: 36–8].

Author:  Charles Robert Darwin
Addressee:  James Drummond
Date:  20 Dec [1860]
Classmark:  J. S. Battye Library of Western Australian History, State Library of Western Australia (Accession 2275A)
Letter no:  DCP-LETT-3026
Document type
letter (5)
Correspondent
Date
1860 (5)
letter