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To Daniel Oliver   20 [January 1863]

Summary

Has been copying out references from Natural History Review [possibly D. Oliver, "The structure of the stem in dicotyledons; being references to the literature of the subject", Nat. Hist. Rev. n.s. 2 (1862): 298–329].

Suggests DO study high incidence of separate sexes in freshwater plants.

Author:  Charles Robert Darwin
Addressee:  Daniel Oliver
Date:  20 [Jan 1863]
Classmark:  DAR 261.10: 38 (EH 88206021)
Letter no:  DCP-LETT-3776

To Daniel Oliver   20 [February 1863]

Summary

Having trouble understanding laws of phyllotaxy in order to grasp Hugh Falconer’s objections.

L. C. Treviranus on Primula [see 3980] misses the "prettiness" of the adaptations.

John Scott says P. scotica is never dimorphic.

Author:  Charles Robert Darwin
Addressee:  Daniel Oliver
Date:  20 [Feb 1863]
Classmark:  DAR 261.10: 41 (EH 88206024)
Letter no:  DCP-LETT-4052

To Daniel Oliver   24–5 March [1863]

Summary

Observation on morphology of Primula ovarium sent for DO’s use.

Author:  Charles Robert Darwin
Addressee:  Daniel Oliver
Date:  24–5 Mar [1863]
Classmark:  DAR 261.10: 42 (EH 88206025)
Letter no:  DCP-LETT-4059

To Daniel Oliver   28 March [1863]

Summary

Nectar secretion in Edwardsia. Could the stamen protect stigma?

Sends monstrous Primula with three pistils.

Had never heard of Robert Caspary, but what DO thinks is the placenta could be a whorl of pistils without stigmas.

Author:  Charles Robert Darwin
Addressee:  Daniel Oliver
Date:  28 Mar [1863]
Classmark:  DAR 261.10: 43 (EH 88206026)
Letter no:  DCP-LETT-4063

To Daniel Oliver   [12 April 1863]

Summary

Working on monstrous Primula. Is ovule anatropous as Asa Gray says, or amphitropous? Does he know natural path of pollen tubes in Primula. Can the tube enter the ovule by the chalaza?

Author:  Charles Robert Darwin
Addressee:  Daniel Oliver
Date:  [12 Apr 1863]
Classmark:  DAR 261.10: 46 (EH 88206029)
Letter no:  DCP-LETT-4083

To Daniel Oliver   [after 14 April 1863]

Summary

Thanks for information on Primula ovules. From what DO says the pollen-tubes ought to find their way to the micropyle.

Author:  Charles Robert Darwin
Addressee:  Daniel Oliver
Date:  [after 14 Apr 1863]
Classmark:  DAR 147: 214
Letter no:  DCP-LETT-4095

To Daniel Oliver   18 July [1863]

Summary

Sends F. Hildebrand’s paper for publication by the Linnean Society or in Natural History Review.

Author:  Charles Robert Darwin
Addressee:  Daniel Oliver
Date:  18 July [1863]
Classmark:  DAR 261.10: 51 (EH 88206034)
Letter no:  DCP-LETT-4244

To Daniel Oliver   [before 27 November 1863]

Summary

Recommends Wyman’s short notice ["Report on Dr Jeffries Wyman’s experiment on the cause of contractility in vegetable tissues"] in the Proceedings of the American Academy of Arts and Sciences 3 (1852–7): 167.

Author:  Charles Robert Darwin
Addressee:  Daniel Oliver
Date:  [before 27 Nov 1863]
Classmark:  DAR 261.10: 53 (EH 88206036)
Letter no:  DCP-LETT-4327

To Daniel Oliver   28 [November 1863]

Summary

Fertile flowers of violets, except Viola tricolor, require insect visits.

Author:  Charles Robert Darwin
Addressee:  Daniel Oliver
Date:  28 [Nov 1863]
Classmark:  DAR 261.10: 54 (EH 88206037)
Letter no:  DCP-LETT-4350
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