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To Charles William Crocker   18 May [1861]

Summary

Describes results of his experiments with hollyhocks. Some varieties breed true even though growing near others. This suggests that their pollen is "pre-potent" over that of other varieties, which is not the case with most plants. Asks some questions on which he would be glad to have correspondent work. [See also 3170.]

Author:  Charles Robert Darwin
Addressee:  Charles William Crocker
Date:  18 May [1861]
Classmark:  Cleveland Health Sciences Library (Robert M. Stecher collection)
Letter no:  DCP-LETT-3151

To C. W. Crocker   1 June [1861]

Summary

Suggests procedures for breeding experiments with hollyhocks. Recommends C. F. v. Gärtner [Bastarderzeugung (1849)]. [See also 3151]

Author:  Charles Robert Darwin
Addressee:  Charles William Crocker
Date:  1 June [1861]
Classmark:  American Philosophical Society (251)
Letter no:  DCP-LETT-3170

To Charles William Crocker   31 January [1864]

Summary

Reminds CWC that he offered to give information with respect to his observations on hollyhocks. Wishes he could persuade CWC to undertake experiments on the fertility of some crosses between the most distinct varieties.

Author:  Charles Robert Darwin
Addressee:  Charles William Crocker
Date:  31 Jan [1864]
Classmark:  Cleveland Health Sciences Library (Robert M. Stecher collection: FF8)
Letter no:  DCP-LETT-3425

From Charles William Crocker   17 February 1862

Summary

Thanks for Primula paper [Collected papers 2: 45–63].

Separation of sexes in Billbergia.

Offers to experiment under CD’s direction, now that he has retired from Kew.

Author:  Charles William Crocker
Addressee:  Charles Robert Darwin
Date:  17 Feb 1862
Classmark:  DAR 161.2: 254
Letter no:  DCP-LETT-3449

From C. W. Crocker   [before 13 March 1862]

Summary

Will experiment on hollyhocks as CD suggests.

On desirability of a place for experiments to be set up by Government or a scientific society. Kew is too busy for experiments.

Author:  Charles William Crocker
Addressee:  Charles Robert Darwin
Date:  [before 13 Mar 1862]
Classmark:  DAR 161.2: 255
Letter no:  DCP-LETT-3464

From C. W. Crocker   13 March 1862

Summary

Informs CD where, at Kew, to find Epipactis palustris.

Has never trusted Donald Beaton.

Author:  Charles William Crocker
Addressee:  Charles Robert Darwin
Date:  13 Mar 1862
Classmark:  DAR 161.2: 256
Letter no:  DCP-LETT-3471

From C. W. Crocker   22 April 1862

Summary

Certain there are three forms of Primula sinensis.

Author:  Charles William Crocker
Addressee:  Charles Robert Darwin
Date:  22 Apr 1862
Classmark:  DAR 161.2: 257
Letter no:  DCP-LETT-3514

FromC. W. Crocker   17 May 1862

Summary

Comments on presentation copy of Orchids. Has CD studied the orchid Sobralia?

Cannot get material for hollyhock experiment.

Sends his notes on Primula sinensis.

He is experimenting on Ranunculus.

Author:  Charles William Crocker
Addressee:  Charles Robert Darwin
Date:  17 May 1862
Classmark:  DAR 108: 133, DAR 161.2: 258
Letter no:  DCP-LETT-3557

From C. W. Crocker   31 October 1862

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Summary

Difficulties in beginning experiments upon retirement.

Describes his observations on insect pollination of Antirrhinum and the effect of excluding the pollinators.

Has been observing variant forms of Plantago

and comparing local orchids with CD’s observations.

Possibility of an intermediate-styled primrose.

His experiments at Kew and J. B. Lawes’s at Harpenden on deterioration of vegetables and cereals.

Author:  Charles William Crocker
Addressee:  Charles Robert Darwin
Date:  31 Oct 1862
Classmark:  DAR 76 (ser. 2): 84a–d
Letter no:  DCP-LETT-3790

From C. W. Crocker   24 November 1862

Summary

Answers on Begonia.

Snapdragon crossing experiments.

Thanks for offer of plants.

Author:  Charles William Crocker
Addressee:  Charles Robert Darwin
Date:  24 Nov 1862
Classmark:  DAR 161.2: 259
Letter no:  DCP-LETT-3824

From Charles William Crocker   1[–4] May 1863

Summary

Observes Plantago’s out-crossing mechanism.

Observations of style lengths of primroses and cowslips.

Author:  Charles William Crocker
Addressee:  Charles Robert Darwin
Date:  1[–4] May 1863
Classmark:  DAR 110: 28, DAR 161: 260
Letter no:  DCP-LETT-4135
Document type
letter (11)
Addressee
Correspondent
Date
1861 (2)
1862 (7)
1863 (1)
1864 (1)
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