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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 (Mss.B.D25.251)
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)
Letter no:  DCP-LETT-3425
Document type
letter (3)
Author
Addressee
Crocker, C. W.disabled_by_default
Correspondent
Date
1861 (2)
1864 (1)