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To Richard Spruce   1 April 1869


RS’s facts are remarkable. A year or two ago CD would not have believed ants could produce an inherited effect, but he has "lately come to believe rather more in inherited mutations". However, CD is not satisfied that the sacs are inherited and urges RS to produce any other evidence he might have.

Author:  Charles Robert Darwin
Addressee:  Richard Spruce
Date:  1 Apr 1869
Classmark:  Spruce 1908, 2: 385
Letter no:  DCP-LETT-6691

From Richard Spruce   [1876–7]


Notes on various instances of dimorphic stamens.

Author:  Richard Spruce
Addressee:  Charles Robert Darwin
Date:  [1876–7]
Classmark:  DAR 109: B119
Letter no:  DCP-LETT-4372

From Richard Spruce   [before 1 April 1869]


Sends CD a paper ["Ant-agency in plant structure", published in Spruce Notes of a botanist on the Amazon and Andes, ed. A. R. Wallace (1908)] on plant structures he believes are the work of insects; asks him to forward it to the Linnean Society [read 15 Apr 1869].

Writes of his support for the Origin, before which he had been much concerned by the delimitation of so-called species.

Author:  Richard Spruce
Addressee:  Charles Robert Darwin
Date:  [before 1 Apr 1869]
Classmark:  DAR 177: 241
Letter no:  DCP-LETT-6690

From Richard Spruce   15 April 1869


Describes the floral structure and fertilisation of some melastomes;

discusses the direct agency of insects in modifying the structure of flowers.

Author:  Richard Spruce
Addressee:  Charles Robert Darwin
Date:  15 Apr 1869
Classmark:  DAR 177: 242
Letter no:  DCP-LETT-6697
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Darwin, C. R.disabled_by_default
Spruce, Richarddisabled_by_default
1869 (3)
1876 (1)