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To Asa Gray   22 January [1862]

Summary

Dimorphism: "new cases are tumbling in almost daily".

U. S. politics.

Author:  Charles Robert Darwin
Addressee:  Asa Gray
Date:  22 Jan [1862]
Classmark:  Gray Herbarium of Harvard University (74)
Letter no:  DCP-LETT-3404

To Asa Gray   16 February [1862]

Summary

Floral structure of Melastoma. Asks AG to observe position of pistils in lately-opened flowers of different plants.

Author:  Charles Robert Darwin
Addressee:  Asa Gray
Date:  16 Feb [1862]
Classmark:  Gray Herbarium of Harvard University (63)
Letter no:  DCP-LETT-3448

From Asa Gray   18 February 1862

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Summary

Discusses politics in the U. S. and relations between Britain and America.

Author:  Asa Gray
Addressee:  Charles Robert Darwin
Date:  18 Feb 1862
Classmark:  DAR 165: 106
Letter no:  DCP-LETT-3451

From Asa Gray   6 March [1862]

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Summary

Will observe Rhexia for CD to see whether it is dimorphic.

Author:  Asa Gray
Addressee:  Charles Robert Darwin
Date:  6 Mar [1862]
Classmark:  DAR 165: 107
Letter no:  DCP-LETT-3467

To Asa Gray   15 March [1862]

Summary

Gives some observations on changes in pistil position with age in Monochaetum. Asks whether AG can observe Rhexia for similar movements.

"One of the best men, though at present unknown", H. W. Bates, has taken up natural selection.

Author:  Charles Robert Darwin
Addressee:  Asa Gray
Date:  15 Mar [1862]
Classmark:  Gray Herbarium of Harvard University (64)
Letter no:  DCP-LETT-3473

From Asa Gray   31 March [1862]

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Summary

Has been reading J. D. Morell’s new book on psychology [An introduction to mental philosophy, on the inductive method (1862)].

Progress of the Civil War.

Author:  Asa Gray
Addressee:  Charles Robert Darwin
Date:  31 Mar [1862]
Classmark:  DAR 165: 108
Letter no:  DCP-LETT-3489

To Asa Gray   21 April [1862]

Summary

Is sending first half of orchid book.

Feels he is wrong about Melastoma.

Author:  Charles Robert Darwin
Addressee:  Asa Gray
Date:  21 Apr [1862]
Classmark:  Gray Herbarium of Harvard University (65)
Letter no:  DCP-LETT-3513

From Asa Gray   18 May 1862

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Summary

Has received first sheets of Orchids and is very impressed. "What a skill & genius you have for these researches."

Details of U. S. orchids.

Author:  Asa Gray
Addressee:  Charles Robert Darwin
Date:  18 May 1862
Classmark:  DAR 165: 109
Letter no:  DCP-LETT-3559

From Asa Gray   [2 June 1862]

Summary

Discusses heterostyly in Houstonia.

Author:  Asa Gray
Addressee:  Charles Robert Darwin
Date:  [2 June 1862]
Classmark:  DAR 110 (ser. 2): 66
Letter no:  DCP-LETT-3588

To Asa Gray   10–20 June [1862]

Summary

Thanks AG for praise of Orchids and his notes on several American species of orchid. Comments on AG’s observations.

Is experimenting [on dimorphism] with Rhexia and Melastoma.

Asks AG’s opinion of a paper by Thomas Meehan ["On the uniformity of relative characters between allied species of European and American trees", Proc. Philadelphia Acad. Nat. Sci. (1862): 10–13] which is the best case of the apparently direct action of the conditions of life CD has seen.

Requests postage stamp for his ill son [Leonard].

Thanks AG for observations on Cypripedium and gives recent observations of his own.

Arethusa is very pretty; structure seems like that of Vanilla.

Finds the little (so-called imperfect) flowers of Viola and Oxalis curious: the pollen-grains emit their tubes whilst within the anthers, and they travel in straight lines right to the stigmas.

Sympathises with events in the U. S.

Reports on French translation of Origin by Mlle C. Royer, "one of the cleverest & oddest women in Europe".

Alphonse de Candolle says he wants direct proof of natural selection; "he will have to wait a long time for that".

Author:  Charles Robert Darwin
Addressee:  Asa Gray
Date:  10–20 June [1862]
Classmark:  Gray Herbarium of Harvard University (66)
Letter no:  DCP-LETT-3595

From Asa Gray   [late June 1862]

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Summary

Has not had time to look at Rhexia.

Progress of Civil War.

Author:  Asa Gray
Addressee:  Charles Robert Darwin
Date:  [late June 1862]
Classmark:  DAR 165: 110
Letter no:  DCP-LETT-3631

To Asa Gray   1 July [1862]

Summary

Thanks for notes on Cypripedium and Platanthera hookeri, which is really beautiful and quite a new case.

His son, George, has been observing the insect fertilisation of orchids.

CD has been crossing peloric flowers of Pelargonium, but doubts he will get good results with respect to sterility of hybrids.

Rhexia glandulosa does not appear to be dimorphic. Lythrum is trimorphic.

Author:  Charles Robert Darwin
Addressee:  Asa Gray
Date:  1 July [1862]
Classmark:  Gray Herbarium of Harvard University (69)
Letter no:  DCP-LETT-3634

From Asa Gray   2–3 July 1862

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Summary

Discusses dimorphic plants and the occurrence of "precocious fertilisation" in the bud.

Gives some comments on design in nature in the light of the translator’s commentary in the French edition of the Origin.

Reports the recent events of the Civil War.

[Note on verso of envelope:] Utricularia vulgaris is "about as neatly contrived for cross-fertilisation by insects as almost any orchid".

Author:  Asa Gray
Addressee:  Charles Robert Darwin
Date:  2–3 July 1862
Classmark:  DAR 165: 110a, 112–12a
Letter no:  DCP-LETT-3637

To Asa Gray   14 July [1862]

Summary

Adaptations of orchid flowers. Believes the structure of all irregular flowers is adaptation to insect fertilisation.

Linum grandiflorum distinguishes its own pollen so that when placed on stigma of same flower the pollen-tube is not even exserted.

Author:  Charles Robert Darwin
Addressee:  Asa Gray
Date:  14 July [1862]
Classmark:  Gray Herbarium of Harvard University (70)
Letter no:  DCP-LETT-3656

From Asa Gray   15 July [1862]

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Summary

Observations on Platanthera.

Possibility of trimorphism in Mertensia.

Author:  Asa Gray
Addressee:  Charles Robert Darwin
Date:  15 July [1862]
Classmark:  DAR 110 (ser. 2): 116, DAR 165: 113
Letter no:  DCP-LETT-3659

From Asa Gray   21 July 1862

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Summary

Encloses stamps for Leonard Darwin.

Author:  Asa Gray
Addressee:  Charles Robert Darwin
Date:  21 July 1862
Classmark:  DAR 165: 114
Letter no:  DCP-LETT-3661

To Asa Gray   23[–4] July [1862]

Summary

AG’s orchid observations are admirable.

Owen has lectured on birds’ descending from one form.

French criticism of CD’s Primula paper.

Only AG has seen that Orchids was "a ""flank movement"" on the enemy".

Author:  Charles Robert Darwin
Addressee:  Asa Gray
Date:  23[–4] July [1862]
Classmark:  Gray Herbarium of Harvard University (76)
Letter no:  DCP-LETT-3662

To Asa Gray   28 July [1862]

Summary

AG’s "capital" review of Orchids [Am. J. Sci. 2d ser. 34 (1862): 138–44].

Thinks there are three forms of Lythrum salicaria.

Discusses transport of seeds by sea.

Author:  Charles Robert Darwin
Addressee:  Asa Gray
Date:  28 July [1862]
Classmark:  Gray Herbarium of Harvard University (75)
Letter no:  DCP-LETT-3667

From Asa Gray   29 July 1862

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Summary

Is observing Gymnadenia tridentata.

Has received six copies of Orchids.

Author:  Asa Gray
Addressee:  Charles Robert Darwin
Date:  29 July 1862
Classmark:  DAR 165: 115
Letter no:  DCP-LETT-3670

From Asa Gray   4 August 1862

Summary

Gives J. T. Rothrock’s observations on the structure and fertility of the two forms of Houstonia. Mentions his own observations on Rhexia virginica and Gymnadenia tridentata.

Author:  Asa Gray
Addressee:  Charles Robert Darwin
Date:  4 Aug 1862
Classmark:  DAR 110 (ser. 2): 67–9
Letter no:  DCP-LETT-3679
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