From Asa Gray 3 July 1880
Summary
Confirmation of CD’s idea: AG planted seeds Ipomœa pandurata. One seed has come up and its germination is same as of I. leptophylla.
Author: | Asa Gray |
Addressee: | Charles Robert Darwin |
Date: | 3 July 1880 |
Classmark: | DAR 186: 52 |
Letter no: | DCP-LETT-12646F |
From Asa Gray 29 July [1880]
Author: | Asa Gray |
Addressee: | Charles Robert Darwin |
Date: | 29 July [1880] |
Classmark: | DAR 186: 53 |
Letter no: | DCP-LETT-12674F |
From Asa Gray 27 January 1881
Summary
Apologises for his silence when Francis Darwin’s paper was read at the Linnean Society.
AG’s review of Movement in plants [Nation 32 (1881): 17–18].
Author: | Asa Gray |
Addressee: | Charles Robert Darwin |
Date: | 27 Jan 1881 |
Classmark: | DAR 165: 203 |
Letter no: | DCP-LETT-13028 |
From Asa Gray 22 May 1855
Author: | Asa Gray |
Addressee: | Charles Robert Darwin |
Date: | 22 May 1855 |
Classmark: | DAR 106: D1–D2 |
Letter no: | DCP-LETT-1685 |
From Asa Gray 30 June 1855
Summary
Sends a list of "close" species from his Manual of botany.
Hopes Hooker or CD will write an essay on species. Discusses some of the difficulties of defining botanical species.
Author: | Asa Gray |
Addressee: | Charles Robert Darwin |
Date: | 30 June 1855 |
Classmark: | DAR 165: 92a |
Letter no: | DCP-LETT-1707 |
From Asa Gray [early August 1856]
Summary
Believes intermediate varieties are generally less numerous in individuals than the two states that they connect.
Discusses the difficulties of deciding what is the typical form of a species
and gives some opinions on the variability of introduced species compared with indigenous species.
Author: | Asa Gray |
Addressee: | Charles Robert Darwin |
Date: | [early Aug 1856] |
Classmark: | DAR 165: 93 |
Letter no: | DCP-LETT-1934 |
From Asa Gray 23 September 1856
Summary
Plants that are social in the U. S. but are not so in the Old World.
Distribution of U. S. species common to Europe.
Gives Theodor Engelmann’s opinion on the relative variability of indigenous and introduced plants and notes the effects of man’s settlement on the numbers and distribution of indigenous plants.
Author: | Asa Gray |
Addressee: | Charles Robert Darwin |
Date: | 23 Sept 1856 |
Classmark: | DAR 165: 94 |
Letter no: | DCP-LETT-1959 |
From Asa Gray 4 November 1856
Summary
Outlines the ranges of northern U. S. species common to Europe. Hopes to investigate the resemblances between the floras of the north-eastern U. S. and western Europe. Discusses routes by which alpine plants appear to have reached U. S.
Author: | Asa Gray |
Addressee: | Charles Robert Darwin |
Date: | 4 Nov 1856 |
Classmark: | DAR 165: 95 |
Letter no: | DCP-LETT-1982 |
From Asa Gray 16 February 1857
Summary
Discusses the ranges of alpine species in U. S. and considers the possible migration routes of such species from Europe.
Lists those U. S. genera which he considers protean and describes the U. S. character of some genera which are protean in Europe.
Describes how he distinguishes introduced and aboriginal stocks of the same species.
Author: | Asa Gray |
Addressee: | Charles Robert Darwin |
Date: | 16 Feb 1857 |
Classmark: | DAR 165: 96 |
Letter no: | DCP-LETT-2053 |
From Asa Gray 1 June 1857
Summary
Comments on species with disjoined ranges; does not feel, despite CD’s expectations, that they tend to belong to small families.
Gives the proportion of U. S. trees in which the sexes are separate [see Natural selection, p. 62].
Author: | Asa Gray |
Addressee: | Charles Robert Darwin |
Date: | 1 June 1857 |
Classmark: | DAR 8: 47bA |
Letter no: | DCP-LETT-2098 |
From Asa Gray [c. 24 May 1857]
Summary
Discusses difficulties involved in deciding which genera are protean in the light of some comments by H. C. Watson.
Author: | Asa Gray |
Addressee: | Charles Robert Darwin |
Date: | [c. 24 May 1857] |
Classmark: | DAR 165: 97 |
Letter no: | DCP-LETT-2104 |
From Asa Gray 7 July 1857
Summary
Believes, with CD, that extinction may be an important factor in explaining plant distributions, but sees no reason why the several species of a genus must ever have had a common or continuous area. "Convince me of that, or show me any good grounds for it … and I think you would carry me a good way with you". It is just such people as AG that CD has to satisfy and convince.
Feels that the crossing of individuals is important in repressing variation and perhaps in perpetuating the species, but instances some plants in which it cannot, apparently, take place.
Author: | Asa Gray |
Addressee: | Charles Robert Darwin |
Date: | 7 July 1857 |
Classmark: | DAR 205.9: 381; DAR 165: 98 |
Letter no: | DCP-LETT-2120 |
From Asa Gray [August 1857]
Summary
States he has "misgivings about the definiteness of species". Believes there is some inherent tendency for plants to originate varieties. Cross-fertilisation is likely in most cases but sees difficulties with plants like Adlumia.
Author: | Asa Gray |
Addressee: | Charles Robert Darwin |
Date: | [Aug 1857] |
Classmark: | DAR 165: 100, 101 |
Letter no: | DCP-LETT-2129 |
From Asa Gray [before 3 April 1858]
Author: | Asa Gray |
Addressee: | Charles Robert Darwin |
Date: | [before 3 Apr 1858] |
Classmark: | DAR 165: 103 |
Letter no: | DCP-LETT-2249 |
From Asa Gray 21 June 1858
Author: | Asa Gray |
Addressee: | Charles Robert Darwin |
Date: | 21 June 1858 |
Classmark: | DAR 76: B15 |
Letter no: | DCP-LETT-2288 |
From Asa Gray [25 February 1868 or later]
Summary
Discusses arrangements for American edition of Variation.
Observations on apparently inherited instinct in a dog.
Author: | Asa Gray |
Addressee: | Charles Robert Darwin |
Date: | [25 Feb 1868 or later] |
Classmark: | DAR 165: 102 |
Letter no: | DCP-LETT-2563 |
From Asa Gray [10 January 1860]
Summary
Agassiz denounces Origin as "atheistical";
AG is currently reviewing it [in Am. J. Sci. 2d ser. 29 (1860): 153–84].
Jeffries Wyman praises it, though not a convert.
Author: | Asa Gray |
Addressee: | Charles Robert Darwin |
Date: | [10 Jan 1860] |
Classmark: | DAR 98 (ser. 2): 26a |
Letter no: | DCP-LETT-2631 |
From Asa Gray 23 January 1860
Summary
American edition of Origin. AG’s assessment of the book’s weak and strong points. Suggests Jeffries Wyman would be a useful source of facts and hints for CD.
Author: | Asa Gray |
Addressee: | Charles Robert Darwin |
Date: | 23 Jan 1860 |
Classmark: | DAR 98 (ser. 2): 22–5 |
Letter no: | DCP-LETT-2663 |
From Asa Gray 20 February 1860
Summary
Arrangements for the American edition of Origin.
Author: | Asa Gray |
Addressee: | Charles Robert Darwin |
Date: | 20 Feb 1860 |
Classmark: | Gray Herbarium of Harvard University (37) |
Letter no: | DCP-LETT-2706 |
From Asa Gray [10 July 1860]
Summary
Cases of "dioecio-dimorphism" as in primroses are widespread. AG always considered them the first step toward bisexuality.
Author: | Asa Gray |
Addressee: | Charles Robert Darwin |
Date: | [10 July 1860] |
Classmark: | DAR 110 (ser. 2): 77 |
Letter no: | DCP-LETT-2819 |
Gray, Asa | (126) |
Gray, J. L. | (1) |
Darwin, C. R. | (126) |
Gray, Asa | |
Gray, J. L. | (1) |