To Asa Gray 21 February [1858]
Summary
Asks whether botanists tend to record varieties more carefully in large genera or small genera.
Wants information on the ranges of varieties of a species compared to the range of the species.
| Author: | Charles Robert Darwin |
| Addressee: | Asa Gray |
| Date: | 21 Feb [1858] |
| Classmark: | Archives of the Gray Herbarium, Harvard University (21) |
| Letter no: | DCP-LETT-2218 |
To Asa Gray 11 August [1858]
Summary
Species migration since the Pliocene. Effect of the glacial epoch. Present geographical distribution, especially similarities of mountain floras, explained by such migration; mountain summits as remnants of a once continuous flora and fauna.
Cross-fertilisation in Fumariaceae.
| Author: | Charles Robert Darwin |
| Addressee: | Asa Gray |
| Date: | 11 Aug [1858] |
| Classmark: | Archives of the Gray Herbarium, Harvard University (42 and 9a) |
| Letter no: | DCP-LETT-2321 |
From Asa Gray 21 June 1858
Summary
Self-fertilisation in Fumariaceae.
[CD note on bees’ visiting some members of Fumariaceae.]
| Author: | Asa Gray |
| Addressee: | Charles Robert Darwin |
| Date: | 21 June 1858 |
| Classmark: | DAR 76: B15 |
| Letter no: | DCP-LETT-2288 |
Matches: 1 hit
- … 1857] ). CD investigated the subject experimentally in June 1858 (see n. 2, below). The note forms part of CD’s record of observations made in May and June on the fertilisation of these and similar leguminous flowers by bees. The letter is bound with CD’s other slips and notes on the topic in DAR 76. See also letter to J. D. Hooker, …
To Asa Gray 4 July 1858
Summary
Believes that, in Dicentra, Fumaria and Corydalis, flower structures are related directly to visits from bees. Flower stigmas generally are placed in the path of bees.
Has received paper from Wallace on natural selection; has sent abstract of his notions, with Wallace’s paper, to Linnean Society.
| Author: | Charles Robert Darwin |
| Addressee: | Asa Gray |
| Date: | 4 July 1858 |
| Classmark: | Archives of the Gray Herbarium, Harvard University (20) |
| Letter no: | DCP-LETT-2302 |
Matches: 1 hit
- … 1857] . See letter to Charles Lyell, 18 [June 1858] . Alfred Russel Wallace had set out for New Guinea on 25 March 1858. He returned to the island of Ternate three or four months later ( Wallace 1905 ,1: 363–4). CD’s and Wallace’s papers had been read at a meeting of the Linnean Society on 1 July 1858. See letter from J. D. Hooker …
| letter | (4) |
| Darwin, C. R. | (3) |
| Gray, Asa | (1) |
| Gray, Asa | (3) |
| Darwin, C. R. | (1) |
| Darwin, C. R. | (4) |
| Gray, Asa |
