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 4 April [1858]
Summary
Discusses the variation of species in large and small genera.
Thanks AG for his list of close species.
Laments the slow progress he makes with his book [Natural selection].
| Author: | Charles Robert Darwin |
| Addressee: | Asa Gray |
| Date: | 4 Apr [1858] |
| Classmark: | Archives of the Gray Herbarium, Harvard University (25) |
| Letter no: | DCP-LETT-2252 |
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 |
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 |
To Asa Gray 18 November [1858]
Summary
Wishes to know whether differences in constitution (such as disease susceptibility) are related to differences in complexion. "Liability to such a disease as yellow fever would answer my question in the best possible way."
| Author: | Charles Robert Darwin |
| Addressee: | Asa Gray |
| Date: | 18 Nov [1858] |
| Classmark: | Gray Herbarium of Harvard University (19) |
| Letter no: | DCP-LETT-2364 |
From Asa Gray [before 3 April 1858]
Summary
List of close species taken from AG’s Manual of botany [1848].
| 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
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 |
