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To Asa Gray 14 July [1856]
Summary
Asks whether Allegheny Mountains are sufficiently continuous so that plants could travel from north to south along them.
Hopes AG’s work on geographical distribution is progressing, as he has questions on plants common to Europe which do not range up to Arctic.
Are intermediate varieties less numerous in individuals than the varieties they connect?
| Author: | Charles Robert Darwin |
| Addressee: | Asa Gray |
| Date: | 14 July [1856] |
| Classmark: | Archives of the New York Botanical Garden (Charles Finney Cox Collection) |
| Letter no: | DCP-LETT-1926 |
Author
| Darwin, C. R. | (1) |
Correspondent
| Darwin, C. R. | |
| Gray, Asa | (1) |
