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From Thomas Bell Salter 25 June 1855
Summary
Discusses hybrid plants he has raised, particularly hybrids between Geum urbanum and G. rivale, which are very fertile and exhibit great variability. [See Natural selection, p. 102.]
| Author: | Thomas Bell Salter |
| Addressee: | Charles Robert Darwin |
| Date: | 25 June 1855 |
| Classmark: | DAR 177: 16 (fragile) |
| Letter no: | DCP-LETT-1703 |
