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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 |
Addressee
| Darwin, C. R. | (1) |
Correspondent
| Darwin, C. R. | (1) |
| Gray, Asa |
