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From J. D. Hooker [16? October 1864]
Summary
Morphological differences only partly define species; physiological differences, e.g., incompatibility results in Primula, are far more interesting.
T. Thomson’s review of Agardh’s muddled book ["Agardh’s classification of plants", Nat. Hist. Rev. (1864): 536–51].
| Author: | Joseph Dalton Hooker |
| Addressee: | Charles Robert Darwin |
| Date: | [16? Oct 1864] |
| Classmark: | DAR 101: 246, 246a |
| Letter no: | DCP-LETT-4638 |
Author
| Hooker, J. D. | (1) |
Addressee
| Darwin, C. R. | (1) |
