To J. D. Hooker 4 December [1854]
Summary
Is Bentham’s list of aberrant genera biased by exclusion of genera with many species?
JDH’s belief that Aquilegia varieties are one species is consistent with their great interfertility.
| Author: | Charles Robert Darwin |
| Addressee: | Joseph Dalton Hooker |
| Date: | 4 Dec [1854] |
| Classmark: | DAR 114: 159 |
| Letter no: | DCP-LETT-1610 |
From J. D. Hooker 5 December [1854]
Summary
Bentham’s list of aberrant genera: CD’s worry that he eliminated large genera a priori is half right. He eliminated those large, anomalous genera that virtually constitute natural orders. JDH criticises CD’s tabulations of aberrants.
Difficulty of distinguishing affinity and analogy in plants.
| Author: | Joseph Dalton Hooker |
| Addressee: | Charles Robert Darwin |
| Date: | 5 Dec [1854] |
| Classmark: | DAR 205.9: 388–90 |
| Letter no: | DCP-LETT-1611 |
To J. D. Hooker 11 [December 1854]
Summary
Debates aberrant species, e.g., Ornithorhynchus and Echidna, with JDH. CD argues they are result of extinction having removed intermediate links to allied forms.
Studying effects of disuse in wings of tame and wild ducks.
Tabulations showing that number of species in a genus is not correlated with number of genera in an order.
| Author: | Charles Robert Darwin |
| Addressee: | Joseph Dalton Hooker |
| Date: | 11 [Dec 1854] |
| Classmark: | DAR 114: 148 |
| Letter no: | DCP-LETT-1612 |
From J. D. Hooker [3 November 1854]
Summary
JDH’s contempt for R. I. Murchison.
There is a Cyperus species and a Pteris species endemic to hot volcanoes of Ischia. Why are there no other migrators?
| Author: | Joseph Dalton Hooker |
| Addressee: | Charles Robert Darwin |
| Date: | [3 Nov 1854] |
| Classmark: | DAR 104: 214–15 |
| Letter no: | DCP-LETT-1629 |
| letter | (24) |
| Darwin, C. R. | (14) |
| Hooker, J. D. | (10) |
| Hooker, J. D. | (14) |
| Darwin, C. R. | (10) |
| Darwin, C. R. | (24) |
| Hooker, J. D. | (24) |
