From J. T. Moggridge 16 September [1869]
Summary
Thanks for CD’s ["Fertilization of orchids", Collected papers 2: 138–56].
Although Thomas Meehan’s paper ["Variations in Epigaea repens", Proc. Philadelphia Acad. Nat. Sci. (1868): 153–6] shows great variability in this genus, JTM sees a need to qualify the generalisation that there is as much variation in the wild as under domestication. He knows no evidence for a constant proportion between variability in the wild and under cultivation.
Observations on correlation between leaf size and exposure to sun and shade.
Has evidence for two varieties of Ophrys apifera in England, which live in mutually exclusive colonies.
Author: | John Traherne Moggridge |
Addressee: | Charles Robert Darwin |
Date: | 16 Sept [1869] |
Classmark: | DAR 171: 212 |
Letter no: | DCP-LETT-6894 |
From J. T. Moggridge 18 September 1869
Author: | John Traherne Moggridge |
Addressee: | Charles Robert Darwin |
Date: | 18 Sept 1869 |
Classmark: | DAR 171: 213 |
Letter no: | DCP-LETT-6899 |
From J. T. Moggridge 12 December 1869
Summary
Sends seeds of Lathyrus and suggests an advantage of climbing plants is to shed their seeds in places secure from animals.
Contrary to F. Delpino, in JTM’s experience Ophrys aranifera is not sterile. However, seed germination is poor.
In a densely overgrown plot Convolvulus sabatius, not normally a twiner, becomes one.
Continues his extensive study on variability in Arbutus, and speculates on selection in fruit shape.
Author: | John Traherne Moggridge |
Addressee: | Charles Robert Darwin |
Date: | 12 Dec 1869 |
Classmark: | DAR 171: 214 |
Letter no: | DCP-LETT-7027 |
letter | (3) |
Darwin, C. R. | (3) |
Darwin, C. R. | (3) |
Moggridge, J. T. | (3) |