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To John Traherne Moggridge   7 June 1869


Glad JTM intends to write a paper. Discusses JTM’s research on Arbutus.

CD’s riding accident.

Author:  Charles Robert Darwin
Addressee:  John Traherne Moggridge
Date:  7 June 1869
Classmark:  DAR 146: 377
Letter no:  DCP-LETT-6777

From J. T. Moggridge   16 September [1869]


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


Leaflet variation at the tip of Lathyrus stems.

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


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
Document type
letter (4)
Darwin, C. R.[X]
Moggridge, J. T.[X]
06 (1)
09 (2)
12 (1)