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To Fritz Müller   9 May 1877

Summary

Is printing a book on dimorphic plants [Forms of flowers] in which he will make considerable use of FM’s work.

Author:  Charles Robert Darwin
Addressee:  Johann Friedrich Theodor (Fritz) Müller
Date:  9 May 1877
Classmark:  The British Library (Loan MS 10 no 41)
Letter no:  DCP-LETT-10954

To Fritz Müller   14 May 1877

Summary

Requests observations on sensitive Mimosa and movements of plants in rain.

Worm-castings.

Author:  Charles Robert Darwin
Addressee:  Johann Friedrich Theodor (Fritz) Müller
Date:  14 May 1877
Classmark:  The British Library (Loan MS 10 no 42)
Letter no:  DCP-LETT-10960

To Fritz Müller   13 November 1877

Summary

Asks for Cassia seed for experiments.

Author:  Charles Robert Darwin
Addressee:  Johann Friedrich Theodor (Fritz) Müller
Date:  13 Nov 1877
Classmark:  The British Library (Loan MS 10 no 43)
Letter no:  DCP-LETT-11233

From Fritz Müller   25 March 1877

Summary

Thanks CD for new [2d] edition of Orchids.

Mentions some observations on dimorphic plants.

Reports on a third species of Pontederia [see Forms of flowers, p. 185].

Describes some unusual grasses.

Reports rumours from southern Brazil concerning the existence of a gigantic subterranean animal.

Author:  Johann Friedrich Theodor (Fritz) Müller
Addressee:  Charles Robert Darwin
Date:  25 Mar 1877
Classmark:  DAR 111: A89–90
Letter no:  DCP-LETT-10911

From Fritz Müller   19 October 1877

Summary

Doubts that glands of calyx of cleistogamic Malpighiaceae serve as protection.

Some species of Solanum bear long- and short-styled flowers on same plant.

Changing colours of some flowers may show insects the proper moment for fertilisation.

Doubts that the style of Pontederia cordata changes length.

Sexual difference in wings of some butterflies due to development in male of scales that emit odours to excite female.

Author:  Johann Friedrich Theodor (Fritz) Müller
Addressee:  Charles Robert Darwin
Date:  19 Oct 1877
Classmark:  Möller ed. 1915–21, 2: 363–4; Nature, 29 November 1877, pp. 78–9
Letter no:  DCP-LETT-11191

From Fritz Müller   [27 November 1877]

Summary

Sends proboscis of a Sphinx-moth that is 22 cms long.

Discusses eleven species of butterfly which visit Lantana, a plant which blooms only for three days and whose flowers are yellow on the first day, orange on the second, and purple on the third. Most species only visit the flowers when they are yellow.

Describes and draws the odiferous organs of a Sphinx-moth.

Describes a secondary sexual character of several species of Callidryas and other Pierinæ: the costal margin of the anterior wing is sharply serrated in the males, while it is smooth in the females.

Author:  Johann Friedrich Theodor (Fritz) Müller
Addressee:  Charles Robert Darwin
Date:  [27 November 1877]
Classmark:  Transactions of the Entomological Society of London (1878): (Proceedings) ii–iii
Letter no:  DCP-LETT-11255F
Document type
letter (6)
Addressee
Correspondent
Darwin, C. R.[X]
Müller, Fritz[X]
Date
1877
03 (1)
05 (2)
10 (1)
11 (2)
letter