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 Nov 1877] |
Classmark: | Transactions of the Entomological Society of London (1878): (Proceedings) ii–iii |
Letter no: | DCP-LETT-11255F |