From Fritz Müller 13 February 1866
Summary
Thanks CD for Journal of researches.
Insect genus Elater is an exception to the rule that all luminous organs give out a green light.
Gives some observations on climbing plants at Itajahy.
His study of orchids has convinced him of the value of CD’s book.
Author: | Johann Friedrich Theodor (Fritz) Müller |
Addressee: | Charles Robert Darwin |
Date: | 13 Feb 1866 |
Classmark: | Möller ed. 1915–21, 2: 79–80 |
Letter no: | DCP-LETT-5004A |
From Fritz Müller 6 March 1866
Summary
Thanks CD for German translation of Origin.
Droughts over the summers have brought about changes in the numbers of plants and animals in the area. The small quantity of Orchestia darwinii that has survived the changes no longer includes two previously common male forms. Great changes also take place without such unusual physical conditions. The disappearance of a briefly abundant bryozoan in local caves has made way not for the return of original bryozoan inhabitants but for a completely new fauna.
Author: | Johann Friedrich Theodor (Fritz) Müller |
Addressee: | Charles Robert Darwin |
Date: | 6 Mar 1866 |
Classmark: | Möller ed. 1915–21, 2: 80–2 |
Letter no: | DCP-LETT-5027A |
From Fritz Müller 2 August 1866
Summary
Gives some observations on orchids and on some plants which seem to be dichogamous.
Author: | Johann Friedrich Theodor (Fritz) Müller |
Addressee: | Charles Robert Darwin |
Date: | 2 Aug 1866 |
Classmark: | DAR 76: B33, 33a; DAR 157a: 81, 102; DAR 142: 38 |
Letter no: | DCP-LETT-5173 |
From Fritz Müller 1 and 3 October 1866
Summary
Discusses dimorphism of Oxalis; one form has 99% sterile anthers. Has found three kinds of fertile anthers.
Author: | Johann Friedrich Theodor (Fritz) Müller |
Addressee: | Charles Robert Darwin |
Date: | 1 and 3 Oct 1866 |
Classmark: | DAR 142: 99; DAR 157a: 103 |
Letter no: | DCP-LETT-5226 |
From Fritz Müller [2 November 1866]
Summary
Sends his observations on sterility of Eschscholzia,
on Oxalis,
and on recently found dimorphic plants.
Sends specimen of Hedyotis [see Forms of flowers, p. 133].
Author: | Johann Friedrich Theodor (Fritz) Müller |
Addressee: | Charles Robert Darwin |
Date: | [2 Nov 1866] |
Classmark: | DAR 111: B59, DAR 142: 100, 101, 105, Möller ed. 1915–21, 2: 93–4 |
Letter no: | DCP-LETT-5264 |
From Fritz Müller 1 December 1866
Summary
Gives observations on orchid ovules ripening long after blooming.
Infertility with own pollen sometimes does and sometimes does not indicate dimorphism; gives observations on Ximenia, Eschscholtzia and Oncidium flexuosum.
Describes some striking seeds eaten by birds,
and some new dimorphic species.
Variation in Thillia.
Confirms CD’s suspicion that the lancet-fish [Amphioxus] lives in competition with invertebrates: it shares its habitat with a similar-looking Ophelia, which is quite unlike other annelids, just as the lancet-fish is unlike other fishes.
Author: | Johann Friedrich Theodor (Fritz) Müller |
Addressee: | Charles Robert Darwin |
Date: | 1 Dec 1866 |
Classmark: | Möller ed. 1915–21, 2: 99–102. |
Letter no: | DCP-LETT-5292A |