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 |
To Fritz Müller [late December 1866 and] 1 January 1867
Summary
Thanks for observations on dimorphic plants. Dimorphism prevalent in certain groups throughout the world.
Retarded fertilisation in certain orchids.
Author: | Charles Robert Darwin |
Addressee: | Johann Friedrich Theodor (Fritz) Müller |
Date: | 31 Dec 1866 and 1 Jan 1867 |
Classmark: | The British Library (Loan MS 10 no 11) |
Letter no: | DCP-LETT-5331 |
From Fritz Müller 1 January 1867
Summary
Describes his experiments in fertilising Oncidium flexuosum and comparison with Notylia.
Has been examining Catasetum.
Encloses seeds of two species of Gesneria and describes hairs in the seed capsule. Hairs in other plants seem to have a different function.
Starting tomorrow for a botanical excursion on the Continent.
Author: | Johann Friedrich Theodor (Fritz) Müller |
Addressee: | Charles Robert Darwin |
Date: | 1 Jan 1867 |
Classmark: | Möller ed. 1915–21, 2: 104–9; DAR 157a: 104 |
Letter no: | DCP-LETT-5344A |
From Fritz Müller 2 February 1867
Summary
Thanks for CD’s letter inquiring about capsules produced by the Maxillaria with larger pods [see 5331]. Gives descriptions of Maxillaria and of the other Vandeae.
Describes Oncidium flexuosum.
Tells of botanical results of recent excursion to the German colony Theresopolis. Brought home fine collection of living orchids.
Author: | Johann Friedrich Theodor (Fritz) Müller |
Addressee: | Charles Robert Darwin |
Date: | 2 Feb 1867 |
Classmark: | Möller ed. 1915–21, 2: 109–11; DAR 70: 146 |
Letter no: | DCP-LETT-5389A |
To Fritz Müller 7 February [1867]
Summary
CD’s Variation is in printer’s hands.
Orchid self-sterility.
Author: | Charles Robert Darwin |
Addressee: | Johann Friedrich Theodor (Fritz) Müller |
Date: | 7 Feb [1867] |
Classmark: | The British Library (Loan MS 10 no 12) |
Letter no: | DCP-LETT-5393 |
To Fritz Müller 22 February [1867]
Summary
Observations on orchid self-sterility.
Wants information on characters that may have originated through sexual selection in lower animals.
Encloses queries on expression.
Author: | Charles Robert Darwin |
Addressee: | Johann Friedrich Theodor (Fritz) Müller |
Date: | 22 Feb [1867] |
Classmark: | The British Library (Loan MS 10 no 13) |
Letter no: | DCP-LETT-5410 |
From Fritz Müller 4 March 1867
Summary
Reports observations on fertility of orchids he has self-pollinated and crossed with pollen of other species.
Author: | Johann Friedrich Theodor (Fritz) Müller |
Addressee: | Charles Robert Darwin |
Date: | 4 Mar 1867 |
Classmark: | DAR 142: 102 |
Letter no: | DCP-LETT-5429 |
To Fritz Müller 25 March [1867]
Summary
Thanks for facts on orchids.
Friedrich Hildebrand’s new book on fertilisation of plants [Die Geschlechten-Vertheilung bei den Pflanzen (1867)].
CD correcting proofs of Variation.
FM likes Ernst Haeckel’s book [Generelle Morphologie (1866)].
Author: | Charles Robert Darwin |
Addressee: | Johann Friedrich Theodor (Fritz) Müller |
Date: | 25 Mar [1867] |
Classmark: | The British Library (Loan MS 10 no 14) |
Letter no: | DCP-LETT-5458 |
From Fritz Müller 1 April 1867
Summary
Cites cases of difference in coloration between the sexes of some species of Crustacea, annelids, and spiders.
Discusses dimorphic plants and self-sterility.
Outlines some experiments involving the crossing of different species of orchids.
Encloses extract from Carl Claus, Die freilebenden Copepoden [1863].
Author: | Johann Friedrich Theodor (Fritz) Müller |
Addressee: | Charles Robert Darwin |
Date: | 1 Apr 1867 |
Classmark: | DAR 110: B111–12; DAR 81: 167 |
Letter no: | DCP-LETT-5480 |
To Fritz Müller 22 April [1867]
Summary
Self-sterility in orchids.
Growth differences in plants raised from self- and cross-fertilised seed.
Author: | Charles Robert Darwin |
Addressee: | Johann Friedrich Theodor (Fritz) Müller |
Date: | 22 Apr [1867] |
Classmark: | The British Library (Loan MS 10 no 15) |
Letter no: | DCP-LETT-5509 |
To Fritz Müller 26 May [1867]
Summary
Thanks for information on sexual differences.
Orchids; self-sterility and difficulty of getting seeds to germinate.
Dimorphism.
Author: | Charles Robert Darwin |
Addressee: | Johann Friedrich Theodor (Fritz) Müller |
Date: | 26 May [1867] |
Classmark: | The British Library (Loan MS 10 no 16) |
Letter no: | DCP-LETT-5551 |
From Fritz Müller 2 June 1867
Summary
Discusses dimorphism in plants, especially the Rubiaceae.
Gives observations on orchids; notes varying degrees of self-sterility and a varying success at crossing distinct species.
Mentions local ferns he is collecting
and considers the phenomenon of apparently mimetic plants.
Author: | Johann Friedrich Theodor (Fritz) Müller |
Addressee: | Charles Robert Darwin |
Date: | 2 June 1867 |
Classmark: | DAR 110: B113–14 |
Letter no: | DCP-LETT-5559 |
From Fritz Müller 17 July 1867
Summary
Thanks CD for sending F. H. G. Hildebrand’s book on fertilisation [Die Geschlechter-Vertheilung bei den Pflanzen (1867)]
and J. D. Hooker’s "Lecture on insular floras".
Describes work on Rubiaceae, Oxalis,
and on crossing orchids. Lists crosses made.
As for CD’s query concerning sexual differences among invertebrates, he gives the case of the local amphipod, Brachyscellus diversilor. Male differs in shape of antennae and coloration.
Also mentions local fish in sea near Sta Catharina which emits melodic tone to attract females.
Author: | Johann Friedrich Theodor (Fritz) Müller |
Addressee: | Charles Robert Darwin |
Date: | 17 July 1867 |
Classmark: | Möller ed. 1915–21, 2: 130–1 |
Letter no: | DCP-LETT-5583A |
To Fritz Müller 31 July [1867]
Summary
Has abstracted for insertion in his sterility chapter [Variation 2, ch. 18], FM’s observations of plant’s pollen being poisonous to itself.
Occurrence of mimetic plants.
Colouring of Planariae.
Author: | Charles Robert Darwin |
Addressee: | Johann Friedrich Theodor (Fritz) Müller |
Date: | 31 July [1867] |
Classmark: | The British Library (Loan MS 10 no 17) |
Letter no: | DCP-LETT-5591 |
To Fritz Müller 15 August [1867]
Summary
Queries about expressions in crying monkeys.
Has received letter from Hermann Müller on orchid fertilisation.
Author: | Charles Robert Darwin |
Addressee: | Johann Friedrich Theodor (Fritz) Müller |
Date: | 15 Aug [1867] |
Classmark: | The British Library (Loan MS 10 no 18) |
Letter no: | DCP-LETT-5605 |
From Fritz Müller [8 October 1867]
Summary
Has CD ever considered that the colour of seeds of Amarantaceae would attract the attention of birds?
Describes case of a climbing Chamissoa of the local flora.
Author: | Johann Friedrich Theodor (Fritz) Müller |
Addressee: | Charles Robert Darwin |
Date: | [8 Oct 1867] |
Classmark: | Möller ed. 1915–21, 2: 132 |
Letter no: | DCP-LETT-5620A |
To Fritz Müller 2 November 1867
Summary
Variation to be published at end of month.
Dimorphism and self-sterility.
Seed dissemination in Adenanthera.
Author: | Charles Robert Darwin |
Addressee: | Johann Friedrich Theodor (Fritz) Müller |
Date: | 2 Nov 1867 |
Classmark: | The British Library (Loan MS 10 no 19) |
Letter no: | DCP-LETT-5666 |
To Fritz Müller 30 January [1868]
Summary
Sends Variation and would like to hear what FM thinks of Pangenesis.
Thanks for information on expression.
Dimorphic plants;
differences in seed production in cross- and self-fertilised plants.
Author: | Charles Robert Darwin |
Addressee: | Johann Friedrich Theodor (Fritz) Müller |
Date: | 30 Jan [1868] |
Classmark: | The British Library (Loan MS 10 no 20) |
Letter no: | DCP-LETT-5816 |
To Fritz Müller 11 February 1868
Summary
Is working on sexual selection and is interested in any anomalous sex ratios in lower animals and any sex-related characters.
Author: | Charles Robert Darwin |
Addressee: | Johann Friedrich Theodor (Fritz) Müller |
Date: | 11 Feb 1868 |
Classmark: | The British Library (Loan MS 10 no 21) |
Letter no: | DCP-LETT-5860 |
To Fritz Müller 16 March [1868]
Summary
CD arranging for a translation of FM’s Für Darwin by W. S. Dallas.
Author: | Charles Robert Darwin |
Addressee: | Johann Friedrich Theodor (Fritz) Müller |
Date: | 16 Mar [1868] |
Classmark: | The British Library (Loan MS 10 no 22) |
Letter no: | DCP-LETT-6014 |
letter | (111) |
Darwin, C. R. | (58) |
Müller, Fritz | (53) |
Müller, Fritz | (58) |
Darwin, C. R. | (53) |
Darwin, C. R. | (111) |
Müller, Fritz | (111) |