To G. H. K. Thwaites 30 March [1863]
Summary
Thanks GHKT for specimens of Sethia. Discusses functions of their dimorphism for insect fertilisation.
Discusses polymorphism and fertilisation in Lythraceae.
Asks for seed of Limnanthemum.
Describes his interest in galls.
Discusses curious specimens of Gomphia and Lesemia.
| Author: | Charles Robert Darwin |
| Addressee: | George Henry Kendrick Thwaites |
| Date: | 30 Mar [1863] |
| Classmark: | American Philosophical Society (Mss.B.D25.293) |
| Letter no: | DCP-LETT-4067 |
To G. H. K. Thwaites 29 July [1863]
Summary
Thanks GHKT for Limnanthemum seed.
Comments on his view of algal reproduction.
Discusses flower of Cassia.
Sends photograph of himself.
| Author: | Charles Robert Darwin |
| Addressee: | George Henry Kendrick Thwaites |
| Date: | 29 July [1863] |
| Classmark: | American Philosophical Society (Mss.B.D25.295) |
| Letter no: | DCP-LETT-4256 |
From George Henry Kendrick Thwaites 17 February 1863
Summary
Replies to CD’s letter: dimorphism common in Ceylon Rubiaceae. [See Forms of flowers, p. 286.]
| Author: | George Henry Kendrick Thwaites |
| Addressee: | Charles Robert Darwin |
| Date: | 17 Feb 1863 |
| Classmark: | DAR 109: A94 |
| Letter no: | DCP-LETT-3994 |
From G. H. K. Thwaites 8 June 1863
Summary
Dimorphism in Linum.
Situation in some of the lower Algae is analogous to that in phaenogams. In some, conjugation occurs between separate filaments, in others between cells of same filament.
Forwards a letter from S. O. Glenie enclosing specimens of Cassia fistula which show the two forms of the anthers.
| Author: | George Henry Kendrick Thwaites |
| Addressee: | Charles Robert Darwin |
| Date: | 8 June 1863 |
| Classmark: | DAR 178: 121–2 |
| Letter no: | DCP-LETT-4208 |
From G. H. K. Thwaites 24 September 1863
Summary
Sends information on the flowers of Cassia roxburghii; will send flowers of all the species of Cassia for CD to study with a view to discovering the law which operates to bring about the differences.
| Author: | George Henry Kendrick Thwaites |
| Addressee: | Charles Robert Darwin |
| Date: | 24 Sept 1863 |
| Classmark: | DAR 48: 74 |
| Letter no: | DCP-LETT-4303 |
| Thwaites, G. H. K. | (3) |
| Darwin, C. R. | (2) |
| Darwin, C. R. | (3) |
| Thwaites, G. H. K. | (2) |
