From Mary Treat 13 December 1872
Summary
Drosera filiformis captures only small insects [but see 8989].
Writes of her experiments with butterflies.
CD’s theory steadily gains ground in the U. S., despite Agassiz.
| Author: | Mary Lua Adelia (Mary) Davis; Mary Lua Adelia (Mary) Treat |
| Addressee: | Charles Robert Darwin |
| Date: | 13 Dec 1872 |
| Classmark: | DAR 58.1: 23–4 |
| Letter no: | DCP-LETT-8676 |
Matches: 3 hits
- … For CD’s discovery, see the letter to Asa Gray, 22 October 1872 , and the letter from Asa …
- … Asa Gray had told CD that he would ask William Marriott Canby to make observations on Drosera filiformis , the thread-leaved sundew (see letter …
- … Asa Gray, 2 December 1872 and n. 5). Treat’s article ‘Controlling sex in butterflies’ ( Treat 1873 ) was published in March 1873. She concluded from her experiments that the sex of butterflies was not determined in the egg but by how much nourishment the larvae received, females being produced when food was plentiful and males when it was scarce. See also Correspondence vol. 19, letter …
To Mary Treat 21 April [1876]
Summary
Congratulations on finding water-lily.
Thanks for Pinguicula specimens.
Asks for reference to her article on Utricularia [see 10508].
| Author: | Charles Robert Darwin |
| Addressee: | Mary Lua Adelia (Mary) Davis; Mary Lua Adelia (Mary) Treat |
| Date: | 21 Apr [1876] |
| Classmark: | Vineland Historical and Antiquarian Society |
| Letter no: | DCP-LETT-10464 |
To Mary Treat 1 January 1873
Summary
Asks for certain observations to be made on Drosera and Dionaea.
| Author: | Charles Robert Darwin |
| Addressee: | Mary Lua Adelia (Mary) Davis; Mary Lua Adelia (Mary) Treat |
| Date: | 1 Jan 1873 |
| Classmark: | Amy Nagashima (private collection) |
| Letter no: | DCP-LETT-8719 |
From Mary Treat 15 May 1876
Summary
Sends her article on Utricularia ["Is the valve of Utricularia sensitive?", Harper’s New Mon. Mag. 52 (1875): 382–7].
Proposes to write on Sarracenia ["Carnivorous plants of Florida", Harper’s New Mon. Mag. 53 (1876): 546–8, 710–14].
| Author: | Mary Lua Adelia (Mary) Davis; Mary Lua Adelia (Mary) Treat |
| Addressee: | Charles Robert Darwin |
| Date: | 15 May 1876 |
| Classmark: | DAR 178: 179 |
| Letter no: | DCP-LETT-10508 |
Matches: 1 hit
- … Asa Gray also verified the holotype of Nymphaea lutea Treat (later found to be the same as N. flava , a synonym of N. mexicana ); it is in the Gray Herbarium at Harvard, and is made up of specimens collected by Treat ( Global plants , plants.jstor.org/stable/10.5555/al.ap.specimen.gh00263250 (accessed 20 April 2015)). See letter …
To Mary Treat 5 January 1872
Summary
Praises MT’s observations and asks her to repeat experiments on the the relation of sexes of butterflies to the nutrition of the larvae.
Is glad she will publish her observations on Drosera.
| Author: | Charles Robert Darwin |
| Addressee: | Mary Lua Adelia (Mary) Davis; Mary Lua Adelia (Mary) Treat |
| Date: | 5 Jan 1872 |
| Classmark: | Amy Nagashima (private collection) |
| Letter no: | DCP-LETT-8146 |
From Mary Treat 20 December 1871
Summary
Describes fly-catching activity of Drosera longifolia.
Experiments on Papilio asterias; sex of adult determined by length of larval feeding time.
| Author: | Mary Lua Adelia (Mary) Davis; Mary Lua Adelia (Mary) Treat |
| Addressee: | Charles Robert Darwin |
| Date: | 20 Dec 1871 |
| Classmark: | DAR 58.1: 33 |
| Letter no: | DCP-LETT-8113 |
Matches: 1 hit
- … letter to Oliver of 27 [September 1860] , CD had noted that in Drosera longifolia , the incurvation was ‘always terminal’ (that is, beginning from the apex of the leaf). In Insectivorous plants , p. 278, CD cited Treat’s observations on D. longifolia from her paper, ‘Observations on the sundew’ ( Treat 1873b ); CD referred to the species by its modern name, D. anglica . Asa Gray’ …
| letter | (6) |
| Darwin, C. R. | (3) |
| Davis, Mary | (3) |
| Treat, Mary | (3) |
| Darwin, C. R. | (3) |
| Davis, Mary | (3) |
| Treat, Mary | (3) |
Darwin in Conversation exhibition
Summary
Meet Charles Darwin as you have never met him before. Come to our exhibition at Cambridge University Library, running from 9 July to 3 December 2022, and discover a fascinating series of interwoven conversations with Darwin's many hundreds of…
Matches: 1 hits
- … 9 July – 3 December 2022 Milstein Exhibition Centre, Cambridge University …
