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From Mary Treat   3 April 1876

Summary

Encloses Pinguicula specimens.

Believes she has found a new species of water-lily.

Author:  Mary Lua Adelia (Mary) Treat
Addressee:  Charles Robert Darwin
Date:  3 Apr 1876
Classmark:  DAR 178: 178
Letter no:  DCP-LETT-10439

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) Treat
Date:  21 Apr [1876]
Classmark:  Vineland Historical and Antiquarian Society
Letter no:  DCP-LETT-10464

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) Treat
Addressee:  Charles Robert Darwin
Date:  15 May 1876
Classmark:  DAR 178: 179
Letter no:  DCP-LETT-10508

To Mary Treat   1 June 1876

Summary

Thanks MT for her article ["Is the valve of Utricularia sensitive?", Harper’s New Mon. Mag. 52 (1875): 382–7]. Does not understand why he failed to detect movement [in Utricularia], but it appears from her observations that the valve is sensitive.

Author:  Charles Robert Darwin
Addressee:  Mary Lua Adelia (Mary) Treat
Date:  1 June 1876
Classmark:  Amy Nagashima (private collection)
Letter no:  DCP-LETT-10523

From Mary Treat   20 December 1871

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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) Treat
Addressee:  Charles Robert Darwin
Date:  20 Dec 1871
Classmark:  DAR 58.1: 33
Letter no:  DCP-LETT-8113

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) Treat
Date:  5 Jan 1872
Classmark:  Amy Nagashima (private collection)
Letter no:  DCP-LETT-8146

From Mary Treat   13 December 1872

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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) Treat
Addressee:  Charles Robert Darwin
Date:  13 Dec 1872
Classmark:  DAR 58.1: 23–4
Letter no:  DCP-LETT-8676

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) Treat
Date:  1 Jan 1873
Classmark:  Amy Nagashima (private collection)
Letter no:  DCP-LETT-8719

From Mary Treat   28 July 1873

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Summary

Reports in detail on her experiments with Drosera. Finds she was mistaken in thinking D. filiformis captured only small insects.

Author:  Mary Lua Adelia (Mary) Treat
Addressee:  Charles Robert Darwin
Date:  28 July 1873
Classmark:  DAR 58.1: 30–2
Letter no:  DCP-LETT-8989

To Mary Treat   12 August 1873

Summary

Thanks MT for information on Drosera filiformis [see 8989].

Warns her against publishing statement about Drosera bending towards flies or meat that they have not touched.

Will send his book [Insectivorous plants] when published.

Author:  Charles Robert Darwin
Addressee:  Mary Lua Adelia (Mary) Treat
Date:  12 Aug 1873
Classmark:  Vineland Historical and Antiquarian Society
Letter no:  DCP-LETT-9005B

From Mary Treat   8 June 1874

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Summary

Sends her observations on Dionaea capturing insects. [See Insectivorous plants, pp. 311–12.]

Author:  Mary Lua Adelia (Mary) Treat
Addressee:  Charles Robert Darwin
Date:  8 June 1874
Classmark:  DAR 58.1: 58–9
Letter no:  DCP-LETT-9485

To Mary Treat   22 June 1874

Summary

Will soon publish on insectivorous plants; asks for a particular observation on Dionaea.

Author:  Charles Robert Darwin
Addressee:  Mary Lua Adelia (Mary) Treat
Date:  22 June 1874
Classmark:  Amy Nagashima (private collection)
Letter no:  DCP-LETT-9505

From Mary Treat   22 October 1874

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Summary

Observation on the limitations on the power of digestion in Dionaea.

Author:  Mary Lua Adelia (Mary) Treat
Addressee:  Charles Robert Darwin
Date:  22 Oct 1874
Classmark:  DAR 58.1: 108
Letter no:  DCP-LETT-9692

From Mary Treat   2 December 1874

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Summary

Observations on the insects captured by Utricularia.

Author:  Mary Lua Adelia (Mary) Treat
Addressee:  Charles Robert Darwin
Date:  2 Dec 1874
Classmark:  DAR 58.1: 109–10
Letter no:  DCP-LETT-9740

From Mary Treat   11 February 1875

Summary

Structure of Utricularia; its resemblance to an animal vascular system.

Author:  Mary Lua Adelia (Mary) Treat
Addressee:  Charles Robert Darwin
Date:  11 Feb 1875
Classmark:  DAR 178: 177
Letter no:  DCP-LETT-9853
Document type
letter (15)
Author
Addressee
Correspondent
Date
1871 (1)
1872 (2)
1873 (3)
1874 (4)
1875 (1)
1876 (4)
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