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Treat, Mary in correspondent 
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From:
Mary Lua Adelia (Mary) Davis; Mary Lua Adelia (Mary) Treat
To:
Charles Robert Darwin
Date:
20 Dec 1871
Source of text:
DAR 58.1: 33
Summary:

Describes fly-catching activity of Drosera longifolia.

Experiments on Papilio asterias; sex of adult determined by length of larval feeding time.

Contributor:
Darwin Correspondence Project
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From:
Charles Robert Darwin
To:
Mary Lua Adelia (Mary) Davis; Mary Lua Adelia (Mary) Treat
Date:
5 Jan 1872
Source of text:
Amy Nagashima (private collection)
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.

Contributor:
Darwin Correspondence Project
From:
Mary Lua Adelia (Mary) Davis; Mary Lua Adelia (Mary) Treat
To:
Charles Robert Darwin
Date:
13 Dec 1872
Source of text:
DAR 58.1: 23–4
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.

Contributor:
Darwin Correspondence Project
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From:
Charles Robert Darwin
To:
Mary Lua Adelia (Mary) Davis; Mary Lua Adelia (Mary) Treat
Date:
1 Jan 1873
Source of text:
Amy Nagashima (private collection)
Summary:

Asks for certain observations to be made on Drosera and Dionaea.

Contributor:
Darwin Correspondence Project
From:
Mary Lua Adelia (Mary) Davis; Mary Lua Adelia (Mary) Treat
To:
Charles Robert Darwin
Date:
28 July 1873
Source of text:
DAR 58.1: 30–2
Summary:

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

Contributor:
Darwin Correspondence Project
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From:
Charles Robert Darwin
To:
Mary Lua Adelia (Mary) Davis; Mary Lua Adelia (Mary) Treat
Date:
12 Aug 1873
Source of text:
Vineland Historical and Antiquarian Society
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.

Contributor:
Darwin Correspondence Project
From:
Mary Lua Adelia (Mary) Davis; Mary Lua Adelia (Mary) Treat
To:
Charles Robert Darwin
Date:
8 June 1874
Source of text:
DAR 58.1: 58–9
Summary:

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

Contributor:
Darwin Correspondence Project
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From:
Charles Robert Darwin
To:
Mary Lua Adelia (Mary) Davis; Mary Lua Adelia (Mary) Treat
Date:
22 June 1874
Source of text:
Amy Nagashima (private collection)
Summary:

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

Contributor:
Darwin Correspondence Project
From:
Mary Lua Adelia (Mary) Davis; Mary Lua Adelia (Mary) Treat
To:
Charles Robert Darwin
Date:
22 Oct 1874
Source of text:
DAR 58.1: 108
Summary:

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

Contributor:
Darwin Correspondence Project
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From:
Mary Lua Adelia (Mary) Davis; Mary Lua Adelia (Mary) Treat
To:
Charles Robert Darwin
Date:
2 Dec 1874
Source of text:
DAR 58.1: 109–10
Summary:

Observations on the insects captured by Utricularia.

Contributor:
Darwin Correspondence Project
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From:
Mary Lua Adelia (Mary) Davis; Mary Lua Adelia (Mary) Treat
To:
Charles Robert Darwin
Date:
11 Feb 1875
Source of text:
DAR 178: 177
Summary:

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

Contributor:
Darwin Correspondence Project
From:
Mary Lua Adelia (Mary) Davis; Mary Lua Adelia (Mary) Treat
To:
Charles Robert Darwin
Date:
3 Apr 1876
Source of text:
DAR 178: 178
Summary:

Encloses Pinguicula specimens.

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

Contributor:
Darwin Correspondence Project
From:
Charles Robert Darwin
To:
Mary Lua Adelia (Mary) Davis; Mary Lua Adelia (Mary) Treat
Date:
21 Apr [1876]
Source of text:
Vineland Historical and Antiquarian Society
Summary:

Congratulations on finding water-lily.

Thanks for Pinguicula specimens.

Asks for reference to her article on Utricularia [see 10508].

Contributor:
Darwin Correspondence Project
From:
Mary Lua Adelia (Mary) Davis; Mary Lua Adelia (Mary) Treat
To:
Charles Robert Darwin
Date:
15 May 1876
Source of text:
DAR 178: 179
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].

Contributor:
Darwin Correspondence Project
From:
Charles Robert Darwin
To:
Mary Lua Adelia (Mary) Davis; Mary Lua Adelia (Mary) Treat
Date:
1 June 1876
Source of text:
Amy Nagashima (private collection)
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.

Contributor:
Darwin Correspondence Project