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DCP-LETT-12996

From:
Johann Friedrich Theodor (Fritz) Müller
To:
Charles Robert Darwin
Date:
9 Jan 1881
Source of text:
DAR 99: 217–20
Summary:

Thanks for CD’s offer of assistance after flood damage.

Comments on Movement in plants. Discusses sleep movements and paraheliotropism of Maranta and other plants.

Describes the fertilisation of figs by Hymenoptera.

Contributor:
Darwin Correspondence Project
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DCP-LETT-13318

From:
Johann Friedrich Theodor (Fritz) Müller
To:
Charles Robert Darwin
Date:
6, 7 and 9 Sept 1881
Source of text:
DAR 171: 287
Summary:

Discusses some of his observations on the sleep movement in plants. Has been studying the leaflets of Crotalaria; has discovered they move to face the setting sun.

Contributor:
Darwin Correspondence Project

DCP-LETT-13593

From:
Johann Friedrich Theodor (Fritz) Müller
To:
Charles Robert Darwin
Date:
1 Jan 1882
Source of text:
DAR 106: C19
Summary:

In answer to CD’s query, FM thinks the seeds he sent were those of the sensitive Mimosa.

Reports his observations of movement of leaves of Bauhinia grandiflora and B. brasiliensis. They do not "sleep" in hot weather.

Sends some seeds of Pontederia he had fertilised.

Contributor:
Darwin Correspondence Project
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