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Darwin Correspondence Project

To W. T. Thiselton Dyer   23 November [1880]

The transcript of this letter is not yet available online.

Summary

WTT-D’s suggestion about absorbent function of pegs in Abronia suggests origin of pegs in Welwitschia, which deeply interests CD. Previously could not see how pegs became large enough to be of mechanical use. Now thinks tissue between hypocotyl and radicle absorbs fluid, which would favour rise of peg to expose larger surface.

Rejects German contempt for investigating use of organs.

Asks WTT-D to observe how worms draw Robinia leaves into burrows.

Summary

WTT-D’s suggestion about absorbent function of pegs in Abronia suggests origin of pegs in Welwitschia, which deeply interests CD. Previously could not see how pegs became large enough to be of mechanical use. Now thinks tissue between hypocotyl and radicle absorbs fluid, which would favour rise of peg to expose larger surface.

Rejects German contempt for investigating use of organs.

Asks WTT-D to observe how worms draw Robinia leaves into burrows.

Letter details

Letter no.
DCP-LETT-12843
From
Darwin, C. R.
To
Thiselton-Dyer, W. T.
Sent from
Down
Source of text
Royal Botanic Gardens, Kew
Physical description
5pp

Please cite as

Darwin Correspondence Project, “Letter no. 12843,” accessed on 5 December 2016, http://www.darwinproject.ac.uk/DCP-LETT-12843

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