RECORD: Darwin, C. R. & Emma Darwin. [1864].04.20-23. In the Lonicera brachypoda. CUL-DAR157.1.3. Edited by John van Wyhe (Darwin Online, http://darwin-online.org.uk/)

REVISION HISTORY: Transcribed by Christine Chua and edited by John van Wyhe 4.2023. RN1

NOTE: See record in the Darwin Online manuscript catalogue, enter its Identifier here.

The volumes CUL-DAR157.1-2 contain notes, abstracts etc. for Darwin's long paper and later book Climbing plants (1865). It was also commercially available as a softbound offprint, F834, F834a. See R. B. Freeman's bibliographical introduction. Items CUL-DAR157.1.11-60 were in a folder marked "Twiners". Items CUL-DAR157.1.61-112 were in a folder marked "Leaf-climbers" and items CUL-DAR157.1.114-147 were in a folder marked "Tendrils". Reproduced with permission of the Syndics of Cambridge University Library and William Huxley Darwin.


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Ap. 20 F

In the Lonicera Brachypoda the shoot at tip was quite hooked, but during the revolutions became straight & the black line which had been on the convex surface became lateral, but I never saw the black line become concave. I saw this hooking & unhooking several times during the last 2 or 3 days.

Ap. 20 Hop. Black line painted on upper surface of revolving upper shoots, often became straight, lateral & slightly concave shewing certainly that all these internodes have independent movement.

The Convolvulus a shoot moved during at least 32°.—

A stick placed to intercept it, the shoot did not rise or move back from stick, like Ceropegia, but terminal portion with inclination which it possessed, very strong wound round the stick it; & when stick removed shoot became straight.

[3v]

Cutting off tips of shoot of Convolvulus did not stop revolutions.

(G

When obstacle was removed, the shoot bounded onwards, which showed that force continued to act in same direction.— I strongly suspect that terminal internodes in all cases move slower than basal ones.—

April 23d. The Malvern Convolvulus had long shoots swinging, I tied them up leaving tip in one case 1 1/4 inch & in other nearly 2 inches long. These tips slowly revolved one in in about 11° & the other in about 12°. They became much curled, & this seemed due to ends of young internodes moving more than [text excised].


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Citation: John van Wyhe, ed. 2002-. The Complete Work of Charles Darwin Online. (http://darwin-online.org.uk/)

File last updated 18 July, 2023