RECORD: Darwin, C. R. [1864].01.17-03.02. Tropaeolum - Mr Wood?? CUL-DAR157.1.93. 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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Jan 17th — Tropæolum tuberosum— Mr Woods??
9 inches high — no movement of axis & long peduncles of leaves not sensitive— plant at present upright & stiff—
Feb. 21 Now 2 feet high & lopping over; in vain endeavoured to prove sensitiveness— yet today a leaf near apex only 1/4 of inch in long-diameter & ∴ 1/10 of full-sized leaves caught a stick & wound all round it.
Feb 22d. Some leaves of younger plants, even about 1/4 of full size have partly moved in 18° & clasped sticks. —
A very young leaf, only in .15 in diameter in diameter, moved quite sensibly in 1°. 15'—Say 1/20 of full-sized leaf ie. 12 1/2 in diameter.— The stick was
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removed from the young leaves, & the peduncles did not get straight in 5°; but in 24° did get straight: — The youngest leaves which had made complete ¤ round stick & grasped it wonderfully, never got straight again.— (The straight upright axis moves slowly & very irregularly, sometime during whole day in straight line, in different direction, sometime in crooked circles —
The movement above 1 to 1 1/2 inch from extreme points — always on movement. Plant about 1 foot high.
March 2d moves much slower today a minute spire, or attempt at circle in 4° — then stood almost still for some hours.—
Citation: John van Wyhe, ed. 2002-. The Complete Work of Charles Darwin Online. (http://darwin-online.org.uk/)
File last updated 19 July, 2023