RECORD: Darwin, C. R. & Emma Darwin. 1864.03.19-04.05. Maurandia Barclayan. CUL-DAR157.1.96. 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.
[96]
Mar. 1864
Maurandia Barclayan (Scrophulariaceæ)
Young leaves sensitive to a touch & very slowly move. I think a trace of movement in 45'. Certainly some in 3°— slowly recover their old position. Leaves slightly lobed posteriorly at right angles to peduncle. Plant with numerous shoots upright with tips slightly bowed over. On 19th one moved opposite to sun. Next day same shoot moved with sun in long & broad oval course, & made 2 circuits in exactly 6° 34'. i.e. each in nearly the same time viz. 3°. 17'—
[96v]
The plant climbs beautifully round thick branched twigs, peduncle taking full turns the twigs.
April 5
5 inches of string (.82 gr) causes peduncle to twist.
10 inches of thread (.25 gr) sometimes, but not always, caused movement—
5 inches of thread [illeg] (.125 gr) caused movement
Citation: John van Wyhe, ed. 2002-. The Complete Work of Charles Darwin Online. (http://darwin-online.org.uk/)
File last updated 19 July, 2023