The Complete Work of Charles Darwin Online

RECORD: Darwin, C. R. 1879.03.06. Dionaea. CUL-DAR209.3.171. Edited by John van Wyhe (Darwin Online, http://darwin-online.org.uk/)

REVISION HISTORY: Transcribed by Christine Chua and edited by John van Wyhe 12.2022. RN1

NOTE: See record in the Darwin Online manuscript catalogue, enter its Identifier here. Reproduced with permission of the Syndics of Cambridge University Library and William Huxley Darwin. The volume CUL-DAR209.3 contains materials for Darwin's book Movement in plants (1880).

[171]

March 6th 79. The same old leaf with filament to spike ─ The spikes are now erected & even in margin of leaf a little opened ─ for long pins point of glass motionless & then moved very greatly backwards & forwards a lot 1/1000 of inch ─ & only once or twice saw a start. Ev note 2/3 inch object glass removal cd. hardly be called jerks ─ But when leaf was warned by a taper movement became distinctly jerky & exactly like formerly.

(I certainly think that energy formed during the chemico-vital changes, going on in the plants are converted into movement.)

(Dionæa)

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