RECORD: Darwin, C. R. 1879.04.24-25. Euphorbia jacquiniflora. CUL-DAR209.14.24. Edited by John van Wyhe (Darwin Online,

REVISION HISTORY: Transcribed by Christine Chua and edited by John van Wyhe 7.2023. 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-DAR209.14 contains material for Darwin's book Movement in plants (1880).


April. 24' 1879. Euphorbia jacquinifolia

day cloudy in N.E. window— The leaves remained much dependent all day & no lateral movement, yet at night sunk still considerably lower,

Ap 25. Placed before S.W. window— day light high clouds some gleams of sun. — leaves did not rise or move laterally. move

It is clear very little Heliotropic & seem to require bright light from above to make then rise

I think weight keeps them down except when light bright above


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Citation: John van Wyhe, ed. 2002-. The Complete Work of Charles Darwin Online. (

File last updated 17 August, 2023