RECORD: Darwin, C. R. 1878.03.11. Euphorbia jacquiniflora. CUL-DAR209.14.22. Edited by John van Wyhe (Darwin Online, http://darwin-online.org.uk/)

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).


[22]

Mar 11— 1878 Euphorbia jacquiniflora (Lynch) facts & drawing a young plant not very h vigorous about 11 high at midday 2 uppermost leaves (not including [illeg] bud-like leaves) not nearly fully expanded grown grow grown were considerably dependent— The 3d leaf stood alm 30° degree beneath horizon with — The 4th, 5th, & 6th &c leaves stood horizontally with there petioles slightly bowed.—

At 10° P.m The three uppermost leaves depended vertically with the petioles much more bowed than during day, so that the blade of 3d leaf had moved down down through 60°. The 4th & 5th leaves had each fallen 38° degrees—

Whereas the 6th & the lower & much older leaves had not fallen at all there cd be no doubt that the younger leaves go to sleep & appearance of plant widely different to what it was during day. The changed position of blade of leaves Oldest is due to the downward downwards bowing of the young petioles.—

Both surfaces of leaves silvery under water.— Bloom?


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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 17 August, 2023