RECORD: Darwin, C. R. 1878.06.11-13. Oxalis Plumieri. CUL-DAR209.14.90. (John van Wyhe ed., 2002-. The Complete Work of Charles 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).
[90]
June 11 to morning of 13th 1878
Oxalis Plumieri
Circumnutation of terminal leaflet.
Leaf consist of 2 lateral & a terminal leaflet, with rather long petiole, which was secured to stick close to base of the 3 leaflets. [sketch]
Observed under skylight. Temp 15 1/2 to 16 1/2 C. Tip of leaflet 6 3/4 from vertical glass. Movement quite simple. up & down during whole 24º day —
At night vertically down & cannot be traced. Rise rapidly in morning, then moves very slowly, in midday moves moves a little laterally, but up & down lines do not coincide.— & about 5º P.m. begin to sink rapidly, so as to be abo almost perpendicularly down at about 7º or 8º P.m.— Has risen considerably abo by about 8º a.m.
Citation: John van Wyhe, ed. 2002-. The Complete Work of Charles Darwin Online. (http://darwin-online.org.uk/)
File last updated 17 August, 2023