RECORD: Darwin, C. R. (Francis Darwin) 26 October. Helianthus annuus. CUL-DAR209.4.171. Edited by John van Wyhe (Darwin Online, http://darwin-online.org.uk/)
REVISION HISTORY: Transcribed and edited by John van Wyhe 6.2025. RN1
NOTE: Reproduced with permission of the Syndics of Cambridge University Library and William Huxley Darwin. The volume CUL-DAR209.4 contains for Darwin's book Movement in plants (1880).
171
Helianthus annuus
Oct 26. Hot house
One cotyledon pinned to cork a glass filament gummed to the other & observed by forshortening on a vertical glass. Plant darkened by a cylinder of brown paper with a white paper top.
Note next morning the gum was loose & wet.
Citation: John van Wyhe, ed. 2002-. The Complete Work of Charles Darwin Online. (http://darwin-online.org.uk/)
File last updated 16 June, 2025