RECORD: Darwin, C. R. [1878].09.16. Apios graveolens. CUL-DAR209.7.32. Edited by John van Wyhe (Darwin Online, http://darwin-online.org.uk/)
REVISION HISTORY: Transcribed by Christine Chua and edited by John van Wyhe 8.2022. 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 volumes CUL-DAR209.7-8 contain notes on heliotropism (phototropism) for Darwin's book Movement in plants (1880).
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Apios graveolens heliotropic movement, & circumnutation of the of hypocotyls of two seedling towards a dim lateral light, traced on horizontal glass. The broken line shows the return nocturnal course. Height of hypocotyl in A .5 of & in B .55 of inch. Figures as here given reduced to half 1/2 of original scale scale. Sept. 16
[Movement in plants, p. 424: "Apios graveolens: heliotropic movement and circumnutation of the hypocotyls of two seedlings towards a dim lateral light, traced on a horizontal glass during the day. The broken lines show their return nocturnal courses. Height of hypocotyl of A .5, and of B .55 inch. Figure reduced to one-half of original scale."]
Citation: John van Wyhe, ed. 2002-. The Complete Work of Charles Darwin Online. (http://darwin-online.org.uk/)
File last updated 25 September, 2022