RECORD: Darwin, C. R. 1878.03.16-17. Vegetable marrow apogeotropism / Draft of Cross and self fertilisation, folio 56. CUL-DAR209.11.41. 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-DAR209.11 contains material for Darwin's book Movement in plants (1880). Draft in the hand of Ebenezer Norman with corrections by Darwin. The text of the draft corresponds to Cross and self fertilisation, pp. 32-33.
[41]
Vegetable marrow apogeotropism
March 16-17 1878.
[Figure]
[42]
56
Ipomoea
fertilised plants produced spontaneously (excluding besides the 23 artificially self-fertilised pods) only 29 self-fertilised capsules, containing on an average 4.14 seeds. Therefore the average number of seeds in the two pots of lots of spontaneously self-fertilised capsules was as 100 to 94. Thus the Taking into consideration the number of capsules together with the average number of seeds, the crossed plants spontaneously self-fertilised produced seeds in comparison with the self-fertilised plants spontaneously self-fertilised in the proportion of 100 to 35. By whatever method the fertility of these plants is tried compared, the crossed are more fertile than the self-fertilised plants.
I tried in several ways the comparative [text excised]
Citation: John van Wyhe, ed. 2002-. The Complete Work of Charles Darwin Online. (http://darwin-online.org.uk/)
File last updated 19 August, 2023