RECORD: Darwin, C. R. 1878.06.11-13. Oxalis Valdiviana / Draft of Cross and self fertilisation.CUL-DAR209.14.98. 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). Draft is in the hand of Ebenezer Norman with corrections by Darwin. The text of the draft corresponds to Cross and self fertilisation, p. 379.


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Ox. Valdiviana

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a laughable idea that pollen should be brought from flowers of the same species, none of which grew nearer than between 500 and 600 yards.*(b) The result was that 289 of these 520 flowers yielded no seed, or seed that did not germinate; the seed of 29 flowers produced hybrids, such as might have been expected from the nature of the pollen employed; and lastly, the seed of the remaining 202 flowers produced perfectly pure plants, so that these flowers must have been fertilised by pollen brought by insects from a distance of between 500 and 600 yards.*(c) It is of course possible that some of these 202 flowers may might have been fertilised by pollen left accidentally in them when they were castrated; but to show


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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 18 August, 2023