The Complete Work of Charles Darwin Online

RECORD: Darwin, C. R. 1878.06.18-20. Dahlia / Draft of Cross and self fertilisation. CUL-DAR209.3.142-143. Edited by John van Wyhe (Darwin Online, http://darwin-online.org.uk/)

REVISION HISTORY: Transcribed by Christine Chua and edited by John van Wyhe 12.2022. 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 volume CUL-DAR209.3 contains materials 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 pp. 376 and 377.

[142]

Dahlia 18th June

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Hist.─ Vol VII. 1842, p 108.) The editor of the Botanical Register counted the ovules in the flowers of Wisteria sinensis, and carefully estimated the number of pollen-grains, and he found that for each ovule there were 7000 grains* (*Quoted in Gard. Chron. 1846, p. 771).

With Mirabilis

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Dahlia

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might easily have been converted into closed ones. The graduated steps by which this process could have been effected may be seen at the present time in Lathyrus nissolia and Biophytum sensitivum. The answer to ~~our~~ the above question obviously is that with permanently closed flowers there

Citation: John van Wyhe, ed. 2002-. The Complete Work of Charles Darwin Online. (http://darwin-online.org.uk/)