RECORD: Darwin, C. R. [ny].03.18-03.20. Rubus (Hybrid) / Draft of Cross and self fertilisation (fragment) & folio 68. CUL-DAR209.11.107-108. 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, p. 38.
[107]
Pots laid on one side March 18
Rubus (Hybrid)
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[107v]
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a height of between one and two feet they were all, or almost all, shorter than their self-fertilised opponents, but were not then measured. When they had acquired an average height of 32.28 inches, that of the self-fertilised plants was 40.68, or as 100 to 122.
[108]
Rubus March 20th
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[108v]
68
Ipomoea
nothing can be said on their relative fertility.
Crossed and self-fertilised plants of the eighth generation.— (Ipomoea purpurea) Asjust stated the plants of the last generation, from which the present ones were raised, were very unhealthy, and their seeds of unusually small size; and this probably accounts for the two lots behaving differently from what they did in any of the previous or succeeding generations, heretofore.
Many of the self-fertilised seeds germinated before the crossed ones, and these were of course rejected
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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 20 August, 2023