RECORD: Darwin, C. R. 1875.10.20. Abstract / Fertility – Ipomœa / Proof sheet of Insectivorous plants, p. 84, published p. 156. CUL-DAR77.46. Edited by John van Wyhe (Darwin Online, http://darwin-online.org.uk/)
REVISION HISTORY: Transcribed by Christine Chua and edited by John van Wyhe 2.2023. 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 volumes CUL-DAR 76-79 contain material for Darwin's book Cross and self fertilisation (1876).
[46]
Oct 20' 1875 Abstract
Fertility— Ipomœa
p. 45— plants of 1st. gen. — crossed plants average 5.23 seeds per Cross.
60 pods of self-fert. 4.84 seeds 4.85
p 46 do. gen. Crowded plants— crossed 3.62 self 3.38
p 49 3d. gen. —26 pods crossed 4.73 seeds
23 pods self 4.43 seeds
― do gen crossed plants spont self-fert 77 pods — 4.41. seeds
self-fert plants spont self fert. 29 pods. — 4.14 seeds
p. 53 4th gen.
crossed plants crossed by distinct plant 28 pods. — 4.75
self- plants self-fert. 27 pods. — 4.47
(I do not think of any more use)
p. 55. 5th gen.
crossed plant. spont. fert? — 3.37
self- plants. do — 3.00
crossed plants again crossed. — 4.46!
self-fert-plant again self fert — 4.77!
p. 66. Cross of distinct flowers on same plant. 29 pods — 4.86
― self-fertilised plants 26 pods — 4.42
p. 79 grandchildren of hom self-fert. 16 pods 5.2
great-grandchildren of hom — self-fr 21 pods 4.47
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[Proof sheet of Insectivorous plants, p. 84, published p. 156.]
Citation: John van Wyhe, ed. 2002-. The Complete Work of Charles Darwin Online. (http://darwin-online.org.uk/)
File last updated 28 May, 2023