RECORD: Darwin, C. R. 1873. Ipomaea -- crossed means by pollen of distinct flower. CUL-DAR77.43. (John van Wyhe ed., 2002-. The Complete Work of Charles Darwin Online, http://darwin-online.org.uk/)
REVISION HISTORY: Prepared and edited by John van Wyhe. 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).
[43]
1873 Ipomaea— Crossed means by pollen of distinct flower on same plant & self- means pollen of same flower.
Pot |
Crossed |
Self |
Pot |
Crossed |
Self |
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10 |
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From last autumn paper & many this Feb |
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11 |
X 67 |
84 4/8 |
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89 |
90 |
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12 |
X 73 2/8 |
77 4/8 |
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83 4/8 |
87 2/8 |
} From semi-sterile Plant (100 : 108)→ 312. 6/8 || 339 2/8 |
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} seeds sown crowded 4 tallest on each side measured |
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271 6/8 |
264.0 |
Total of crowded |
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312 6/8 |
339 2/ |
Total of semi sterile plants |
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584 4/8 |
603 2/ |
Total of crowded & semi sterile Plants |
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(Red cross means first flower in pot—) |
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2002 4/8 [÷] 27 [=] 74.16 |
2135 4/8 [÷ 27 =] 79.10 |
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2002 4/8 [+] 271 6/8 [=] 2274 2/8 [÷] 31 [=] 73.35 |
2135 6/8 [+] 264 [=] 2399 6/8 [÷ 31 =] 77.41 |
} This is fairest result, including 4 crowded plants = 100 crossed to 105.5 self-fert. |
Citation: John van Wyhe, ed. 2002-. The Complete Work of Charles Darwin Online. (http://darwin-online.org.uk/)
File last updated 9 February, 2026