RECORD: Darwin, C. R. 1864. Covered up in open net a large branch of radish. CUL-DAR76.B46. (John van Wyhe ed., 2002-. The Complete Work of Charles Darwin Online, http://darwin-online.org.uk/)
REVISION HISTORY: Transcribed by Christine Chua and edited by John van Wyhe 12.2022. RN2
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]
Autumn 1864. Covered up in open net a large branch of radish, it became covered with fine pods, quite as much as rest of plant— then I collected 20 pods by chance & all these contained some seed except 1 pod.— the average seed of whole 20 was only 1.85 seed per pod— 20 pods, which had not been covered & were visited by insects som all contained seed, & average seed per pod was 3.50.
(& in Godron Duhamel says vars cross
1.85 [x] 2 [=] 3.70 (over)
[46v]
Radishes
Open |
Under Net |
5 [+] 3. [+] 3. [+] 2. [+] 3. [+] 5 [+] 2. [+] 4 [+] 7 [+] 5 [+] 4 3 [+] 2. [+] 2. [+] 4 [+] 3 [+] 2 [+] 3 [+] 4 [+] 3 [+] 4 |
1. [+] 1 [+] 0 [+] 2 [+] 2 [+] 2 [+] 1 [+] 3 [+] 1 [+] 5 [+] 1 [+] 1 [+] 3 [+] 2. [+] 1 [+] 1 [+] 3 [+] 3 [+] 3 [+] 1 |
(not one pod with 1 seed) |
(Nine pods with only 1 seed!) |
[=] 70 [÷] 20 [=] 3.50 per pod |
[=] 37 [÷] 20 [=] 1.85 averge |
(over)
Citation: John van Wyhe, ed. 2002-. The Complete Work of Charles Darwin Online. (http://darwin-online.org.uk/)
File last updated 10 December, 2025