RECORD: Darwin, C. R. 1867. Broom Plant under Net. CUL-DAR76.B63. 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 volumes CUL-DAR 76-79 contain material for Darwin's book Cross and self fertilisation (1876).
[63]
Broom 1867. Plant under Net.
White Th. fert by long stamen of distinct plant 8 flowers. |
Black Th. by pollen of own longer stamens 8 fl. |
Black wool by pollen of both stamens 8 fl. |
Black Thread & wool snapped off 16 fl |
8 9 11 9
|
6 3 1 4 5 |
2 2
|
3. 2. 2
7 |
[total] 19/4 [=] 9.2 Large portion These 37 seeds weighed 7.53 gr. These crossed seeds were more numerous than those naturally crossed, no doubt owing to bush having borne so few. |
[total] 19 [calculations not transcribed] 3.3 average These 37 seeds, which were self-fertilised & snapped off at same time as the other flowers were crossed weighed only 6.65 gr. so crossed weighed as 100 to 88 |
[total] 4 |
[total] 14 |
Spontaneously self-fertilised whole large plant produced altogether 93 pods, (besides artificially fertilised) these included 273 seeds, giving average of 2.93 seeds per pod.—
(10 selected from above best pods, spont. self-fert. contained 7 [+] 3 [+] 4 [+] 3 [+] 4 [+] 5 [+] 3 [+] 6 [+] 4 [+] 4 [=] 43. average 4.30 per pod)
This largely used p. 177 text
Citation: John van Wyhe, ed. 2002-. The Complete Work of Charles Darwin Online. (http://darwin-online.org.uk/)
File last updated 1 June, 2023