The Complete Work of Charles Darwin Online

RECORD: Darwin, C. R. 1866. Lythrum (no 75) mid-styled plant / very favourable season. CUL-DAR109.B76. 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-DAR108-111 contain material for Darwin's book Forms of flowers (1877).

p. 19A

1866

Lythrum (no 75) mid-styled Plant seed all pollen very favourable season

XX Exposed to Class IV & V to be freely fertilised.

78 [+] 80} many small seed [+] 61 min [+] max 109 [+] 72 [+] 87 [+] 95 [+] 106 [=] 688 [÷] 8 86.0

average of 86.0 seed

normal fert of mid styled 86 : 130 : 86 : : 100 : 66 per cent

Hence this plant produced only 66 per cent of its normal number of seed,

This will be best plan of giving fertility

Plant 82. mid-styled, exposed as above seed all pollen

average 89.0 seed per pod

~~89: 130 : : 100~~ :

130: 89 : : 68 100: 68 per cent ie produced 68 per cent of normal seed.─

104 [+] max. 119 [+] 76 [+] 76 [+] 101 [+] 72 [+] min 69 [+] 95 [=] 712 [÷] 8

Citation: John van Wyhe, ed. 2002-. The Complete Work of Charles Darwin Online. (http://darwin-online.org.uk/)