RECORD: Darwin, C. R. [1877?].02.10-11. Lychnis githago / Draft of Cross and self fertilisation. CUL-DAR209.4.235-236. (John van Wyhe ed., 2002-. The Complete Work of Charles Darwin Online, http://darwin-online.org.uk/)
REVISION HISTORY: Transcribed by Christine Chua and John van Wyhe, edited by John van Wyhe 9.2022. 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 volume CUL-DAR209.4 contains materials for Darwin's book Movement in plants (1880).
Draft of Cross and self fertilisation in the hand of Ebenezer Norman with corrections by Darwin.
[235-236]
Feb 10 & 11'
Lychnis Lychnis githago nutation of hypocot stem circumnutation of hypocotyl traced from 8º 15' am Feb 10th to 12º 10' P.m Feb. 11th.
Fig 11 (1/2 scale)
8. 17 a.m
8. 50
11. 55
12. 48
1º
1. 50
6º. 4
8. 31
9. 15
10. 53 P.m Feb 10'
6. 55' a.m Feb 11'
7. 35'
8. 25
9. 22
10. 10
11. 4
11. 35
12. 10
(reduced to 1/2 scale no lettering
middle Part when reduced magnified 8 1/2 times
Githago Lychnis:
circumnutation of hypocotyl, obser traced on horizontal glass by means of filament fixed transversely across its filament, fro. 8.15 am to 12º15 Pm on the following day.—
Tracing magnified alm 13 times here reduce to 1/2 scale
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Chapter 0 9
They grew to an extraordinarily large size, and on August 29th were examined. At first sight they appeared entirely destitute of capsules; but on carefully searching their many branches, two or three capsules were found on three of the plants, half a dozen on the fourth, and about eighteen on the fifth plant; but all these capsules were small, some being empty; the greater number containing ed only a single seed, and very rarely more than one. After this examination the nets were taken off; and the bees immediately carried pollen from one to the other of these almost self-sterile plants, for no other plants grew near. After a few weeks the ends of the branches on all five plants became covered with capsules, presenting a curious contrast with the lower and naked parts of the same long branches. These five plants therefore inherited almost exactly the same sexual constitution as their parents; and without doubt a self-sterile race of Mignonette could have been easily established.
(Reseda lutea. Plants of this species were raised from seeds gathered from a group of wild plants growing not far at no great distances from
[Cross and self fertilisation, pp. 339-40: "They grew to an extraordinarily large size, and on August 29th were examined. At first sight they appeared entirely destitute of capsules; but on carefully searching their many branches, two or three capsules were found on three of the plants, half-a-dozen on the fourth, and about eighteen on the fifth plant. But all these capsules were small, some being empty; the greater number contained only a single seed, and very rarely more than one. After this examination the nets were taken off, and the bees immediately carried pollen from one of these almost self-sterile plants to the other, for no other plants grew near. After a few weeks the ends of the branches on all five plants became covered with capsules, presenting a curious contrast with the lower and naked parts of the same long branches. These five plants therefore inherited almost exactly the same sexual constitution as their parents; and without doubt a self-sterile race of Mignonette could have been easily established.
Reseda lutea.—Plants of this species were raised from seeds gathered from a group of wild plants growing at no great distance from my garden."]
Citation: John van Wyhe, ed. 2002-. The Complete Work of Charles Darwin Online. (http://darwin-online.org.uk/)
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