RECORD: Darwin, C. R. [1877?].02.10-11. Lychnis githago ‚ Draft of Cross and self fertilisation. CUL-DAR209.4.235-236. Edited by John van Wyhe (Darwin Online, http://darwin-online.org.uk/)

REVISION HISTORY: Transcribed by Christine Chua and edited by John van Wyhe 9.2022. 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 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.

"Norman, Ebenezer, 1835/6-1923. 1854- Schoolmaster at Down and from 1856 and many years thereafter copyist for CD. 1856 Aug. 17 First payment for copying in CD's Account book (Down House MS). Many thereafter. CCD6:444. 1857 CD to Hooker, "I am employing a laboriously careful Schoolmaster". CCD6:443. 1858 CD to Hooker, "I can get the Down schoolmaster to do it [i.e. transcribe] on my return". CCD7:130. 1871 Banker's clerk in Deptford." (Paul van Helvert & John van Wyhe, Darwin: A Companion, 2021)


[235 and 236]

Feb 10 & 11'

Lychnis Lychnis githago nutation of hypocot stem circumnutation of hypocotyl traced from 8° 15' am Feb 10th to 12° 10' P.m Feb. 11th.

Fig 11 (1/2 scale)

(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 12°15 Pm on the following day.—

Tracing magnified alm 13 times here reduce to 1/2 scale

[236v]

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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."]


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

File last updated 7 December, 2022