RECORD: Darwin, C. R. 1881.07.26-09.29. Fruit - Bloom / Mahonia / Sea-kale / French Poppy. CUL-DAR67.84-85. Edited by John van Wyhe (Darwin Online, http://darwin-online.org.uk/)

REVISION HISTORY: Transcribed by Christine Chua and edited by John van Wyhe 3.2023. 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-DAR67 contains notes on 'bloom'. Francis Darwin explained: "His researches into the meaning of the 'bloom,' or waxy coating found on many leaves, was one of those inquiries which remained unfinished at the time of his death. He amassed a quantity of notes on the subject". LL3: 339. See an Introduction to these folders by Christine Chua & John van Wyhe.


[84]

1881

Fruit. — Bloom

Mahonia. July 24th Fruit yet green, but some few beginning to turn purplish — cleaned 20 berries with cool or cold water & bit of sponge— marked each with white thread, & branch with white wool. — Plant moderately shaded. — Cut off any fruit near which had been accidentally rubbed — Bloom removed very easily. —

Sea-Kale— July 26' 11˚ 30' a.m Cleaned with sponge & cold water 20 fruit & their peduncles marked with white thread — The bloom on fruit thin, & so easily removed, yet it serves to shoot off water, to a certain extent & the sponged berries were much more easily wetted by drops. (a) (Back)

Aug 6' A great many Mahonia berries dropped off over whole plant, perhaps from very hot & dry weather — Only 5 with threads remaining & these do not differ in appearance from the others.

[84v]

Sept 29th I have compared 14 (6 dropped off of the fruit with bloom removed & they seem on the whole of less size than those with bloom. — But hardly any safe difference.

[85]

1881.

Fruit Bloom

French Poppy

August 8' 9˚. a.m. 13 pods with petioles & crowns sponged marked with white threads 13 others left untouched marked black thread.

Sept 18th if any difference those with bloom removed have ripened first


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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 15 June, 2023