RECORD: Darwin, C. R. 1878.02.23-24. Trifolium subterraneum. CUL-DAR67.46. 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.
[46]
Feb. 23d 78/ 79 Trifolium subterraneum
Bloom
Cotyledons increase greatly in size & become oval, no bloom when old, with petioles .8 of inch long! — First true leaf orbicular with base truncated, perfect bloom (on all 3 leaflets, on both surfaces.) 2d true leaf trifoliate perfect bloom on both surfaces. The latter 10˚ P.m sleep in normal manner. The first single leaf bends over towards its petiole like the terminal leaflet of the trifoliate leaves. The petioles of old cotyledons rise a little for 2 formed together angle of 46. whereas at 4˚, 40' they formed together angle of 54˚. (ie 10° 8° nearer) & the blades of old Cotyledon stand almost vertically in most cases. There was next day a conspicuous difference in the position of the cots which during day are exposed almost horizontally. — Again (Feb 24') at night almost vertical. —)
After 2 months!!!
[46v]
3 sets of leaves all different & all sleeping slightly differently
Citation: John van Wyhe, ed. 2002-. The Complete Work of Charles Darwin Online. (http://darwin-online.org.uk/)
File last updated 14 June, 2023