RECORD: Darwin, C. R. 1878. Sleep of Cotyledon. CUL-DAR209.6.172-173. (John van Wyhe ed., 2002-. The Complete Work of Charles Darwin Online, http://darwin-online.org.uk/)

REVISION HISTORY: Transcribed and edited by John van Wyhe. 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-DAR209.6 contains materials for Darwin's book Movement in plants (1880).


172

4

Sleep of Cotyledon 1877 

Dec. 31'

Loridelosia spectabilis no signs of sleep — Jan 6th do

Dec. 31. Nemophila insignis, no signs of sleep Jan 6th do

Dec. 31 Achillea ochroleuca (1 seedling) no sleep Jan 8th no plain signs

Dec. 31 Hookelia californica: no sleep

Dec. 31 Lychnis fulgens: no sleep

Dec 31' Anchusa sempervirens  10. Pm cots at about rt, were I believe horizontal at midday 11° a.m Jan 1': Cots again nearly horizontal I am not sure that this right seedling

Jan 5. Delphinium consolida— no signs of sleep. 2 seedlings.

Jan 8. Aloysia warzcewiczii no signs of sleep.

Jan 8— Crucinella stylosa no signs of sleep

Jan 8 Digitalis gloxiniodes— no signs of sleep

Jan. 23d Vinca alba      do.

—— .29th Agrostemma (Lychnis) coeli-rosa no plain sleep.—

   I think I ought to try these again

173

6

(1) Lychnis coeli-rosa Cineraria maritima.— no signs of sleep. Feb. 6th.

(2) Clarkia elegans,  & 3) Cannabis gigantea— no sleep

Gilia tricolor no decided sign of sleep, but I believe Cots. rise somewhat. certainly rise moderately at night

Lychnis coeli-rosa (Feb. 21) Cots. rise considerably but do not shut 

Dianthus Sinensis (Feb. 21) do. do. do. do. —

4 Mertensia Maritima no sign of sleep

5 Cerasteum tomentosum— Feb 24' no sleep

6 Anagallis Phillipsii Feb 24th no sleep Feb. 24 1 sleep

Limanathes Douglasii Feb 24th— petioles & bases of Cots in close contact of 2 Seedlings, but not of a third.

Feb. 25th 7° a.m. Petioles well apart & I think Cots much flatter.

10° P.m Petioles do approach each other & Cots get flatter.

Lychnis fulgens 1 seedling— Cots do not go to sleep

}

7 Hypericum orientalis

8 Heliotrope

do not sleep. Frank


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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 28 January, 2026