The Complete Work of Charles Darwin Online

RECORD: Darwin, C. R. 1874.05.01-02. Cassia corymbosa. CUL-DAR209.1.16-18. Edited by John van Wyhe (Darwin Online, http://darwin-online.org.uk/)

REVISION HISTORY: Transcribed by Christine Chua and edited by John van Wyhe 6.2022. 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-DAR209.1 contains materials on circumnutation of leaves and sleep for Darwin's book Movement in plants (1880).

Cassia corymbosa

May 1 at when asleep at 9° P.m

[annotated diagram]

[in left margin:] I ought to say petioles rise so many degrees when they go to sleep.

5°
175° —
32
— 158
60
130 —
45°
145° —

[in right margin:] Young Plant angle of petioles from axis to base of lower leaflets.

May 2nd. 10. 10 o'clock a.m.

study fully awake.

46° — so the footstalk had fallen 41°
134 144
58
132 — 122
70
120
77
113

[in margin:] C. corymbosa

[annotated diagram] so the footstalk had fallen 41° Same plants & same leaves

10.10 am study awake May 2d

[figure]

Looking towards the light

May 2d 1874

Same leaf asleep & awake

[figure]

C. Corymbosa lowest marked leaf part asleep 9.10 p.m study

[insertion in right margin:] L. Darwin

[verso] [blank]

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