The Complete Work of Charles Darwin Online

RECORD: Darwin, C. R. n.d. Centrosema. CUL-DAR209.10.20. Edited by John van Wyhe (Darwin Online, http://darwin-online.org.uk/)

REVISION HISTORY: Transcribed by Christine Chua and edited by John van Wyhe 7.2022. 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-DAR209.10 contains notes on sleep (Leguminosae) for Darwin's book Movement in plants (1880).

[20]

Centrosema sp. from Itajahy.

Cots green, but retain almost same shape as whilst within the seed— do not move at night—

First pair of true leaves, no bloom, depend. vertically at night— Petioles rises were at 10° 30' a.m 91° together & 10° 30' P.m only 58° — so 33° nearer at night — petioles rose 16 1/2

[Movement in plants, p. 365: "Uraria (Tribe 6) and Centrosema (Tribe 8).—The leaflets of Uraria lagopus and the leaves of a Centrosema from Brazil both sink vertically down at night. In the latter plant the petiole at the same time rose 16 1/2°."]

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