The Complete Work of Charles Darwin Online

RECORD: Darwin, C. R. [ny].04.05. Amaranthus caudatus. CUL-DAR209.8.1. 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 volumes CUL-DAR209.7-8 contain notes on heliotropism (phototropism) for Darwin's book Movement in plants (1880).

[1]

April 5. Amaranthus caudatus Heliotropism

3 seedlings painted with thick Indian Ink lower half close to ground or nearly 1/2 of Hypocotyl, bowed to light.—

3 painted upper 1/2 or 1/3 — of these 2 bowed ~~from~~ light! & 1 bowed as much to light as any!! I could see no difference in the manner in which painted

1 with narrow ~~rim~~ zone about .18 deep painted ~~beneath Cots~~, a little bowed to light.

The pot was laid on one side during night & all the seedlings next morning were bowed upwards

Paint useless

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