The Complete Work of Charles Darwin Online

RECORD: Darwin, C. R. 1874.07.23. Tamarindus indica. CUL-DAR66.30. 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-DAR66 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.

[30]

July 23d 1874. Tamarindus Indica.

Both surfaces of young leaves well protected by bloom & silvery—

(In very old leaves upper surface rather wetted.) (goes for nothing)

In the younger leaves, when brought into my study, leaflets approached each other & were directed upwards above the main petiole.

When Asleep the leaflets approach & touch each other & all point toward end of petiole, to do this they must twist on their axes —

The movement is like mimosa, but the leaflet do not I think rise up & meet each other. I can see nothing very peculiar in movement.

The lower margin of leaflets depends far below petiole

[sketch]

[3 lines not transcribed]

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