RECORD: Darwin, C. R. 1870.10.01. Drosera filiformis / Plants very small but yet act well with atoms of dry meat. CUL-DAR60.1.133. (John van Wyhe ed., 2002-. The Complete Work of Charles Darwin Online, http://darwin-online.org.uk/)

REVISION HISTORY: Transcribed by Christine Chua and edited by John van Wyhe 12.2022. 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-DAR 54-61 contain material for Darwin's book Insectivorous plants (1875).


[133]

Drosera filiformis Oct. 1. 1870. Plants very small, but yet acts well with atoms of dry meat.— (Also I wet handle of scalpels with my saliva & then touched several heads; these all curved greatly in less than 1º — after interval of 18º all straight) again.—

I put on larger atoms of charcoal, brick & wood, no trace of effect— nor had hard friction, or friction & brick — yet the filaments, bearing charcoal, aft for 2 or 3 days, bowed by sympathy when atom of meat had been put on on neighbouring filament. — After friction glands secreted much viscid fluid after 20º.

After meat great bowing after 50'. —

After about 24º or 36º the filaments at no great distance from one with meat all slowly bow towards it, until ultimately from all side of narrow leaf they meet in one great drop

[133v]

of fluid round meat.— So sympathy, but slower than in English Drosera —

Great distinction of non-nitrog. substance & friction producing no effect. —

Solid & fluid. Nitrog. cause movement.

sympathetic movements, I think, slower.

Drosera filiformis


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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 14 February, 2023