The Complete Work of Charles Darwin Online

RECORD: Darwin, C. R. [1881].00.26-27. Lactuca comm Lettuce. CUL-DAR62.101. Edited by John van Wyhe (Darwin Online, http://darwin-online.org.uk/)

REVISION HISTORY: Transcribed by Christine Chua and edited by John van Wyhe 5.2023. 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-DAR62 contains for Darwin's papers 'The action of carbonate of ammonia on the roots of certain plants', 1882, F1800 and 'The action of carbonate of ammonia on chlorophyll-bodies', 1882, F1801.

[101]

Lactuca comm Lettuce— Seedlings with 5 or 6 leaves & nearly fully grown plants left from 2° & 4° P m on 26th to 9° a.m 27th in sol of 4 to 1000 & 10 many full-grown plant left from 4° to 9° in sol. of 7 to 1000

Plants not in the least injured— tips of roots rendered opake, but no good aggregation, except in a thickish leading root from old plant in the stronger sol. observed 11° 30' & here above tip there were some short alternate rows with dark brown matter as in Eu. peplus. — Here there was brown matter in the almost [illeg] cells of root-cap. — No root-hairs near tip of roots. Trace

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