RECORD: Darwin, C. R. [1864?].07.01-30. O. rosea all plants have pistils longer than longest stamens. CUL-DAR109.B27. Edited by John van Wyhe (Darwin Online, http://darwin-online.org.uk/)
REVISION HISTORY: Transcribed by Christine Chua and edited by John van Wyhe 11.2022. 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-DAR108-111 contain material for Darwin's book Forms of flowers (1877).
[B27]
O. rosea all plants have pistils longer than longest stamens; nearly twice as long as filament of longest stamen — The longer filament nearly twice as long as the shorter ones.— [sketch]
July 1 fertilised 6 more flowers with own pollen (ie by same camel bush.) I doubt whether they fertilise themselves without aid.
Oxalis tropæoloides, on other hand, sets under cover multitude of pods & its stigmas are on level, or very slightly below the upper stamens & so certainly get self-impregnated.—
Saw Humble-bee repeatedly searching both species
July 30 I now find that O. rosea under net, which has projecting stigma has set a few pods spontaneously, but absolutely as nothing compared with those plants which have been freely exposed to Bees.—
Citation: John van Wyhe, ed. 2002-. The Complete Work of Charles Darwin Online. (http://darwin-online.org.uk/)
File last updated 2 February, 2023