RECORD: Darwin, C. R. 1873.06.22-29. Frank has examined 3 common pea-flowers which I gathered early in morning. CUL-DAR77.63. Edited by John van Wyhe (Darwin Online, http://darwin-online.org.uk/)
REVISION HISTORY: Transcribed by Christine Chua and edited by John van Wyhe 2.2023. 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 volumes CUL-DAR 76-79 contain material for Darwin's book Cross and self fertilisation (1876).
[63]
Peas
Jun 22 /73/ Frank has examined 3 common pea-flowers, which I gathered early in morning. & which had not petals fully expanded & which, judging from analogy, would not have been for a day or two visited by honey-sucking bees — yet the pollen-grains from 2 of these flowers had their tubes exserted — I have hardly a doubt that it is a case of premature fertilisation.— Jun 29th Frank has now examined 5 additional dry flowers which I gathered, & which were not quite fully expanded, & in all there were pollen-tube protruded & sometimes of considerable length. I think this satisfactory accounts for not intercrossing. (Probably stigmatic surface premature). (8)
Citation: John van Wyhe, ed. 2002-. The Complete Work of Charles Darwin Online. (http://darwin-online.org.uk/)
File last updated 28 May, 2023