RECORD: Darwin, C. R. n.d. Abstract of Hoffmann, Speciesfrage, 1875. CUL-DAR77.10. 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).
[10]
H. Hoffman Speciesfrage—
Adonis æstivalis self-fertile & proterandrous
[Cross and self fertilisation, p. 365: "Adonis aestivalis (Ranunculaceae). —Produces, according to Professor H. Hoffmann ('Speciesfrage' page 11), plenty of seeds when protected from insects."]
Papaver somniferum self-fertile & seeds germinated.
[Cross and self fertilisation, pp. 365-6: "Papaver somniferum (Papaveraceae).—Thirty capsules from uncovered plants yielded 15.6 grains weight of seed, and thirty capsules from covered-up plants, growing in the same bed, yielded 16.5 grains weight; so that the latter plants were more productive than the uncovered. Professor H. Hoffmann ('Speciesfrage' 1875 page 53) also found this species self-fertile when protected from insects."]
Citation: John van Wyhe, ed. 2002-. The Complete Work of Charles Darwin Online. (http://darwin-online.org.uk/)
File last updated 27 May, 2023