RECORD: Darwin, C. R. 1864.07.10. Vine against House. CUL-DAR49.104. Edited by John van Wyhe (Darwin Online, http://darwin-online.org.uk/)
REVISION HISTORY: Transcribed by Christine Chua and edited by John van Wyhe 1.2022. 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 volume CUL-DAR49 contains notes for Natural selection chap. 3 on 'On...organic beings occasionally crossing' or dichogamy.
[104]
July 10 64 – Vine against House when Corolla drops off, like a cap without opening, the bowed stamens are found resting on stigma covered with pollen! Here seems case of self-fert – yet it is known they require aid & many gardeners go over with with pencil brush – Pollen incoherent, but not in very perfect degree & no nectar (yet these is in Cissus discolor) & stigma projects & flower naked & inconspicuous – Also gardeners recommend shaking pollen on paper & [illeg] it up in cloud –
Perhaps stigma not quite mature
[in margin:] Dichogamy
[104v]
& when flower opens –
I suppose a self- fertilised flower occasionally crossed by wind.
Stigma large – prominent but not plumose –
Pollen not copious.
(Certainly no honey)
Cissus discolor – flower small with bright red calyx? so as to be more conspicuous – secrete nectar. Pollen small in quantity-
Citation: John van Wyhe, ed. 2002-. The Complete Work of Charles Darwin Online. (http://darwin-online.org.uk/)
File last updated 25 September, 2022