The Complete Work of Charles Darwin Online

RECORD: Darwin, C. R. 1861.10.27. Hooker sent me a Canarina. CUL-DAR49.69. 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.

[69]

Oct 27 1861. Hooker sent me a Canarina - One anther sheds pollen early which lies in mass on flat surface close beneath stigma - I doubt whether it would get on stigma, things so close, without aid - Kerner says pistil anther & nektar blast from tube which

secretes (?internally?) more nectar if insect would brush over the mass of pollen & crosses would be occasionally effected.

Dichogamy

over

[69v]

I have just examined another flower. The fertile stamen & 2 sterile petaloid stamens unite & make tube, with the pistil at back, so insect would certainly brush it in going - No nectar in this flower which opened in water.

[sketch]

fertile stamen

stigma

shed pollen

tubular nectary

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