RECORD: Darwin, C. R. 1862.05.01-.06.02. Leschenaultia. CUL-DAR265.7. Edited by John van Wyhe (Darwin Online, http://darwin-online.org.uk/)

REVISION HISTORY: Transcribed by Christine Chua and edited by John van Wyhe 6.2022. 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.

Darwin, C. R. 1861. Cross-breeding in plants. Fertilisation of Leschenaultia formosa. Journal of Horticulture and Cottage Gardener 1 (28 May): 151.

Darwin, C. R. 1871. Fertilisation of Leschenaultia. Gardeners' Chronicle and Agricultural Gazette no. 36 (9 September): 1166.


[7]

Leschenaultia biloba splendens. May 1' 62.—

Mr Turnbull—

Marked 3 flowers with black thread & 1 with mal & put pollen in viscid surface above lip of indusium without disturbing indusium.— (None of these set seeds)

Marked 3 flowers with white thread & routed within indusium with fine brush; just as I did L. formosa; — in doing this I might have put some on viscid surface above.—

In bad indusium widely open — it does not quite well scrap off all pollen from anther: yet a good deal with indusium. Pistil curves over much into gangway into nectary: each petal with double guiding lines of hairs,— Lower lip can be easily opened—

I now find within indusium on lower side of upper lip abundance of pollen. I could see no stigma within indusium; & in large bud with indusium open, the whole interior surface certainly dry, whilst the true external stigma was viscid. dry.

[7v]

I have no doubt insect crawling open indusium & get dusted & would then infallibly rub it on stigma — or would do so in opening indusium for pollen; but gangway &c show that insect suck the nectar & break open the indusium — Admirable case of curious structure remodified into a "common flower." or state of Campanula

Jun 2d. I left pollen on upper excessively viscid surface for 65 hours & not one pollen-tube emitted.—


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

File last updated 25 September, 2022