RECORD: Darwin, C. R. 1858.05.29. J Lubbock remarked to me last year that central or sub-central flower. CUL-DAR47.10. Edited by John van Wyhe (Darwin Online, http://darwin-online.org.uk/)

REVISION HISTORY: Transcribed by Christine Chua and edited by John van Wyhe 7.2022. 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-DAR47 contains notes for Natural selection chap. 7 'Laws of Variation'.


[10]

May /58 /

J. Lubbock remarked to me last year that central or sub-central flower in the trusses of the Fancy Pelargonium very often had one or both of 2 upper petals without the mark of colour.— I have now observed this in several cases.— It is a sort of Peloria,— a mere vestige of it.—

Pelargonium differs from geranium in having flower irregular. —It is return to geranium type of which Decandolle has given case of sport other way.— (over)

under Decandolle Ch. 4. at (Ch. 7. best under Peloria)

[10v]

I find it is always (in 3 vars) the central flower which lose other dark shade on one or both petals— & with these nectary is most gradually & beautifully reduced, when neither petal has dark shade there is no nectary [illeg], & when one petal has, there is short one.— sepals of Calyx become slightly more regularly divergent when no splash of colours.— Pretty case of correlation of splash of colour & nectary.—

It is most common in certain varieties.

The main point is, if one petal loses the splash, nectary shortened.—

May 29th. I fd one not central flower without splash on one petal & this had nectary perfect.—


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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 28 August, 2023