RECORD: Darwin, C. R. 1862.07.29. Satureia hortensis / Summer Savoy. CUL-DAR109.A11. Edited by John van Wyhe (Darwin Online, http://darwin-online.org.uk/)

REVISION HISTORY: Transcribed by Christine Chua and edited by John van Wyhe 11.2022. 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 volumes CUL-DAR108-111 contain material for Darwin's book Forms of flowers (1877).


[A11]

Satureia hortensis. Summer Savoy. July 29.62

I raised 11 Plants, one alone had perfect anthers purple ie was Hermaphrodite. The 10 others were female. The only difference in pistils was that in female they were a shade longer. Largely visited by Humble & Hive Bees ─ In pot in greenhouse─ Culture under heat perhaps must have increased the Females.─ See about seeding ─ Case exactly like Thyme. ─ Anthers of female a more colourless transparent double double membrane.─ Winter Savoy S. Montana grew near. (all the latter sp. are Hermaphrodite but perhaps all propagated from same one plant.)

It is very interesting that this one hermaphrodite plant sufficed to fertilise all the ↘

[A11v]

10 female plants. The hermaphrodite was the finest plant of lot; & all its seeds weighed 33.2 gr. ─ A fine female plant, (of which all the pods were out, I believe quite clearly picked) had seed weighing 78.0 g, ie more than double ─ showing how fully it was fertilised. This greater fertility was due to more heads producing seed, for about an equal number of heads produced nearly equal weight of seed. Capital division of labour.

See the note-Book for case of Thyme.─


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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 26 January, 2023