RECORD: Darwin, C. R. [1878?].02.22. Oak (Quercus) / Draft of Forms of flowers. CUL-DAR209.4.362. Edited by John van Wyhe (Darwin Online, http://darwin-online.org.uk/)

REVISION HISTORY: Transcribed by Christine Chua and edited by John van Wyhe 9.2022. 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-DAR209.4 contains materials for Darwin's book Movement in plants (1880).


[362]

Feb. 22' Oak [American]

illuminated from above — Hor-glass [sketch]

[data not transcribed]

[362v]

(A text)

The long-styled plants generally tend to flower a little before the short-styled: for instance I had twelve plants of each form, growing in separate pots & treated in every respect alike; & at the time when only a single short-styled plant was in flower, seven of the long-styled had expanded their flowers.

We shall, also, presently see that the short-styled plants produce more seed than the long-styled. It is remarkable, according to Prof. Oliver* (*Nat. Hist. Review July 1862 p. 237) that the ovules in the unexpanded & unimportant flowers of the latter are considerably larger than those of the short-style flowers; & this I suppose is connected with the long-styled flowers producing fewer seeds, so that the ovules have more space & nourishment for rapid development.)

[Forms of flowers, pp. 16-17: "The long-styled plants generally tend to flower a little before the short-styled: for instance. I had twelve plants of each form growing in separate pots and treated in every respect alike; and at the time when only a single short-styled plant was in flower, seven of the long-styled had expanded their flowers.
We shall, also, presently see that the short-styled plants produce more seed than the long-styled. It is remarkable, according to Prof. Oliver,* that the ovules in the unexpanded and unimpregnated flowers of the latter are considerably larger than those of the short-styled flowers; and this I suppose is connected with the long-styled flowers producing fewer seeds, so that the ovules have more space and nourishment for rapid development."]


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

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