The Complete Work of Charles Darwin Online

RECORD: Darwin, C. R. [1878.06].18-19. Acacia retinoides / Draft of Cross and self fertilisation. CUL-DAR209.3.58-59. 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: Reproduced with permission of the Syndics of Cambridge University Library and William Huxley Darwin. The volume CUL-DAR209.3 contains materials for Darwin's book Movement in plants (1880).

Draft is in the hand of Ebenezer Norman with corrections by Darwin. The text of the draft corresponds to Cross and self fertilisation, p. 377.

[58]

Acacia retinoides

[data not transcribed]

[58v]

[top of page excised]

Mr. Hassall took pains in estimating the number of pollen-grains produced by a flower of the Dandelion (Leontodon), and found the number to be 243,600 and in a Pæony 3,654,000 grains* *Annals & Mag. of Nat.

[The text of the draft corresponds to p. 376.]

[59]

Acacia

[data not transcribed]

Used

observed at longer intervals

[59v]

flowers, [text excised]

necessitates the development of so prodigious an excess of this precious substance, why it may be asked are flowers always left open? As many plants exist throughout the vegetable kingdom which bear cleistogene flowers, there can hardly be a doubt that all open flowers [text excised]

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