RECORD: Darwin, C. R. [1878].06.07-09. Drosera rotundifolia / Draft of Cross and self fertilisation, folio 621. CUL-DAR209.3.177-178. Edited by John van Wyhe (Darwin Online, http://darwin-online.org.uk/)

REVISION HISTORY: Transcribed by Christine Chua and edited by John van Wyhe 12.2022. 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-DAR209.3 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. 360.


[177]

Drosera June 7th & 8th to morning of 9th

F. 135 (1/2 scale 4 sets of lettering)

[178]

Drosera rotundifolia: circumnutation of young leaf was [few words illeg] traced from 9, 15 a.m on from 7th to 8˚ 30' am 9th. The glass filament was stuck affixed to the back of the leaf blade. Figure alm to 1.2 on a scale. 47˚15'

[178v]

10 621

Chap. E 10

few capsules which containing any good seeds.

181) Phaseolus multiflorus (Leguminosæ), when protected from insects produced on two occasions about 1/3 or 1/8 of the full number of seeds ( :see my article in Gard Chronicle, 1857 page 225 & 1858 p. 828; and also Annals & Mag. of Nat. Hist. 3rd series, Vol. 2. 1858 p. 462.) Dr. Ogle (Pop. Sc. Review 1870 p 168) found that a plant of this species was quite sterile when covered up. The flowers are not visited by insects in Nicaragua, & according to Mr. Belt in the species is there quite sterile: Nicaragua ( The Naturalist in Nicaragua p. 70).

Vicia faba (do) seventeen covered up plants yielded 40 beans, whilst seventeen plants left unprotected & growing close alongside produced 135 beans; these latter plants were, therefore, between three and four times more fertile than the protected plants: see 'Gardeners' Chronicle' for fuller details, 1858 page 828.

Erythrina (sp.?) (do) Sir W. MacArthur informed me that in New S. Wales the flowers do not set, unless the petals are moved in the same manner as is effected done by insects.


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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 21 January, 2023