RECORD: Darwin, C. R. [1874-1875]. Draft leaf of Insectivorous plants, folio 48. LINSOC-DWC.2.34. (Cite as: John van Wyhe ed., 2002-. The Complete Work of Charles Darwin Online, http://darwin-online.org.uk/)
REVISION HISTORY: Catalogued, transcribed and edited by John van Wyhe 3.2026. RN1
NOTE: See record in the Darwin Online manuscript catalogue, enter its Identifier here. Reproduced with permission of the Linnean Society of London and William Huxley Darwin. LINSOC-DWC.2 consists of an album of draft leaves of Darwin's books, Earthworms, Insectivorous plants, Cross and self fertilisation, Expression, and Power of movement deposited by The Charles Darwin Trust.
[34]
(48
Utricularia
terminal bud, I believe & it appears that the approximate edges of two division of the leaf already in close proximity forming the a bladder first unite (or have never been divided) & then that the opposite edges unite over, meet & unite: coalesce: I believe so, because in two or three very grey bladders of the larger species on U. vulgaris, about 1/200th of an inch in diameter, one side seemed more perfectly united formed or united than to others, so that the two sides were not symmetrical.)
(As according to the view here maintained the dorsal surface of the bladder consists of one division of the leaf, & the ventral surface of another division ; & as the dioecious true leaves continually bifurcate, there is nothing improbably in the either one or both of the di [illeg]
[34v]
[mathematical notes by George Darwin]
Citation: John van Wyhe, ed. 2002-. The Complete Work of Charles Darwin Online. (http://darwin-online.org.uk/)
File last updated 20 March, 2026