RECORD: Darwin, C. R. 1877.04.06. Pollen-tube of willow is very weak Honey & water. CUL-DAR111.A59. Edited by John van Wyhe (Darwin Online, http://darwin-online.org.uk/)
REVISION HISTORY: Transcribed by Christine Chua and edited by John van Wyhe 1.2023. 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).
See Forms of flowers, p. 337.
[59]
Pollen-tube of willow is very weak Honey & water grow to an extraordinary length.
do not seem at all to avoid light
Sol. of Honey just tasting sweet.
Put in long narrow box illuminated from one end & left for 6° (& for 22°) myriads of tube in every conceivable direction — Light no effect — tubes look inordinately longer but really only about 13 times length of diameter of [illeg] after 22°
(Ap 6' 77)
Willow-pollen
2 glasses one illuminated from below by [illeg] & one on blackish paper—
Citation: John van Wyhe, ed. 2002-. The Complete Work of Charles Darwin Online. (http://darwin-online.org.uk/)
File last updated 6 May, 2023