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—

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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 6 May, 2023