RECORD: Darwin, C. R. 1874.06.30-.07.01. Drosera / Draft of Insectivorous plants. CUL-DAR57.94. 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-DAR 54-61 contain material for Darwin's book Insectivorous plants (1875).


[94]

June 30' 74 Drosera (June has 30 days)

Areolar tissue from Toad 5 leaves Reddish Sticks

7° 45' Am — Kept in water all night moistened some with saliva put large quantity on one leaf with pin

July 1 8° 2 of bits completely liquefied & rendered transparent the tissue — 2 not so — & none of these have much inflected leaves — touched the tentacles of the 2 which had digested the tissue with a little saliva. —

The one leaf with a largish quantity of tissue well clasped over it & this the only one well inflected (It is clear that small bits do not much excite plant) (Corresponding bit in water kept on wet moss— still white & opake)

July 1st 7° 30' — one leaf alone has not quite digested— on discs of others nothing left but absolutely transparent very viscid fluid— Even the leaf on which I placed 2 rather large pieces is in this state — so that this tissue is very easily & very quickly digested — One bit of tissue was dotted with black fragmented cells, & these are not digested

Drosera

[94v]

surrounding object. without breaking

With respect to the [period] of [reexpansion], nothing can be more rare

The few tentacles, where few in number, which become inflected, often in a few minutes, after from immersion in pure water, frequently reexpand in the course of 6 or 8 hours, though the leaf remains immersed; & this especially applies to the long-headed tentacles. On the other hand the short tentacles in the outer part circumference borders of the disc, as well as

[The text of the draft corresponds Insectivorous plants, p. 141.]


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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 16 May, 2023