RECORD: Darwin, C. R. n.d. Evidently homologous with the tentacles of Drosera. CUL-DAR60.1.154. 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 volumes CUL-DAR 54-61 contain material for Darwin's book Insectivorous plants (1875).


[154]

Evidently homologous with the tentacles of Drosera, & not with the glandular hairs of other ordinary plants. Even the backs of the leaves, with the exception of a narrow medial line, are covered with these glands, & there are small ones on the flower-peduncles & on the sepals of the calyx. The glands are of two kinds; small colourless ones which are almost sessile, & larger bright pink ones, of unequal sizes, supported on short footstalks which are green, &, arranged in longitudinal rows. The larger glands have convex their upper surfaces convex & the lower surfaces & flat or concave lower surface, so that they resemble in shape a mushroom in shape. They are composed of rather large pentagonal or hexagonal cells. which are rather smaller towards the centre, & at the circumference are a little produced into rays. The central cells ones, which are rather smaller than the others, generally contain purple granular matter aggregated into mulberry-like masses, whilst the circumferential cells contain only purple fluid. These glands secrete much viscid fluid which is acid.)

Also sepals of [illeg] More of catching 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 14 February, 2023