RECORD: Darwin, C. R. [ny].09.16. D. Capensis (Kew). CUL-DAR60.1.136-137. (John van Wyhe ed., 2002-. The Complete Work of Charles 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).
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D. Capensis (Kew)
Sept. 16. Limb of leaf elongated, narrowing gradually narrowing towards apex, which is bluntly pointed & reflexed.—
, pedicel foliaceous nearly as broad as limb of leaf — which is greatest peculiarity: leaves crowded round wooded woody axis(?+) (seem to grow into little bush)— Glands Tentacles Tentacles extremely numerous & crowded: those on margin much longer than those on disc. — reflexed — glands red, none no long-Headed — viscid matter extremely viscid.— reddens litmus paper. —
Disc of leaf longitudinally slightly concave.
(Gland-bearing disc above 1 inch long — pedicel as long or longer than disc in my specimen.)
As my plant was recovering from an extremely ill-state of health, the slowness of the movements show nothing. I could not case, perhaps from this reason any movement by routing tentacles.
Atoms of meat, placed on lateral tentacles caused them in 2º. 30' slightly inflected 3º 45, from time of putting on well inflected, & strongly in 2º. 30' additional time. —
Sept. 17. 8º 30' all adjoining tentacles now on same side of leaf, now crowded on the bit of meat
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Sept 16
5º. 15' put on bits of flies on 2 leaves near tip. — Sept 17. (in 15º) 8º 30 in both tip of leaf alone bent over, with no lateral inflection of leaf. — now in one case, whole leaf rolled over
Sept 30. I tried again routing tentacles no effect.
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D. Capensis
The minute drops of N. of Ammonia 1 gr to 12 oz in 2º. 30' caused one or two tentacles to be slightly inflected
Put on 2 atoms of cork, of blue glass & cinders: the cork in 2º. 30' caused decided inflection — the others never moved.
Sept 16th 9º. A.m. put squashed fly on the foliaceous pedicel. Sept 17' no effect. — Sept 18th do.
Last
Sept 16th 9º 10 put 1/2 a fly on middle of leaf.— at 5º In few hour the lateral tentacles on both edges curved in & touched the fly. At 5º 15 leaf a little bent transversely under the fly. Sept 17th 8º 30, tip of leaf, bent completely over fly, so that apex rested on pedicel; no lateral inflection of leaf itself, & now Sept 18' middle of leaf rolled closely round the fly
Citation: John van Wyhe, ed. 2002-. The Complete Work of Charles Darwin Online. (http://darwin-online.org.uk/)
File last updated 8 January, 2026