RECORD: Darwin, C. R. n.d. Utricularia / Kew specimen. CUL-DAR59.2.87. Edited by John van Wyhe (Darwin Online, http://darwin-online.org.uk/)

REVISION HISTORY: Transcribed by Christine Chua and edited by John van Wyhe 11.2021. 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).


[87]

Utricularia Kew Spec

Terminal buds in U. intermedia rather more globular, but it is not a well marked difference. The notches on the branches which in vulgaris are armed with one spike only in intermedia bear 3 or 4. The branches which form the whorls form a more acute angle with the stem in U. intermedia & the branches themselves dichotomise at acuter angles. The branches & main stem are proportionately thicker giving the plane a much coarser look. The bladders are twice as big as those of Vulgaris & seem to grow only at the base of the branches round the stem

The structure of the valve & collar is the same as vulgaris. Six spherical headed glands & about 12 transversely long ones. Long head glands as in Vulgaris. Four spines, in pairs, one over the other consisting of more than 2 joints & reaching as far back as the hinge. Side bristles about 7 or 8 in number. Antennae have 9 secondary bristles not counting the terminal bifurcation. The quadrifids as in vulgaris. Bifids & stomalike-papillae also as in Vulgaris - The sides of the peristome more prominent & arched.

87v]

(U. vulgaris) (U Vulgaris)


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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 25 September, 2022