RECORD: Darwin, C. R. & Francis Darwin. 1874.07.08. Pinguicula lusitanica. CUL-DAR59.1.83. Edited by John van Wyhe (Darwin Online, http://darwin-online.org.uk/)

REVISION HISTORY: Transcribed by Christine Chua and edited by John van Wyhe 10.2022. 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).

Pinguicula is a genus of carnivorous plants known as butterworts. These notes are for Darwin, C. R. 1875. Insectivorous plants. London: John Murray. (F1217)


[83]

Pinguicula lusitanica

July 8. 74

The long-stalked glands with purple Heads are confined to roughly speaking the outer 1.2 of each half side of the lamina— They grow more scantily at the outer part of their region

Very quite long hairs gland tentacles grow close up to the extreme margin of the leaf in the folded part. (The narrow margin has the same row of different cells at the extreme margin with no glands on it) The tracheæ have a similar ending ie spiral cells, only not do well developed as in P. communis vulgaris. The stalks of the glands are 3 celled ones at the base like a very short cushion and one long column like one + one like a plug projecting into gland

[sketch] little long gl tentacle terminal cell embedded in & supporting gland with purple Head.

They have no tracheæ— They are abt .02 millimetre long

The sessile shorter glands which I believe are all green are confined to about the same region as the stalked glands but also grow scattered rarely among the spines in the outer parts of the spine-region—

The spines are multicellular hairs— growing near the midrib on abt the inner halves of the both sides of the lamina— They are stiffer & more numerous near the footstalk; & near the midrib (at a given spot)


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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 2 November, 2022