RECORD: Darwin, C. R. 1874.07.27. Coronilla rosea / iberica / varia / glauca / glauca grandiflora / emerus. CUL-DAR209.1.35. Edited by John van Wyhe (Darwin Online, http://darwin-online.org.uk/)
REVISION HISTORY: Transcribed by Christine Chua and edited by John van Wyhe 6.2022. 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 volume CUL-DAR209.1 contains materials on circumnutation of leaves and sleep for Darwin's book Movement in plants (1880).
[35a]
July 27 — 1874
Coronilla rosea
Compound leaves with 9 or 10 opposite leaflets, — owing to position of plant, leaflets of many leaves stand vertically, & are often directed towards base of leaf — Both sides silvery
When asleep the leaflets approach each other & in leaves thoroughly asleep touch each other so that under surfaces exposed & they point towards base of leaf, as completely as in Mimosa they point to apex of leaf. This quite new movement. — The leaves which point vertically upwards & depend vertically downwards behave in the same manner.
(Coronilla iberica, fewer leaflets — horizontal —both sides silvery—) (a)
They point so much to base that the midribs of the leaflets in some of the leaves almost, but not quite, formed a straight line. The leaflets overlap only a little, as leaflets stand some way apart. The single terminal leaflet turn right over & point towards base of leaf. The peduncles of flowers also head over the axis — This sleep movement is evidently connected with slight [illeg] tendency of leaflets to point a little towards base when awake — instead of standing merely at right angle to common petiole
[35av]
(a) Plants of this species too old for good [movement], but evident slight tendency to same kind of movement. ─ ─ plant in the flowers as in C. rosea
[35b]
C. varia both surfaces silvery
When asleep the leaflets approach each other & turn in a slight degree backwards or towards stem axis; not nearly so well marked as in C. rosea
C. glauca ─ same kind of foliage, both sides silvery ─ scarcely any movement in sleep ─ in very young leaves the leaflets slightly approach each other
C. glauca grandiflora do do do
(as above)
[35bv]
Hedysarum sleeps, (one species no Pagin says sleeps)
Coral Jue both surfaces silvery apparently doe not sleep (i.e. a leaf cut off) ─ but tra traced on wall on Terrace ─ apparently the 2 halves of ⸮ each younger leaf a little approach each other.─
Brugmansia no movement
Coronilla emerus ─ a bush traced against wall no sleep movement.─
Citation: John van Wyhe, ed. 2002-. The Complete Work of Charles Darwin Online. (http://darwin-online.org.uk/)
File last updated 25 September, 2022