RECORD: Darwin, C. R. [1878].09.24-26. Dionaea. CUL-DAR209.3.159. (John van Wyhe ed., 2002-. The Complete Work of Charles Darwin Online, http://darwin-online.org.uk/)
REVISION HISTORY: Transcribed by Christine Chua and John van Wyhe, edited by John van Wyhe 12.2022. RN2
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-DAR209.3 contains materials for Darwin's book Movement in plants (1880).
[159]
Dionæa young
Sept 24th—
Dionæa Young leaf—laminae
closed at rt. ∠ to petiole. — Glass F almost vertical attached transversely to closed leaf.
2° . 33' first dot. on Horizontal glass— Dark
distance about 7½ inch
Length of Leaf ??
2.48 to me & to Right, 4° same course
4° P.m new dot — much more magnified
4. 35 to me & Right
5 25 to left & from me
6 to right & back close to start
7° . 15 same course thus far → [sketch]
8. 30 to right & from me
9. 40 straight from me
10. 50 to Right
25 . 6° 45' a.m
8 . 10 same course as during night. while leaf moving to
one side at right angle to plane of closed blades
9.5 a little back
10. 25 from me & to R.
11. 45 far to right zig-zag (cannot mark accurately)
The doubled laminae caught by fold of petiole cause of lateral movement
Used
Dionæa Young
lamina freed— filament fixed to mid-rib
Sept 25.
12° ⨀ on Horizontal glass—
12 30 to light & right
1. 35 same course
3 to light & left
4° to Light
5: 10 from light to right
5 . 50 straight to Light
7. 20 nearly same course
8. 50 to light & left
9. 45 to right
10 . 45 to left no doubt circumnutating
26th 6° 55' a . m
7. 37' to left & from light
8 . 23 to me & to right & back (closed blades nearly perpendicular)
9 . 15 to Light & left (mark too much exaggerated to be very accurate
10 to right.
Used
Height of Leaf 1.2 inch
13 ½ inches below Horizontal glass to top of Leaf
[159v]
[DECLARATION AGAINST WAR]
Citation: John van Wyhe, ed. 2002-. The Complete Work of Charles Darwin Online. (http://darwin-online.org.uk/)
File last updated 20 December, 2025