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]


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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 20 December, 2025