RECORD: Darwin, C. R. [1878?].06.08-09. Cassia neglecta / Draft of Cross and self fertilisation. CUL-DAR209.6.41-43. (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. RN3
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-DAR209.6 contains materials for Darwin's book Movement in plants (1880).
Draft is in the hand of Ebenezer Norman with corrections by Darwin. The text of draft corresponds to Cross and self fertilisation, pp. 358 and 362.
(1
Cassia neglected neglecta June 8th (was awake at 6. 45' a.m)
Left Hand Cot 5º 1/2 above horizon at (8º ( 9' am) rubbed delicately on upper side with pointed stick for 1.'
(after 10' from commencement of rubbing 11º above horizon, so on risen only 5º 1/2
(after 19' from do 12º above horizon.)
(at 8º 48' had sunk again (ie after 39') & stood at only 8º 1/2 above horizon
at (8º 9' am) rubbed delicately on upper side with pointed stick for 1.'
(After 10' from commencement of rubbing 11º above horizon, so risen only 5º 1/2
(After 19' from do 12º above horizon.)
(At 8º 48' had sunk again (ie after 39') & stood at only 8º 1/2 above horizon.) ✔
3º 58' P.m. P.m same Cot . standing 11º above horizon rubbed in same delicate manner with same stick for 1.
after 3' stood at 39º above horizon
after 5'
45º -11º 34º
counting from commencement of rubbing
after 10'
38º
But now at 4º 15 a cot which was hardly was not touched has gone to sleep— So the most the rubbing did was to accelerate going to sleep
June 9th Cots . by no means open at 6º 45 a.m. fully open at 7º 45' a.m.
But now at 4º 15 a cot which was hardly was not touched has gone to sleep ─ So the most the rubbing did was to accelerate going to sleep
June 9 Cots. by no means open at 6º 45 a.m. fully open at 7º 45' a.m
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pollen brought from another plant at Chatsworth contained from respectively 60 and 75 seeds. I have given these statements because Prof. Caspary advances this plant as a case opposed to the doctrine of the necessity or advantage of cross-fertilisation: see Sitzungsberichte der Phys.—oko. Gesell. zu Konigsberg, B. VI. p. 20.)
Delphinium consolida (Ranunculaceae) produces many capsules, but these contain only about half
(2
June 9th Cassia neglected (see before
8º 49. a.m rt hand Cot of fresh fresh plant 6º above, (line from apex to joint) rubbed for 1' with same stick but supporting Cot on nail of other hand.
After 10' (counting from commencement of rubbing) 28º above horizon ie. rose 18º
→ (opposite Cot equally affected)
at 2.52' P.m. 10º above horizon, rubbed in same manner for 1' (N.B this is about same time hour before sleep, as the morning rubbing was before fully awaking)
After 5' (from time of rubbing) 26º angle above horizon ie. rose 16º → (opposite Cot. equally affected)
After 10' angle 25º
(So it does not appear that Cot move more readily in evening about alm 1 1/2 before sleeping time, than shortly after waking in the morning.)
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Papaver alpinum. (d0), H. Hoffmann (Speciesfrage 1875 p. 47) states that this species produced seeds capable of germination only on one occasion.
Corydalis cava (Fumariaceae), sterile: see my the previous discussion on self-sterile plants.
Corydalis C solida. (do), I had a single plant in my garden (1863), and I saw many hive-bees sucking the flowers, but not a single seed was produced. I was much surprised at
(3
C. neglecta
3º. 55
(1) Pin Cot on this side Horizontal (a young & fresh seedling)
4º 31' rubbed with stick for 30" supporting lower surface
4. 37 decidedly a little risen
4 45 29º above Horizon, & opposite Cot. equally risen—
5º fallen to 39º above Horizon, but sleep now coming in as some of other Cots. beginning to rise—
This case proves that Cots not insensible & yet not acted on by 1/2º of sun not very bright— so I conclude burning with lens 1 Cot did cause both Cots to rise, as much as stated
(2 Pins) do do
(3) Pins do do.
(after 10' no effect) — sun not very bright
4º 30' no effect
Tropaeolum 11º 30' square on Chimney Piece
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the flowers which were visited by bees produced between five and six times as many seeds as those which were protected. The covered-up plants not having been much exhausted by seed-bearing, bore a second considerable crop of flower-stems, whilst the exposed plants did not do so.
Cytisus laburnum (do), Seven flower-racemes of flowers ready to expand were enclosed in a large not bag made of net and they did not seem in the least injured
[Diagram]
90 [-] 61 [=] 29
61º 90 29 90 [-] 51 [=] 39
Citation: John van Wyhe, ed. 2002-. The Complete Work of Charles Darwin Online. (http://darwin-online.org.uk/)
File last updated 27 January, 2026