RECORD: Darwin, C. R. 1864-1865. Common long-styled Primrose / Common short-styled Primrose. CUL-DAR110.A2-A5. (John van Wyhe ed., 2002-. The Complete Work of Charles Darwin Online, http://darwin-online.org.uk/).
REVISION HISTORY: Transcribed and edited by John van Wyhe 2.2026. RN1
NOTE: See record in the Darwin Online manuscript catalogue, enter its Identifier here. Reproduced with the permission of the Syndics of Cambridge University Library and William Huxley Darwin. The volumes CUL-DAR108-111 contain material for Darwin's book Forms of flowers (1877).
A2
1865 Common long-styled Primrose
Black Thread — pollen from same plant
White Thread pollen from Red Primrose from Nor 3, 13, 14, 18, 19, 21, 22.
Black thread (15 flowers) |
White Thread 20 flowers |
White wool Pollen of short-styled common Primrose (12 flowers) |
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(done) |
(done) |
(done) |
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Common Short-styled Primrose |
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Black Thread (15 flowers) |
White Thread (10 flowers) |
White Wool pollen of long-styled (12 flowers) |
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A2v
(March 3d 1865 White Primrose, which became single, after dividing from being double; is a short-styled Plant: 6 flowers with own pollen — Black Thread.)
(April 20 Crossed 4 flowers alone left with pollen of short-styled common Primrose white Thread.
(None one set any pods) XX only this
(Used)— Illegitimate & Specific differences
Oxlip
Specific Differences of Primrose
A3
Long-styled common Primrose 1865
Black Th. pollen same form |
Black W. pollen of same form of oxlip |
White Th. |
White W. |
[table figures not transcribed] |
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15 ft fert |
8 ft fert |
20 ft fert |
12 ft fert |
See Back |
(used) |
If 3 poor pods with less than 5 seed be omitted average is 18.9 |
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A3v
All seeds of about same size, but those by Red Primrose & by self & by exlip rather larger, from being few —
21. f. (during 1864 & 65) of long-styled were fertilised homomorphically & 14 produced capsules with
[calculation
- giving average of 52.2. seeds
A4
Short-styled common Primrose 1865
Black Th. |
Self fert |
Black W: |
White Th. |
White W. |
[table not transcribed] |
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15 fert |
Average 5.6 |
8fl fert |
10 ft |
12 ft |
White Th. Black Th. & self as good seeds as white wool
Sick Plant
X more flower quite failed in setting
Do not count them on this plant
A4v
18 ft. (during 1864 & 65) of short-styled were fert. Homomorphically & 7 produced pods,
yielding
[calculations]
Average of 18.8 seeds
Perhaps too little as 3 bad pods with under 6 seeds
Or say perhaps better
[calculations]
A5
Common Primrose Crossed Spring 1864.
Long-styled |
Short-styled |
50 rather poor |
5 fine |
38 |
6 |
44 |
6 |
32 |
24 |
4/164 (41 [illeg] |
4/41 (10. average |
All rather small seed |
All fine seed |
(Used)
Six were crossed & produced 4. capsules
Six were crossed & produced 4 capsules
Both these were homomorphic [illeg], how wonderfully more sterile short-styled than long-styled!!!
These unions were made in Spring of 1864.
Citation: John van Wyhe, ed. 2002-. The Complete Work of Charles Darwin Online. (http://darwin-online.org.uk/)
File last updated 12 February, 2026