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 Thread

White wool

Pollen of short-styled common Primrose

(12 flowers)

|||||||||||||||

||||||||||||||||||||

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(done)

(done)

(done)

 

 

 

Common Short-styled Primrose

Black Thread

(15 flowers)

White Thread

(10 flowers)

White Wool

pollen of long-styled

(12 flowers)

|||||||||||||||

(done)

||||||||||

(done)

||||||||||||

(done)

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.
pollen of R. Primrose

White W.
pollen of short-styled P.

[table figures not transcribed]

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

 

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.
pollen same form

Self fert

Black W:
pollen same form oxlip

White Th.
pollen of Red Primrose

White W.
pollen of long-styled Primrose

[table not transcribed]

 

 

 

 

 

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.


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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 12 February, 2026