RECORD: Darwin, C. R. 1869.11.21-1871.07.19. Digitalis purpurea. CUL-DAR79.167. (John van Wyhe ed., 2002-. The Complete Work of Charles Darwin Online, http://darwin-online.org.uk/)

REVISION HISTORY: Transcribed by Christine Chua and edited by John van Wyhe 3.2023. 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 volumes CUL-DAR 76-79 contain material for Darwin's book Cross and self fertilisation (1876).


[167]

Jan 31— 1870 Measured to tips of Leaves

As planted separately no severe competition. Plants turned out of Pots as in last page — Now measured to tips of flower-stems

Pot

Crossed

Self

Crossed

 

Selfs

 

 

 

No' of stems

Height No of stems

Height

6 crossed

7

 

8

58 6/

8

60

 

 

 

 

56

 

55 4/

7 crossed

5 3/

 

13

57 6/

3

46 5/

 

 

 

 

58

 

23

8 crossed

6

 

5

50

1

46 6/

 

 

 

 

[excised]

 

45 2/

6 self

 

6 1/

 

[excised]

8

[excised]

7 self

 

6 3/

 

[excised]

3

[excised]

8 self

 

5 1/

 

[excised]

12

[excised]

  

18 3/8

17 7/8

26

 

23

[excised]1/8

 

July 19— 1871. (2 flower-stems measured in each pot.)

(114

Digitalis purpurea (see Port about fertility of first crosses) Seeds. germ. on sand.

Nov. 21. 1869. The crossed plants in most pots are perhaps a shade finer than selfs — now about 5 inches to tips of leaves.

Measured to tips of Leaves, 2 finest plants on each side

Jan. 31 1870

Pot

Crossed

Self

Crossed

 

Self-fert

 

 

 

No' of flower stems

Height of do

No' of stems

Height of do.

2

8 6/8

7 3/8

2

[excised]

1

[excised]

 

7

6

1

[excised]

4

[excised]

 

 

 

6

[excised]

0

[excised]

 

 

 

2

[excised]

0

[excised]

1

7 4/

6 5/

1

[excised]

1

[excised]

 

6 5/

7

1

[excised]

1

[excised]

 

 

 

8.

[excised]

1 (half)

[excised]

3

6 3/

6 5/

4

[excised]

4

[excised]

 

5 5/

6

7

[excised]

0

[excised]

 

 

 

4

[excised]

0

[excised]

 

 

 

1

[excised]

0

[excised]

5

5 6/

7 2/

9

[excised]

2

[excised]

 

6 5/

6 4/

5

[excised]

1

[excised]

 

 

 

(no fl.) but plnt alive.

[excised]

0

[excised]

4

7 4/

5 4/

4

[excised]

0

[excised]

 

6 4/

5 2/

3

[excised]

0

[excised]

 

 

 

6

[excised]

0

[excised]

 

68 1/8 [÷] 10

64 1/8 [÷] 10

64

[excised]

 

 

July 17. 1871. This second measurement was when flower-stems fully grown. The tallest on each plant measured.—

The plant had been turned out of pots into open ground; the balls not being disturbed.— Originally an equal number of plants had been planted; & all survived for a long time when planted out but many of the self were smothered, as soon as flower stems were developed. In Pot 4. all the self- died, but there was dead remnant of an attempted flower stem.— None of crossed died; & all grew magnificently covered with flower & pods.


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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 11 December, 2025