RECORD: Darwin, C. R. n.d. Vandellia / Crossed / Proof sheets of Insectivorous plants, pp. 94 & 95. CUL-DAR77.73-81. (John van Wyhe ed., 2002-. The Complete Work of Charles Darwin Online, http://darwin-online.org.uk/)

REVISION HISTORY: Text prepared and edited by John van Wyhe. RN1

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).


73

Vandellia num:    Aug 18. 75

Pot V

 

Crossed           Self

2 1/2    1 7/8

3          2 5/8 ✔

2 7/8    2 1/2

2 5/8    2 11/16 5/8 ✔

1 7/8 (5 Plants)

2 7/8 ✔

4 tallest

2 7/8 ✔    4 tallest

            2

            2

            2 2/8

             (9 Plants)

 

Total number of Plants measured

 

(I)        18        12

(II)       9          5

III        6          6

(III) IV            11        9

            5          9

            49        41

73v

Vandellia Aug 1875 

Self Fert          Crossed

all the pots added together     all the pots added together

800 - 80 + 7 + 4/10

1000 + 90 + 3/10

grains grains

887.4   1090.3

 

 

(N.B the number of plants ought to counted)

 

49 crossed plant: 41self-fert plants: 1090gr.3: X weight of 41 crossed plants

1090.3 [x] 41 (÷* 49 =) 912.2918

 

912gr.3: 887.4 :: 100 X 97.27

Weight 887.40 [÷] 912.3 [=] 97.2.7

100 to 97

74

Black Thred    Vandellia — Perfect flowers self-fertilised — March 30— 1875

   9/12 set

52 [+] 47 [+] 49 52137 — Maximum [+] 46 [+] 104 [+] 115 [+] 111 [+] 84 [+] 87 [+] 68 [=] 804 [÷] 9 [=] 89.33

90 [+] 47 [=] 137

65 [+] 39 [=] 104

55 [+] 60 [=] 115

59 [+] 52 [=] 111

   Wonderfully same fertility

 

White Tread Vandellia    Crosses by other Plant

   7/9 set

63. [+] 82. [+] 49 [+] 135 — Maximum [+] 115 [+] 55 [+] 127 [=] 626 [÷] 7 [=] 89.43

(March 1875)

83 [+] 52 [=] 135

55 [+] 60 [=] 115

69 [+] 58 [=] 127

 

29.15 [x] 6 [=] 174.90    5

75

Seeds from crossed perfect flowers                Seeds from perfect self-fert flowers

804 —             9  7 pods

626 —             7

97        3          175      6

37                               

84                               

132 max (137)                         (max 135)       

129      4                     

111                             

96                               

  1490 [÷] 16 [=] 931 4 places

801 [÷] 13 [=] 616 3 places               

 

 

62.0000 [÷] 93 [=] 666 = (17 67)

76

Height Ratio of selected plants Vandellia

 

86.3inchs Crossed: 81.12.000inches Self :: 100: X

8112 [÷] 863 [=] 939.9

(94) (94 is right)    375 [÷] 25 [=] 125

 

 

8112 [÷] 863 [=] 9    43.15 35.9    43.15 [÷] 12 [=] 3.5958

 

3.38000 self-fertil average Height [÷] 3.60 Crossed Plant average Height [=] 95.2

 

1127 [÷] 12 [=] 93.9

(Used)

77

Vandellia num: Aug. 18', 1875— Plants from seed of crossed perfect flowers & from self-fertilised (by aid) perfect flowers. These plants this year have produced no perfect, but innumerable cleistogam flowers

 

 

Crossed Plants

Pot I

2in. 7/8 [+] 1. 1/2 [+] 2. 5/8 [+] 3 1/8 ✔ [+] 3. ✔ [+] 3 5/16 ✔ [+] 2 5/8 [+] 3. 5/16 ✔ [+] 2. 3/8 [+] 2. 7/8 [+] 3 ✔ [+] 2 1/2 [+] 2. 7/8 3 [+] 2 13/16 [+] 2 7/16 [+] 2 3/16 [+] 2 3/16 [+] 2 7/16 [+] 2. 3/8 [+] 1 7/8 [+] 1 5/8 [+] 1 3/8

Corresp

2.14 [+] 2.10 [+] 3.2 [+] 3 [+] 3.5 [+] 2.10 [+] 3.5 [+] 2.6 [+] 2.14 [+] 3 [+] 2.8 [+] 3 [+] 2.13 [+] 2.7 [+] 2.3 [+] 2.3 [+] 2.7 [+] 2.6

[=] 49 1/16 [÷] 18

49.06 [÷] 18 [=] 2.726

(18 Plants) 113 [÷] 16 [=] 7

 

Self-fertilised Plants

Pot I

2 3/8 [+] 2. 7/8 ✔ [+] 2 1/4=4.16 [+] 2 1/8 [+] 2 6/8 ✔ [+] 3 2/8 ✔ [+] 2 7/8 ✔ [+] 2 5/8 [+] 2 4/8 [+] 3 2/8 ✔ [+] 2 2/8 [+] 2 1/8

2.6 [+] 2.14 [+] 2.4 [+] 2.2 [+] 2.12 [+] 3.4 [+] 2.14 [+] 2.10 [+] 2.8 [+] 3.4 [+] 2.4 [+] 2.2

33.0 [÷] 12

31.25 [÷] 12 [=] 2.604

84 [÷] 12

31    5

29    84

84 [÷] 16 [=] 5

/ 12 Plants

For weight see back of No V

(To see whether crowding does Harm)

78

Vandellia num: Aug 18 /75—

Pot IV

 

Crossed      Self

3 3/4 ✔

4 ✔

3 3/4 ✔

4 1/16 ✔

3 9/16 ✔

3 3/4 ✔

3 3/8 (✔)

2 3/8

3 9/16 3 9/16 ✔

3 14/16 ✔

3 2/8

3 9/16 ✔

4 ✔

3 5/16 2 11.16

3 3/8    2 15/16

3         

2 3/16

(11 Plants)       (9 Plants)

79

Vandellia num. August 18th. 1875

Crossed Plants            Self fertilised Plants

Pot III Pot III

4 1/2 ✔

3 13/16 ✔

4 7/16 ✔

2 9/16

3 3/8 ✔

3 3/4 ✔

3 2/8    3 1/2 ✔

4 7/16 ✔

3 1/8 ✔

4 1/2 ✔

3 2/8 ✔

(6 Plants)         (6 Plants)

80

Vandellia num. August 18th. 1875

Crossed plants.            Self fertilised plants

Pot II   Pot II

3. 6/8 ✔ 12/16

4 ✔

3. 5/16             3 3/16 ✔

3 2/8    3 13/16 ✔

4 3/16 ✔

3 3/16 ✔

3 9/16 

4 1/8 ✔

3 6/8 ✔ 12

2 3/4

3 6/8 ✔ 12

2 15/16

3 5/8 ✔ 10

3 1/8

3 15/16 ✔

         

(9 Plants)         (8 Plants)

81

6 Crossed Plan            Plants 6 Self-fertilised Plants

Six of finest plants were selected → do

63 [+] 61 [+] 47 [+] 60 [+] 30 [+] 35 [+] 25 [+] 90 [+] 53 [+] 25 [+] 54 [+] 25 [+] 15 [+] 15 [=] 598        
35 [+] 50 [+] 30 [+] 60 [+] 38 [+] 60 [+] 20 [+] 65 [+] 35 [+] 40 [+] 45 [+] 65 [+] 26 [+] 23 [+] 27 [+] 45 [+] 50 [+] 23 [+] 15 [=] 752

On this side many seeds-pods look finer but by many much smaller.

6

(Vandellia)

   18 [x] 5 [=] 90


Return to homepage

Citation: John van Wyhe, ed. 2002-. The Complete Work of Charles Darwin Online. (http://darwin-online.org.uk/)

File last updated 1 December, 2025