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Darwin, Charles, 1809-1882

"Effects of Cross and Self Fertilisation in the Vegetable Kingdom"


Column 2: Crossed Plants.
Column 3: Self-fertilised Plants.
Pot 1 : 41 4/8 : 40 6/8.
Pot 1 : 48 : 39.
Pot 1 : 36 : 48.
Pot 2 : 36 : 47.
Pot 2 : 21 : 80 2/8.
Pot 2 : 36 2/8 : 86 2/8.
Pot 3 : 52 : 46.
Pot 4 : 57 : 43 6/8.
Total : 327.75 : 431.00.
The eight crossed plants now averaged 40.96, and the eight
self-fertilised plants 53.87 inches in height, or as 100 to 131; and
this excess chiefly depended, as already stated, on the unusual tallness
of two of the self-fertilised plants in Pot 2. The self-fertilised had
therefore lost some of their former great superiority over the crossed
plants. In three of the pots the self-fertilised plants flowered first;
but in Pot 3 at the same time with the crossed.
The case is rendered the more strange, because the crossed plants in the
fifth pot (not included in the two last tables), in which all the
remaining seeds had been thickly sown, were from the first finer plants
than the self-fertilised, and had larger leaves. At the period when the
two tallest crossed plants in this pot were 6 4/8 and 4 5/8 inches high,
the two tallest self-fertilised were only 4 inches. When the two crossed
plants were 12 and 10 inches high, the two self-fertilised were only 8
inches. These latter plants, as well as many others on the same side of
this pot never grew any higher, whereas several of the crossed plants
grew to the height of two feet! On account of this great superiority of
the crossed plants, the plants on neither side of this pot have been
included in the two last tables.


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