Table 3/19.  Mimulus luteus.

Heights of Plants in inches: 

Column 1:  Number (Name) of Pot.

Column 2:  Intercrossed Plants from Self-fertilised Plants of the Sixth
Generation.

Column 3:  Self-fertilised Plants of the Seventh Generation.

Pot 1 :  12 6/8 :  15 2/8. 
Pot 1 :  10 4/8 :  11 5/8. 
Pot 1 :  10 :  11. 
Pot 1 :  14 5/8 :  11.

Pot 2 :  10 2/8 :  11 3/8. 
Pot 2 :  7 6/8 :  11 4/8. 
Pot 2 :  12 1/8 :  8 5/8. 
Pot 2 :  7 :  14 3/8.

Pot 3 :  13 5/8 :  10 3/8. 
Pot 3 :  12 2/8 :  11 6/8.

Pot 4 :  7 1/8 :  14 6/8. 
Pot 4 :  8 2/8 :  7. 
Pot 4 :  7 2/8 :  8.

Pot 5 :  8 5/8 :  10 2/8
Pot 5 :  9 :  9 3/8. 
Pot 5 :  8 2/8 :  9 2/8. 
Crowded.

Total :  159.38 :  175.50.

The average height of the sixteen intercrossed plants is here 9.96 inches, and that of the sixteen self-fertilised plants 10.96, or as 100 to 110; so that the intercrossed plants, the progenitors of which had been self-fertilised for the six previous generations, and had been exposed during the whole time to remarkably uniform conditions, were somewhat inferior in height to the plants of the seventh self-fertilised generation.  But as we shall presently see that a similar experiment made after two additional generations of self-fertilisation gave a different result, I know not how far to trust the present one.  In three of the five pots in Table 3/19 a self-fertilised plant flowered first, and in the other two a crossed plant.  These self-fertilised plants were remarkably fertile, for twenty flowers fertilised with their own pollen produced no less than nineteen very fine capsules!

The effects of A cross with A distinct stock.

Some flowers on the self-fertilised plants in Pot 4 in Table 3/19 were fertilised with their own pollen, and plants of the eighth self-fertilised generation were thus raised, merely to serve as parents in the following experiment.  Several flowers on these plants were allowed to fertilise themselves spontaneously (insects being of course excluded), and the plants raised from these seeds formed the ninth self-fertilised generation; they consisted wholly of the tall white variety with crimson blotches.  Other flowers on the same plants of the eighth self-fertilised generation were crossed with pollen taken from another plant of the same lot; so that the seedlings thus raised were the offspring of eight previous generations of self-fertilisation with an intercross in the last generation; these I will call the intercrossed plants.  Lastly, other flowers on the same plants of the eighth self-fertilised generation were crossed with pollen taken from plants which had been raised from seed procured from a garden at Chelsea.  The Chelsea plants bore yellow flowers blotched with