Seeds from the crossed plants again crossed, and from the self-fertilised again self-fertilised, produced by the plants in Pot 1 (Table 6/79), in which the three self-fertilised plants were on an average only a little taller than the crossed, were used in the following experiment.  They were kept separate from two similar lots of seeds produced by the two plants in Pot 4 in the same table, in which the crossed plant was much taller than its self-fertilised opponent.

Crossed and self-fertilised plants of the fourth generation (raised from the plants in pot 1, table 6/79).

Crossed and self-fertilised seeds from plants of the last generation in Pot 1 in Table 6/79, were placed on sand, and after germinating, were planted in pairs on the opposite sides of four pots.  The seedlings when in full flower were measured to the base of the calyx.  The remaining seeds were sown crowded on the two sides of Pot 5; and the four tallest plants on each side of this pot were measured in the same manner.

Table 6/80.  Petunia violacea (fourth generation; raised from plants of the third generation in Pot 1, table 6/79).

Heights of plants measured in inches.

Column 1:  Number (Name) of Pot.

Column 2:  Crossed Plants.

Column 3:  Self-fertilised Plants.

Pot 1 :  29 2/8 :  30 2/8. 
Pot 1 :  36 2/8 :  34 6/8. 
Pot 1 :  49 :  31 3/8.

Pot 2 :  33 3/8 :  31 5/8. 
Pot 2 :  37 3/8 :  38 2/8. 
Pot 2 :  56 4/8 :  38 4/8.

Pot 3 :  46 :  45 1/8. 
Pot 3 :  67 2/8 :  45. 
Pot 3 :  54 3/8 :  23 2/8.

Pot 4 :  51 6/8 :  34. 
Pot 4 :  51 7/8 :  0.

Pot 5 :  49 4/8 :  22 3/8. 
Pot 5 :  46 3/8 :  24 2/8. 
Pot 5 :  40 :  24 6/8. 
Pot 5 :  53 :  30. 
Crowded plants.

Total :  701.88 :  453.50.

The fifteen crossed plants average 46.79, and the fourteen (one having died) self-fertilised plants 32.39 inches in height; or as 100 to 69.  So that the crossed plants in this generation had recovered their wonted superiority over the self-fertilised plants; though the parents of the latter in Pot 1, Table 6/79, were a little taller than their crossed opponents.

Crossed and self-fertilised plants of the fourth generation (raised from
the plants in pot 4, table 6/79).

Two similar lots of seeds, obtained from the plants in Pot 4 in Table 6/79, in which the single crossed plant was at first shorter, but ultimately much taller than its self-fertilised opponent, were treated in every way like their brethren of the same generation in the last experiment.  We have in Table 6/81 the measurements of the present plants.  Although the crossed plants greatly exceeded in height the self-fertilised; yet in three out of the five pots a self-fertilised plant flowered before any one of the crossed; in a fourth pot simultaneously; and in a fifth (namely Pot 2) a crossed plant flowered first.