Nolana prostrata—­crossed and self-fertilised flowers yielded seeds as:  100.

Petunia violacea—­crossed and self-fertilised flowers yielded seeds as (by weight):  67.

Nicotiana tabacum—­crossed and self-fertilised flowers yielded seeds as (by weight):  150.

Cyclamen persicum—­crossed and self-fertilised flowers yielded seeds as:  38.

Anagallis collina—­crossed and self-fertilised flowers yielded seeds as:  96.

Canna warscewiczi—­crossed and self-fertilised flowers (on three generations of crossed and self-fertilised plants taken all together) yielded seeds as:  85.

Table 9/G gives the relative fertility of flowers on crossed plants again cross-fertilised, and of flowers on self-fertilised plants again self-fertilised, either in the first or in a later generation.  Here two causes combine to diminish the fertility of the self-fertilised flowers; namely, the lesser efficacy of pollen from the same flower, and the innate lessened fertility of plants derived from self-fertilised seeds, which as we have seen in the previous Table 9/D is strongly marked.  The fertility was determined in the same manner as in Table 9/F, that is, by the average number of seeds per capsule; and the same remarks as before, with respect to the different proportion of flowers which set capsules when they are cross-fertilised and self-fertilised, are here likewise applicable.

Table 9/G.—­Relative fertility of flowers on crossed and self-fertilised plants of the first or some succeeding generation; the former being again fertilised with pollen from A distinct plant, and the latter again with their own pollen.  Fertility judged of by the average number of seeds per capsule.  Fertility of crossed flowers taken as 100.

Column 1:  Name of plant and feature observed.

Column 2:  x, in the expression, 100 to x.

Ipomoea purpurea—­crossed and self-fertilised flowers on the crossed and self-fertilised plants of the first generation yielded seeds as:  93.

Ipomoea purpurea—­crossed and self-fertilised flowers on the crossed and self-fertilised plants of the 3rd generation yielded seeds as:  94.

Ipomoea purpurea—­crossed and self-fertilised flowers on the crossed and self-fertilised plants of the 4th generation yielded seeds as:  94.

Ipomoea purpurea—­crossed and self-fertilised flowers on the crossed and self-fertilised plants of the 5th generation yielded seeds as:  107.

Mimulus luteus—­crossed and self-fertilised flowers on the crossed and self-fertilised plants of the 3rd generation yielded seeds as (by weight):  65.