equal state of germination in seven pots, each made tripartite by three
superficial partitions. Some of the remaining seeds, whether or not in a
state of germination, were thickly sown in an eighth pot. The pots were
kept in the greenhouse, and the plants trained up sticks. They were
first measured to the tops of their stems when coming into flower; and
the twenty-two Westerham-crossed plants then averaged 25.51 inches; the
twenty-three intercrossed plants 30.38; and the twenty-three
self-fertilised plants 23.40 inches in height. We thus get the following
ratios:--

The Westerham-crossed plants in height to the self-fertilised as 100 to
91.

The Westerham-crossed plants in height to the intercrossed as 100 to
119.

The intercrossed plants in height to the self-fertilised as 100 to 77.

These plants were again measured when their growth appeared on a casual
inspection to be complete. But in this I was mistaken, for after cutting
them down, I found that the summits of the stems of the
Westerham-crossed plants were still growing vigorously; whilst the
intercrossed had almost, and the self-fertilised had quite completed
their growth. Therefore I do not doubt, if the three lots had been left
to grow for another month, that the ratios would have been somewhat
different from those deduced from the measurements in Table 6/82.

TABLE 6/82. Petunia violacea.

Heights of plants measured in inches.