CROSSED AND SELF-FERTILISED PLANTS OF THE SEVENTH GENERATION.
These were raised as heretofore with the following result:—
TABLE 2/8. Ipomoea purpurea (Seventh Generation).
Heights of Plants in inches:
Column 1: Number (Name) of Pot.
Column 2: Crossed Plants.
Column 3: Self-fertilised Plants.
Pot 1 : 84 4/8 : 74 6/8. Pot 1 : 84 6/8 : 84. Pot 1 : 76 2/8 : 55 4/8.
Pot 2 : 84 4/8 : 65. Pot 2 : 90 : 51 2/8. Pot 2 : 82 2/8 : 80 4/8.
Pot 3 : 83 : 67 6/8. Pot 3 : 86 : 60 2/8.
Pot 4 : 84 2/8 : 75 2/8.
Total : 755.50 : 614.25.
Each of these nine crossed plants is higher than its opponent, though in one case only by three-quarters of an inch. Their average height is 83.94 inches, and that of the self-fertilised plants 68.25, or as 100 to 81. These plants, after growing to their full height, became very unhealthy and infested with aphides, just when the seeds were setting, so that many of the capsules failed, and nothing can be said on their relative fertility.