The mean height of the flower-stems of the two crossed plants in Pots 1 and 2 is here 34.75 inches, and that of the two self-fertilised plants in the same pots 44.25 inches; or as 100 to 127. The self-fertilised plants in Pots 3 and 4 were in every respect very much finer than the crossed plants. I was so much surprised at this great superiority of the self-fertilised over the crossed plants, that I determined to try how they would behave in one of the pots during a second growth. The two plants, therefore, in Pot 1 were cut down, and repotted without being disturbed in a much larger pot. In the following year the self-fertilised plant showed even a greater superiority than before; for the two tallest flower-stems produced by the one crossed plant were only 29 4/8 and 30 1/8 inches in height, whereas the two tallest stems on the one self-fertilised plant were 49 4/8 and 49 6/8 inches; and this gives a ratio of 100 to 167. Considering all the evidence, there can be no doubt that these self-fertilised plants had a great superiority over the crossed plants. CROSSED AND SELF-FERTILISED PLANTS OF THE SECOND GENERATION. TABLE 5/71. Lobelia fulgens (Second Generation). Heights of flower-stems measured in inches. Column 1: Number (Name) of Pot. Column 2: Crossed Plants. Column 3: Self-fertilised Plants. Pot 1 : 27 3/8 : 32 3/8. Pot 1 : 26 : 26 3/8. Pot 1 : 24 3/8 : 25 1/8. Pot 1 : 24 4/8 : 26 2/8. Pot 2 : 34 : 36 2/8. Pot 2 : 26 6/8 : 28 6/8. Pot 2 : 25 1/8 : 30 1/8. Pot 2 : 26 : 32 2/8. Pot 3 : 40 4/8 : 30 4/8. Pot 3 : 37 5/8 : 28 2/8. Pot 3 : 32 1/8 : 23. Pot 4 : 34 5/8 : 29 4/8. Pot 4 : 32 2/8 : 28 3/8. Pot 4 : 29 3/8 : 26. Pot 4 : 27 1/8 : 25 2/8. Pot 5 : 28 1/8 : 29. Pot 5 : 27 : 24 6/8. Pot 5 : 25 3/8 : 23 2/8. Pot 5 : 24 3/8 : 24. Pot 6 : 33 5/8 : 44 2/8. Pot 6 : 32 : 37 6/8. Pot 6 : 26 1/8 : 37. Pot 6 : 25 : 35. Pot 7 : 30 6/8 : 27 2/8. Pot 7 : 30 3/8 : 19 2/8. Pot 7 : 29 2/8 : 21. Pot 8 : 39 3/8 : 23 1/8. Pot 8 : 37 2/8 : 23 4/8. Pot 8 : 36 : 25 4/8. Pot 8 : 36 : 25 1/8. Pot 9 : 33 3/8 : 19 3/8. Pot 9 : 25 : 16 3/8. Pot 9 : 25 3/8 : 19. Pot 9 : 21 7/8 : 18 6/8. Total : 1014.00 : 921.63.