Some of the remaining seeds of both series, whether or not in a state of germination, were thickly sown on the opposite sides of two very large pots; and the six highest plants on each side of each pot were measured after they had grown to nearly their full height. But their heights were much less than in the former trials, owing to their extremely crowded condition. Even whilst quite young, the crossed seedlings manifestly had much broader and finer leaves than the self-fertilised seedlings.
TABLE 6/89. Nicotiana tabacum. Plants of the same parentage as those in Table 6/88, but grown extremely crowded in two large pots.
Heights of plants measured in inches.
Column 1: Kew-crossed Plants, from pot 2, Table 6/87.
Column 2: Plants of the fourth Self-fertilised generation, from pot 2, Table 6/87.
Column 3: Kew-crossed Plants, from pot 5, Table 6/87.
Column 4: Plants of the fourth Self-fertilised generation, from pot 5, Table 6/87.
42 4/8 : 22 4/8 : 44 6/8 : 22 4/8.
34 : 19 2/8 : 42 4/8 : 21.
30 4/8 : 14 2/8 : 27 4/8 : 18.
23 4/8 : 16 : 31 2/8 : 15 2/8.
26 6/8 : 13 4/8 : 32 : 13 5/8.
18 3/8 : 16 : 24 6/8 : 14 6/8.
175.63 : 101.50 : 202.75 : 105.13.
The twelve tallest crossed plants in the two pots belonging to the two series average here 31.53, and the twelve tallest self-fertilised plants 17.21 inches in height; or as 100 to 54. The plants on both sides, when fully grown, some time after they had been measured, were cut down close to the ground and weighed. The twelve crossed plants weighed 21.25 ounces; and the twelve self-fertilised plants only 7.83 ounces; or in weight as 100 to 37.