26 



HETEROSTYLED DIMORPHIC PLANTS. CHAP. I. 



proportional weight of seeds than do the flowers of the 

 long-styled when fertilised with pollen from a distinct 

 plant of the same form. So it is with the short-styled 

 flowers, if treated in an analogous manner. Therefore I 

 have called the former method of fertilisation a legiti- 

 mate union and the latter, as it fails to yield the full 

 complement of capsules and seeds, an illegitimate 

 union. These two kinds of union are graphically 

 represented in Fig. 2. 



TABLE 7. 



If we consider the results of the two legitimate 

 unions taken together and the two illegitimate ones, 

 as shown in Table 7, we see that the former com- 

 pared with the latter yielded capsules, whether con- 

 taining many seeds or only a few, in the proportion of 

 77 to 45, or as 100 to 58. But the inferiority of the 

 illegitimate unions is here perhaps too great, for on a 

 subsequent occasion 100 long-styled and short-styled 

 flowers were illegitimately fertilised, and they together 

 yielded 53 capsules: therefore the rate of 77 to 53, or 

 as 100 to 69, is a fairer one than that of 100 to 58. 

 Eeturning to Table 7, if we consider only the good 

 capsules, those from the two legitimate unions were to 

 those from the two illegitimate in number as 71 to 31, 

 or as 100 to 44. Again, if we take an equal number of 



