CHAP. V. HETEROSTYLED DIMORPHIC PLANTS. 231 



contained pollen, with which I succeeded in fertilising 

 some flowers on the illegitimate long-styled plants 

 immediately to be described. Four flowers on this 

 same short-styled plant were likewise legitimately fer- 

 tilised with pollen from one of the following long- 

 styled plants; but only one capsule was produced, con- 

 taining 26 seeds; and this is a very low number for a 

 legitimate union. 



With respect to the five illegitimate long-styled 

 plants of the first generation, derived from the above 

 self-fertilised short-styled and long-styled parents, 

 their fertility was observed during the same three 

 years. These five plants, when self-fertilised, differed 

 considerably from one another in their degree of 

 fertility, as was the case with the illegitimate long- 

 styled plants of Lythrum salicaria; and their fertility 

 varied much according to the season. I may premise, 

 as a standard of comparison, that during the same 

 years 56 flowers on legitimate long-styled plants of 

 the same age and grown in the same soil, were fer- 

 tilised with their own pollen, and yielded 27 capsules; 

 that is, 48 per cent. On one of the five illegitimate 

 long-styled plants 36 flowers were self -fertilised in 

 the course of the three years, but they did not produce 

 a single capsule. Many of the anthers on this plant 

 were contabescent : but some seemed to contain 

 sound pollen. Nor were the female organs quite 

 impotent; for I obtained from a legitimate cross one 

 capsule with good seed. On a second illegitimate 

 long-styled plant 44 flowers were fertilised during the 

 same years with their own pollen, but they produced 

 only a single capsule. The third and fourth plants 

 were in a very slight degree more productive. The 

 fifth and last plant was decidedly more fertile; for 

 42 self -fertilised flowers yielded 11 capsules. Alto- 



