CHAP. V. HETEROSTYLED TRIMORPHIC PLANTS. 203 



Nor did I observe any contabescent anthers. It de- 

 serves, also, particular notice that these plants, differ- 

 ently from what occurred in any of the previous classes, 

 consisted of all three forms, namely, eighteen short- 

 styled, fourteen long-styled, and eight mid-styled 

 plants. As these plants were so fertile, I counted the 

 seeds only in the two following cases. 



Plant 32. This mid-styled plant was freely and legitimately 

 fertilised during the unfavourable year of 1864, by numerous 

 surrounding legitimate and illegitimate plants. Eight cap- 

 sules yielded an average of 127 2 seeds, with a maximum of 144 

 and a minimum of 96 ; so that this plant attained 98 per cent. 

 of the normal standard. 



Plant 33. This short-styled plant was fertilised in the same 

 manner and at the same time with the last ; and ten capsules 

 yielded an average of 113 '9, with a maximum of 137 and a 

 minimum of 90. Hence this plant produced no less than 137 

 per cent, of seeds in comparison with the normal standard. 



Concluding Remarks on the Illegitimate Offspring of the 

 three forms of Lythrum salicaria. 



From the three forms occurring in approximately 

 equal numbers in a state of nature, and from the re- 

 sults of sowing seed naturally produced, there is reason 

 to believe that each form, when legitimately fertilised, 

 reproduces all three forms in about equal numbers. 

 Now, we have seen (and the fact is a very singular 

 one) that the fifty-six plants produced from the 

 long-styled form, illegitimately fertilised with pollen 

 from the same form (Class I. and II.), were all long- 

 styled. The short-styled form, when self-fertilised 

 (Class III.), produced eight short-styled and one long- 

 styled plant; and the mid-styled form, similarly treated 

 (Class IV.), produced three mid-styled and one long- 

 gtyled offspring ; so that these two forms, when ille- 



