168 HBTEROSTYLED TRIMOBPHIC PLANTS. Chap. IV. 



Twelve mid-styled flowers fertilised illegitimately 

 by their own-form longest stamens yielded 25 per cent. 

 of capsules, which (excluding one with 9 seeds) con- 

 tained on an average 77.5 seeds. 



Twelve mid-styled flowers fertilised illegitimately 

 by their own-form shortest stamens yielded not a single 

 capsule. 



Short-styled form. — Twenty-five flowers fertilised 

 legitimately by the stamens of corresponding length, 

 borne by the long- and mid-styled forms, yielded 73 

 per cent, of capsules, which (excluding one capsule with 

 only nine seeds) contained on an average 70.8 seeds. 



Twenty short-styled flowers fertilised illegitimately 

 by the other stamens of the long- and mid-styled forms 

 yielded only two very poor capsules. 



Twenty short-styled flowers fertilised illegitimately 

 by their own stamens yielded only two poor (or per- 

 haps three) capsules. 



If we take all six legitimate unions together, and 

 all twelve illegitimate unions together, we get the fol- 

 lowing results : — 



Therefore the fertility of the legitimate unions to that 

 of the illegitiftiate, as judged by the proportion of the 

 fertilised flowers which yielded capsules, is as 100 to 

 33 ; and judged by the average number of seeds per 

 capsule, as 100 to 46. 



