158 HETEROSTYLED TRIMORPHIC PLANTS. Chap. IV. 



Twelve mid-styled flowers fertilised illegitimately 

 by their own-form Jongest 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 72 

 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 : — 



Table 26. 



Nature of Union. 



Number 



of 

 Flowers 



fertilised. 



Number 



of 

 Capsules 

 produced. 



Average 



Number of 



Seeds per 



Capau.e. 



Average Num- 

 ber of Seeds 

 per Flower 



fertilised. 



The six legitimate ) 



75 



56 



96.29 



71.89 



The twelve illegitimate ) 



146 



36 



44.72 



11.03 



Therefore the fertility of the legitimate unions to that 

 of the illegitimate, 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. 



