Chap. I. 



PRIMULA SINENSIS. 



39 



before the short-styled. When both forms were legiti- 

 mately fertilised, the capsules from the short-styled 

 plants contained, on an average, more seeds than those 

 from the long-styled, in the ratio of 12.2 to 9.3 by 

 weight, that is, as 100 to 78. In the following table 

 we have the results of two sets of experiments tried 

 at different periods: 



Table 10. 



Primula Sinensis. 



Nature of Union. 



Number 



of 

 Flower* 



fertilised. 



Number 

 of good 



Capsules 

 produced. 



Average 

 Weight of 



Seeds per 

 Capsule, 



Average Number 

 of Seeds per 



Capsule, mm 

 ascertained on a 



subsequent 

 occasion. 



Long-styled form, by pollen ) 

 of short-styled. Legiti- > 



24 



16 



0.58 



50 



Long-styled form, by own- 1 

 form pollen. Illegitimate > 



20 



13 



* 



0.45 



35 



Short-styled form, by pollen ] 

 of long-styled. Legitimate \ 



8 



8 



0.76 



■ 



64 



Short-styled form, by own- ) 

 form pollen. Illegitimate > 



7 



4 



0.23 



25 



The two legitimate unions ) 



32 



24 



0.64 



57 



The two illegitimate unions ( 



27 



17 



0.40 



30 



The fertility, therefore, of the two legitimate unions 

 together to that of the two illegitimate unions, as judged 

 by the proportional number of flowers which yielded 

 capsules, is as 100 to 84. Judging by the average 

 weight of seeds per capsule produced by the two kinds 

 of unions, the ratio is as 100 to 63. On another occa- 

 sion a large number of flowers of both forms were 



5 





