52 HETEROSTYLED DIMORPHIC PLANTS. Chap. I. 



Table 13. 



Hottonia palustris (from H. Mutter). 



Nature of Union. 



Long-styled form, by pollen of short-styled. Le 

 gitimate union , 



Long-styled form, by own-form pollen, from a dis 

 tinct plant. Illegitimate union 



Short-styled form, by pollen of long-styled. Le- 

 gitimate union 



Short-styled form, by own-form pollen, from a dis- 

 tinct plant. Illegitimate union 



The two legitimate unions together 



The two illegitimate unions together 



Number 



of Capsules 



examined. 



34 



18 



30 



19 



64 



37 



Average 



Number of 



Seeds per 



Capsu.e. 



91.4 



77.5 



66.2 



18.7 



78.8 

 48.1 



The most remarkable point in this table is the small 

 average number of seeds from the short-styled flowers 

 when illegitimately fertilised, and the unusually large 

 average number of seeds yielded by the illegitimately 

 fertilised long-styled flowers, relatively in both cases to 

 the product of the legitimately fertilised flowers.* The 

 two legitimate unions compared with the two il- 

 legitimate together yield seeds in the ratio of 100 

 to 61. 



H. M tiller also tried the effects of illegitimately fer- 

 tilising the long-styled and short-styled flowers with 

 their own pollen, instead of with that from another 



*H. Miiller says ('Die Be- 

 fruehtung,' &c, p. 352) that the 

 long-styled flowers, when illegiti- 

 mately fertilised, yield as many 

 seeds as when legitimately fer- 

 tilised; but by adding up the 

 number of seeds from all the cap- 

 sules produced by the two methods 

 of fertilisation, as given by him. 



I arrive at the results shown in 

 Table 13. The average number 

 in the long-styled capsules, when 

 legitimately fertilised, is 91.4, 

 and when illegitimately fertilised, 

 77.5 ; or as 100 to 85. H. Miiller 

 agrees with me that this is the 

 proper manner of viewing the 

 case. 



