322 



FERTILITY OF CROSSED 



CHAP. IX. 



only six capsules, each containing five seeds. As the 

 number of seeds per capsule is here the same, the fer- 

 tility of the crossed and self-fertilised flowers is given 

 in Table F as equal, or as 100 to 100. But if the 

 flowers which failed to produce capsules be included, 

 the crossed flowers yielded on an average 4*50 seeds, 

 whilst the self-fertilised flowers yielded only 94 seeds, 

 so that their relative fertility would have been as 100 

 to 21. I should here state that it has been found con- 

 venient to reserve for separate discussion the cases of 

 flowers which are usually quite sterile with their own 

 pollen. 



TABLE F. Relative Fertility of the Flowers on the Parent-plants 

 used in my Experiments, when fertilised with Pollen from a 

 distinct Plant and with their own Pollen. Fertility judged of 

 by the average Number of Seeds per Capsule. Fertility of 

 Crossed Flowers taken as 100. 



IPOMCEA PURPUBEA crossed and self-fertilised flowers'! 



yielded seeds as (about) / 



MIMULUS LUTEUS crossed and self-fertilised flowers yielded"! 



seeds as (by weight) J 



LINARIA VULGARIS crossed and self-fertilised flowers') 



yielded seeds as / 



VANDELLIA NUMMULARIFOLIA crossed and self-fertilised") 



flowers yielded seeds as 



GESNERIA PENDULINA crossed and self-fertilised flowers) 



yielded seeds as (by weight) j 



SALVIA COCCINEA crossed and self-fertilised flowers yielded"! 



seeds as (about) / 



BRASSICA OLERACEA crossed and self-fertilised flowers'! 



yielded seeds as J 



ESCHSCHOLTZIA CALIFORNICA (English stock) crossed and"! 



self-fertilised flowers yielded seeds as (by weight) . ./ 

 ESCHSCHOLTZIA CALIFORNICA (Brazilian stock grown in) 



England) crossed and self-fertilised flowers yielded seeds} 



(by weight) as (about) j 



DELPHINIUM CONSOLIDA crossed and self-fertilised flowers) 



(self-fertilised capsules spontaneously produced, b^t result} 



supported by other evidence) yielded seeds as . 



100 to 100 

 > 79 

 14 

 67? 



n ii 100 



100 



25 



n ,, 71 



n n " 



, 58 



