Chap. III. PULMONARIA ANGUSTIFOLIA. 



107 



77 short-styled; so that the former were the more 

 numerous. On the other hand, out of 18 plants raised 

 by me from seed, only 4 were long-styled and 14 

 short-styled. The short-styled plants seemed to my 

 son to produce a greater number of flowers than the 

 long-styled; and he came to this conclusion before a 

 similar statement had been published by Hildebrand 

 with respect to P. officinalis. My son gathered ten 

 branches from ten different plants of both forms, and 

 found the number of flowers of the two forms to be as 

 100 to 89, 190 being short-styled and 169 long-styled. 

 With P. officinalis the difference, according to Hilde- 

 brand, is even greater, namely, as 100 flowers for the 

 short-styled to 77 for the long-styled plants. The 

 following table shows the results of my experi- 

 ments : — 



Table 20. 



Pulmonaria angustifolia. 



Nature of Union- 



Number 



of 

 Flowers 

 fertilised. 



Long-styled flowers, by pollen of short- ) 

 styled. Legitimate union j 



Long-styled flowery by own-form pollen. ! 

 Illegitimate union j 



Short-styled flowers, by pollen of long- 

 __ styled. Legitimate union 



Short-styled flowers, by own-form pollen. 

 Illegitimate union 



18 



18 



18 



12 



Number 



of 



Fruits 



produced. 



9 



Average 



Number of 



Seeds per 



Fruit. 



2.11 







15 







2.60 



1.86 



We see in this table that the fertility of the two 

 legitimate unions to that of the two illegitimate to- 

 gether is as 100 to 35, judged by the proportion of 

 flowers which produced fruit: and as 100 to 32, judged 

 by the average number of seeds per fruit. But the 

 small number of fruit yielded by the 18 long-styled 



