Chap. III. 



PULMONAEIA ANGTJSTIFOLIA. 



107 



bility of all the organs in both forms, we may perhaps 

 suspect that the plant is undergoing a change, and 

 tending to become dioecious. 



My son collected in the Isle of Wight on two occa- 

 sions 202 plants, of which 125 were long-styled and 

 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 angusiifolia. 



