Breeding experiments which show that hybridisation and mutation etc. 2^3 



In pubescence, the stems and buds of ruhricalyx x grandiflora 

 and its reciprocal are also intermediate; i. e., the short t^'pe of hair 

 is present, and in addition the long muricate type, though in much 

 reduced numbers. This is in accord with the results of Macfarlane 

 (1895) who, in his careful study, found the number of hairs per given 

 area reduced to a half in several crosses between pubescent and non- 

 pubescent forms. He also found in certain crosses that the size of 



Fig. 14. F|, rubricnlyx x grandißora. 



the individual hairs was reduced to half while th.e number remained 

 the same. 



The buds of the Fi h.ybrid are also intermediate, being distinctly 

 squarish in shape, with thicker sepals and stouter hypanthium than 

 grandiflora. The buds of the reciprocal crosses were exactly alike. 

 In general habit the ruhricalyx •; grandiflora plants were very uniform, 

 all having a pyramidal shape resembling ruhricalyx but with longer 



