Breeding experiments which show that hybridisation and mutation etc. 2IQ 



difference than this. Great interest therefore attaches to the behaviour 

 -of this new unit-character in inheiitance. That it is a single unit- 

 -character will be shown in the following paragraphs. 



All the differences between rubrinervis and rubricalyx are ob- 

 "vionsly expressions of a single germinal change, namely, in the capacity 



Fig. 4. O. grandiflora grown in England. 



Fig. 5. Buds of 0. grandiflora. 



