LUTHER BURBANK 



was still further accentuated in the next genera- 

 tion, when I used as hybridizing agent H. Reginea, 

 which, it will be recalled, was one of the original 

 parents of H. Johnsoni. 



Thus, having started with a hybrid, I had pro- 

 duced three additional generations of hybrids, in 

 which the parent forms were used and a different 

 species added, so that my fourth-generation by 

 brids had the strains of three species curiously 

 blended. 



Persons who care for matters of genealogy 

 might find it of interest to attempt to unravel the 

 pedigrees of these fourth-generation hybrids 

 which had for one parent the species H. reginae 

 and for the other a hybrid whose parents were 

 born of a union of H. aulicum and a hybrid of H. 

 Johnsoni and H. vittatum; recalling that H. John- 

 soni itself is the offspring of the progenitors of H. 

 reginae and H. vittatum. The questions of cousin- 

 ship involved in such a union are much too com- 

 plex to interest anyone but the antiquarian. 



At all events they need not be untangled by 

 the plant developer. For him it suffices to recall 

 the names and characteristics of the various 

 species and to concern himself with such selections 

 among their offspring as will produce races 

 blending these characteristics in new and desir- 

 able combinations. 



[86] 



