SLA CKBERR T-DE WBERR Y 



325 



Fig. 61. Snyder. Rubus nigrobaccus var. sativus. 



More or less commonly associated with the two parent species, 

 at least in New York and Pennsylvania. 



At first sight this type appears like a variety of B. nigrobaccus, 

 but it is apparently found only where both E. nigrobaccus and 

 B. villosus are growing. This, with its habit of occasionally 

 rooting at the tips, and the fact that various gradations between 

 the two species often occur, seems to be convincing proof of its 

 hybrid origin. The type occupies the same ground between the 

 blackberry and dewberry that B. neglectus does between the 

 black and red raspberry. In cultivation it is represented by the 

 Wilson, Wilson Jr., Thompson Early Mammoth, and others. 

 This plant was in cultivation in Europe early in the century, and 

 was called Bubus heterophyllus by Willdenow. 



