io6 



LUTHER BURBANK 



Vines were grown from seeds of these new berries that 

 gave fruit earlier than any other known berry; and, still 



Hybrid blackberry leaves. Both from seeds of the same plant. 



more, they continued to bear throughout the summer 

 and were very productive. 



This proved to be an entirely new species of bramble. 

 None like it ever existed before, so Burbank named it 

 "Primus," which means the first. It usually takes many 

 generations of plants to fix a new fruit, but his new berry 

 from the wild Siberian raspberry and the wild dewberry of 

 California, sometimes called the trailing blackberry, was an 

 exception. Many thousands of seeds were planted, and 

 every one came true, bearing Primus berries, proving that 

 the species was fixed. 



