LUTHER BURBANK 



This was the fruit that was introduced as the 

 Primus berry. 



This highly interesting fruit, one of the first 

 plants of any kind that could properly be termed 

 a new species to be developed under the direct 

 guidance of the hand of the experimenter, was the 

 progeny of a hardy little berry indigenous to Si- 

 beria and Russia, called the Siberian raspberry 

 (Rnbus crataegifolius), and the California dew- 

 berry. 



The little hardy Northern raspberry bore fruit 

 about the size of a pea, of a dark mulberry color, 

 with rather large seeds, and a flavor not such as 

 particularly to commend it. It is, however, re- 

 markable for its large palmate leaves, and the 

 sturdy growth of its stems. 



The California dewberry, Riibus bitifolius, is 

 a trailing vine which is extremely variable in fo- 

 liage, habit of growth, size, and quality of fruit. 

 It is found wild everywhere in the foothills and 

 lower elevations throughout the Pacific slope of 

 the United States, but seems to be at its best in 

 Northern California and Oregon. The berries of 

 this wild species are often produced abundantly. 

 They are black, usually of good size, and of su- 

 perior quality. They are often gathered in large 

 quantities for market and home use. 



The fact that the dewberry bears so-called di- 



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