LUTHER BURBANK 



The variation is best explained by assuming 

 that this strawberry is itself a natural hybrid. 



Another California strawberry that has interest 

 is the wood strawberry, Fragaria Calif ornica, a 

 plant that usually has small leaves, rather upright 

 in growth, and producing fruit abundantly, though 

 the fruit itself is insipid and hardly worth gath- 

 ering. 



This plant also varies widely in diiferent locali- 

 ties. In the Yosemite Valley I found a most 

 astonishing variation in these as well as in other 

 strawberries. Some of the wild varieties growing 

 there were fully equal to the cultivated strawberry, 

 while others were insignificant to the last degree. 



Some of the plants grew strictly upright; others 

 had leaves that hugged the ground and spread in 

 all directions. There was a wide range of variation 

 as to form, size, foliage and fruit. This was quite 

 the most interesting group of strawberries that I 

 have come across anywhere. But these plants do 

 not seem to thrive in the valleys as they do in 

 their mountain home. 



As to the latter point, I have noticed a striking 

 propensity on the part of certain strawberries to 

 degenerate when placed under changed conditions 

 of soil and climate. 



We have seen that plums and many other 

 plants are stimulated to exceptional growth by 



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