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UNIVERSITY OF CALIFORNIA EXPERIMENT STATION. 



this sort would develop in one orchard. These trees soon attract atten- 

 tion by their rapidity of growth, great vigor, and failure to produce nuts. 

 Many of them have been dug out or grafted over as soon as their true 

 nature became apparent. The Killian.tr.ee east of El Monte was a 

 notable example of this type, growing in a seedling grove on somewhat 

 sandy land, and one which had been considerably neglected during its 

 earlier years. Under such conditions the trees suffered for water so that 

 they were small and poorly developed for their age. This one tree, how- 



FIG. 15. Two Paradox hybrid walnuts in English walnut grove south of 



El Monte. 



ever, was an enormous, thrifty, vigorous tree, several times as large as 

 any of the others, but producing only a very few nuts and these of no 

 value. The tree^ljas now been grafted over to an English walnut variety. 

 In another orchard southwest of El Monte, on the road from that place 

 to Whittier, may be seen two very large Paradox trees standing in a 

 walnut grove upon decidedly wet land, where the regular English walnut 

 trees are small an.d in poor condition. The Paradox trees are several 

 times larger than tji f e.o,thers and in a very thrifty, healthy condition. 

 These hybrid .trees, therefore, resist both drouth and excess of water 



