PLATE 13 



J iKjlans calif ornica X Quercus agrifolia 



Fig. 1. — a, leaf and fruits from F seedling No. 13a. 



• Fig. ]. — h, leaf and fruits from F seedling No. 13b. 



Fig. 1. — (;, leaf and fruits from F seedling No. 13c. 



The nuts from which these three F seedlings grew were borne in the 

 same cluster on J. calif ornica tree 1 of 1908 hybridization experiments. 

 X %. 



[58] 



