PLATE 11 



Juglans californica var. quercina Babcock 



Fig. 17. — Abnormal late catkins from the Leffingwell tree; a, normal 

 catkin bearing one young fruit and with an abnormal catkin growing 

 from its base; b, c, d, abnormal catkins and leaves. X %. 



Fig. 18. — Two seedlings from Juglans californica tree No. 16 (Garden 

 Grove), March, 1913; a, typical of the species; h, quercina form. X %. 



[44] 



