PLATE 10 



Fig. 15. — a, Abnormal leaf on a second-growth lateral brancblet on 

 Juglans calif ornica, Brea Canon. ]909; b, a typical leaf from the Leffing- 

 well quercina tree. X %. 



Fig. 16. — One of the three original quercina trees at N. B. Pierce's 

 gardens in Santa Ana, 1913. 



[42] 



