Cir. 108, Bureau of Plant Industry, U. S. Dept. of Agriculture. 



Plate I. 



■ l .! 





An Old Wood-Oil Tree 30 Feet High in Full Flower in Western Szechwan, 

 China, on the Banks of the Yangtze River. 



(Photographed by Mr. E. II. Wilson, Arnold Arboretum Expedition, 1908.) 



