Bui. 360, U. S. Dept. of Agriculture. 



Plate I. 



Fig. 1.— Branch of Larix occidentalis Infected with Razoumofskya laricis. 

 The staminate and pistillate plants are ia close juxtaposition, the former at the end of the twig. 



Fig. 2.— Razoumofskya Americana on Pinus contorta. 

 Staminate and pistillate plants; long trailing form. 



