(Vor. 1, 1914] 
262 ANNALS OF THE MISSOURI BOTANICAL GARDEN 
EXPLANATION OF PLATE 
PLATE 9 
Trunk disease of the lilac due to Polyporus versicolor 
Fra. 1. Sections of three diseased trunks showing early stages of the disease. 
Fra. 2. Sections showing progressive stages of the lilac trunk disease. 
