100 
N. C. AGRICULTURAL EXPERIMENT STATION. 
The mycelium is comparatively large and coarse, varying in diame¬ 
ter from 5.8 /x to 14.5 n with many septa (Fig. 8) which divide each 
mycelial thread into many cells, whose lengths vary with their position 
Fig. 9. —Mycelial thread, showing mode of apical branching. 
Fig. 10. Lettuce leaf, showing stomata and superficial sclerotinia mycelium. 
