BIOLOGIC SPECIALIZATION IN THE GENUS SEPTORIA 33 
Fig. 6. Disease spots of S. malvicola upon Althaea rosea. Inoculated with spores 
from Malva rotundifolia. 
Fig. 7. Disease spots of S. lactucicola E. & M. upon Lactuca scariola. Inoculated 
with spores from L. canadensis. 
Fig. 8. Disease spot of S. lactucicola upon Lactuca saliva. Inoculated with spores 
from L. canadensis. 
Fig. 9. Disease spots of S. lactucicola upon Lactuca canadensis. Natural infection. 
