1230 Wisconsin Academy of Sciences, Arts, and Letters. 
EXPLANATION OF PLATE LXXXVII. 
Ustilago levis. 
Fig. 1. Conidia budding to form tree-like structures. 
Fig. 2. Conidia, one and two nucleated, putting out germ-tubes. 
Fig. 3. Conidia from old cultures showing remains of old germ-tubes. 
Figs. 4-6. Germ-tube penetrating the epidermis of young seedling. 
