104 



Mycologia 



has been found in Connecticut, Pennsylvania, Maryland, and 

 Virginia. 



" Large leaf-spot of chestnut and oak," by A. H. Graves. A 

 new leaf-spot, different from the common one caused by Septoria 

 ochroleuca, has been found on chestnut and red oak in the entire 

 south Appalachian region and also in Delaware. The spots, 

 which begin to appear in August, are often an inch or more in 

 diameter, and show concentric rings. Forty per cent, of the 

 leaves are killed at times. Professor Farlow thinks the fungus 

 is Monochaetia Desmazierii Sacc. 



" Notes on Cronartium ribicola/' by P. Spaulding. The teleu- 

 tospores develop in the cool weather of autumn. Inoculations 

 have been successfully made through the different hosts. No 

 single inspection will remove all infected trees. If this disease 

 is present, it will save expense to destroy all affected trees at 

 once. 



"An edible smut," by Mrs. Flora W. Patterson. Under this 

 title, Ustilago esculenta P. Henn., on Zizania latifolia, was 

 exhibited and described. Corn smut is used in large quantities 

 in Mexico City as an article of food. A smut on sorghum is 

 also edible.. 



" The potato Fusarium situation in Europe and America," by 

 W. A. Orton. The speaker described three diseases involved: a 

 wilt due to a species of Verticillium, a wilt due to Fusarium 

 oxysporium, and another disease apparently physiological and 

 very imperfectly known. 



The method of distribution of the olive knot disease," by 

 Horne, Parker, and Daines. Experiments were conducted at 

 Fair Oaks, California. Slime from knots caused new knots on 

 inoculation. The causative organism is Bacterium Savastanoi 

 E. F. Smith. It is distributed on the feet of birds, and may enter 

 leaf-scars, cracks, wound callouses, and other rough places on the 

 trunk. Smooth-barked varieties are therefore less subject to the 

 disease. 



" Notes on some diseased trees in our national forests," by G. 

 G. Hedgcock. Large additions were made to the hosts and dis- 

 tribution of many of the larger tree-destroying fungi, such as 

 Inonotus dryophilus, I. texanus, Pyropolyporus Everhartii, P. 



