xviii Report of the Botanist. 



troubles and diseases to which shade trees are subject, especially in 

 cities. A great amount of interesting and important information 

 has been gained which we hope to present for a future bulletin. 



Dr. Duggar, who has been absent on leave in Europe for the past 

 year, now returns to us after a very profitable year's study. He has 

 had an opportunity while in Europe to make a study of several 

 obscure organisms belonging to a genus which we have found is 

 doing considerable injury in this country, especially the genus Rhiz- 

 octonia. He will bring with him material of several species of this 

 genus which he has collected on a number of different hosts in 

 Europe. This will be made use of by him in a comparative study 

 with the American species, and will assist him in clearing up much 

 of the confusion which exists regarding this organism, and others 

 which resemble it in the vegetative stage and in the mode of injury. 



Respectfully submitted, 



GEO. F. ATKINSON. 



