166 



Hum lutens on sweet potatoes in storage parasitic or saprophytic? 

 The host plants are aHve and will grow under proper conditions. 



These and other questions on relationship of parasitism and 

 saprophytism have been brought out in our studies. Of course, 

 there is also much evidence on this subject in the writings of 

 other workers. 



It also appeared in the writings that the conception of variation 

 in size is more evident when studying a drawing than when 

 studying a written description. It is also evident that many 

 descriptions are defective in regard to size, color and number of 

 septa because of immaturity of the organisms at the time the 

 studies were made. Our studies have also brought out some 

 rather interesting points in regard to the wintering of apple scab 

 (Venturia inequalis), black rot {Sphaeropsis malorum) and many 

 other organisms. 



Mr. H. W. Thurston, Jr., of Columbia University, spoke 

 briefly on his studies on Gymnosporangium hermudianum. He 

 would emphasize the variability of this species and considered 

 several proposed allies but forms of this. Dr. W. A. Murrill 

 showed specimens of a Chinese fungus recently sent to the 

 Garden. These were purchased in a native drug store in Hong 

 Kong by the director of the Botanic Garden there. The fungus 

 is Pachyma hoelen Fries, and it is extensively cultivated on pine 

 trees in Central China. It was known long ago to Rumphius. 



Francis W. Pennell, 



Secretary pro tern. 



April io, 1917 



The meeting was held in the American Museum of Natural 

 History at 8:15 P.M. President Richards presided. There 

 were thirty persons present. 



The President called the Club's attention to an invitation from 

 the Brooklyn Botanic Garden to take part in certain ceremonies 

 in connection with the dedication of the new building. The 

 invitation was accepted. 



The scientific program consisted of an illustrated lecture on 

 "Trees in Winter" by Dr. A. F. Blakeslee, of Cold Spring 

 Harbor. The speaker described several of our common trees, 



