332 Bui^LETiN 73. 



afifected, and this is well shown in the same illustrations. Large 

 trees, thirty and forty feet in height, presented a very interesting 

 sight and were noticeable for a considerable distance on account 

 of the defective foliage, and especially from the brown and dead 

 colors which succeeded the dying of badly affected leaves. The 

 two forms, the one on the fruit and the one on the leaves, were 

 so common on the same trees and so closely associated that many 

 times I have been strongly inclined to consider them one and the 

 same species. This inclination has been strengthened by a study 

 of the structure of the fungus, for in many cases the asci and 

 stalk cells on the leaves are ver>^ much like those of E. farlowii 

 on the fruit, as can be seen by a reference to figures 26-31. In 

 fig. 26 the asci measure 20-27 long by 8-10 in diameter and the 

 stalk cells are 12-17 high by 8-10 in diameter. These are the 

 largest ones which I have noted and they come very near to 

 typical ones of E. farlowii on the fruit. In fig. 27 the asci and 

 stalk cells possess the same proportionate lengths, but the entire 

 fruit body is shorter, while the width is the same. Specimens 

 occur, however, in which the proportion between the length .of 

 the ascus and stalk cells is different and the stalk cell may be 

 only one-fourth as long as the entire fruit body instead of one- 

 third, and the relation of the form to that of E. deformans becomes 

 more apparent. But at the same time the stalk cell preserves 

 quite constantly the same or nearly the same diameter as the 

 ascus, and in a larger number of ca.ses it is much longer than 

 that of the latter species. Specimens on the leaves from Smyrna, 

 Del., communicated by Mr. J. B. Ellis, present much the same 

 characters, and some of the variations are illustrated in figs. 30, 

 31. Specimens on the leaves from Temple, N. H., collected by 

 Mr. A. B. Seymour, also agree in these characters, as shown by 

 some of the asci illustrated in fig. 32, The spores are rounded 

 and four to eight in an ascus. 



A form similar to this I collected at Columbia, S. C, in the 

 spring of 1889. A few leaves of a shoot which grew from the 

 base of a large tree were affected. Unfortunately these specimens 

 are now lost. On the same tree, but not near the affected leaves 

 were a few of the fruits affected by E, farlowii. I should still be 

 strongly of the opinion that the fungus on the leaves of P. serotina 



