156 



Mycologia 



existence of the very closely related T. Thornberi. Our descrip- 

 tion is somewhat at variance with the one previously published. 

 The sori in our part of the type collection, which is fairly ample, 

 are not confined to the ovaries and the spore balls do not appear 

 to be hollow, nor do we find any evidence that the cells of the 

 spore balls adhere " by folds of their outer . . . membrane." 



Tolyposporium Junci (Schroet.) Woron. Abh. Senck. Nat. Ges. 



12: 577. 1881. 



Sorosporium Junci Schroet. Abh. Schl. Ges. Vat. Cult. 1869-1872 : 

 6. 1872. 



This species is the type of the genus and occurs rather rarely 

 in various parts of Europe, but has evidently not been reported 

 from North America. The writer has made two collections in 

 Oregon, both on Juncus bufonius L., one at Corvallis, Benton 

 Co., July, 1910, and the other at Garden City, Multnomah Co., 

 Aug., 1909, 1807. The fungus is described as attacking the 

 ovaries the stalks and also occurs at the base of the plant. In 

 our specimens the infection occurs most commonly at the nodes, 

 affecting the host somewhat similarly to Cintractia axicola on 

 Fimbristylis, though often occurring at the base of the stalks. 

 The spore mass is black, composed of spore balls of variable size 

 and shape, 10-50 /x or more and composed of few to many rather 

 small, irregular spores, 7-14 by 10-18 /x. The exposed spore wall 

 is chestnut-brown and minutely verrucose. 



Purdue University, 



Agricultural Experiment Station, 

 Lafayette, Indiana. 



