REPORT OF THE DIRECTOR I918 69 



PLEOSPORA SHEPHERDI^, N. sp. 



Perithecia scattered, small, .014 to .018 inch broad, covered by 

 the epidermis, erumpent, black; asci cylindrical, .006 to .008 inch 

 long, .0006 broad; spores uniseriate, oblong, generally triseptate, 

 rarely five-septate, with one or two longitudinal septa, constricted 

 in the middle, colored, .0008 to .001 inch long, .0003 to .0004 broad. 



Dead branches of Sherpherdia Canadensis. Port Henry. June. 



DOTHIDELLA ALNI, N. sp. 



Stroma orbicular, one to three lines broad, thin, convex and 

 black above, concave, brown or grayish-black and papillosely 

 rugulose below; asci cylindrical; spores ovate-elliptical, obscurely 

 uniseptate near one end, colorless, .0006 to .0008 inch long, .0003 

 to .00035 broad. 



Dead leaves of Alnus viridis. Mt. Marcy. June. 



The spores are very unequally divided, the smaller cells appearing 



like an umbo. 



LOPHIOTREMA VESTITA, N. sp. 



Perithecia closely gregarious, small, .014 to .02 inch broad, sunk 

 in the wood, enmipent, conical, clothed with a slight tawny-ferru- 

 ginous pulverulent tomentum, ostiola naked, black, subterete 

 or compressed; asci clavate, .006 to .007 inch long, .0006 to .0007 

 broad; spores crowded, subfiisiform, at first biconic and uniseptate, 

 then triseptate or quadrinucleate, constricted in the middle, colorless, 

 .0012 to .0016 inch long, .0003 to .0004 broad. 



Decorticated wood of poplar, Populus tremuloides. Gansevoort. 

 September. 



Readily distinguished by the tawny, pulverulent tomentum of the 



perithecia. 



LOPfflOTREMA PARASITICA, N. sp. 



Perithecia crowded, subsuperficial, .014 to .02 inch broad, clothed 

 with a minute subceryine pulverulent tomentum, becoming blackish- 

 brown with age, the ostiola prominent, subterete or compressed, 

 clothed like the perithecia; asci subclavate, .005 to .006 inch long, 

 .0006 to .0007 broad; spores crowded, at first biconic, then triseptate, 

 constricted in the middle, colorless, .0012 to .0016 inch long, .0003 

 broad. 



On old Hypoxylon Morsei. Elizabethtown. September. 



This and the preceding species appear to be peculiar by reason of 

 the pulverulent tomentum of the perithecia. They would seem to 

 constitute a distinct section of the genus. 



(71) 



