215 



Teich. mycogena, E. & E. 1. c. 



Perithecia scattered, immersed, except the partially erumpent 

 apex, which slightly raises the surface of the Diatrype stroma, rup- 

 turing it in a subradiate manner. Perithecia of medium size with an 

 indistinct ostiolum. Asci subcylindrical about 100x12 ju, abruptly 

 contracted below into a short stipe. Sporidia biseriate, ovate-oblong, 

 with three distinct transverse septa, and a longitudinal septum across 

 one or more of the cells, yellowish, becoming dark brown, distinctly 

 constricted at the middle septum, and, when mature, 5-6-septate, 12- 

 15 x 6-8 fi. This might be mistaken for Lophiostoma Floridanum, 

 E. & E., but it has the perithecia more superficial and quite different 

 sporidia. 



Parasitic on old Diatrype stigma, Newfield, N. J. 



Teich. umbonata, E. & E. 1. c. 



Perithecia gregarious, discoid, about \ mm. diam., seated on the 

 surface of the inner bark exposed by the falling away of the epidermis. 

 Ostiolum tuberculiform. Asci cylindrical, 75-80x7-8 ju, with par- 

 aphyses. Sporidia uniseriate, ovate, 3-septate, constricted at the mid- 

 dle septum, straw-yellow, 12-15x6-8 ju. Most of the sporidia show 

 only the three transverse septa, but in some of them, one or both the 

 inner cells are divided by a longitudinal septum. It is not improbable 

 that the sporidia may finally become brown and acquire additional 

 septa. 



On dead branches of Symphoricarpus occidentalism Montana 



(Kelsey). 



Teich. megastega, E. & E. 1. c. p. 243. 



Perithecia gregarious, superficial, the base sunk in the wood or 

 bark with about two-thirds of the upper part projecting, hemispheric- 

 globose, f-1 mm. diam., rough, ostiolum inconspicuous, subpapilliform. 

 Asci cylindrical, 175-200x15 /*, with a short, stipe-like base and 

 abundant paraphyses. Sporidia uniseriate, about 7-septate and muri- 

 form, mostly constricted in the middle more or less distinctly, ends 

 rounded or obtusely pointed, 25-36x12-15 fi. Closely allied to 

 T. obducens, but perithecia less crowded, more depressed, larger and 

 rougher, and sporidia rather larger. 



On bark and wood of old weather-beaten willow and maple limbs 

 ( Acer glabrum), Montana (Kelsey). 



