Seaver: Hypocreales of North America 49 



Perithecia small, about 200 mic. in diameter, at first globose 

 finally collapsing, sulphur-yellow-pruinose, becoming green with 

 age ; asci cylindrical, 50-60 X 5-6 mic, 8-spored ; spores more 

 or less crowded in the ascus, becoming partially 2-seriate, hyaline, 

 allantoid, elongated, with ends obtuse, 7-12 X 2-2.5 mic. 



On dead wood of Populus tremuloides. 

 Type locality: Sand Coulee, Montana. 

 Distribution : Known only from type locality. 

 Specimens examined: Sand Coulee, Montana, Anderson 

 (type). 



Ellis states in the description of this species : " Perithecia . . . 

 covered with a sulphur-yellow granulose-pruinose coat which 

 .finally disappears and leaves the perithecia black." The type 

 specimens from which our description is drawn shows the peri- 

 thecia to be of a beautiful aeruginous-green color. This fact 

 not being mentioned in the original description, it is probable 

 that this change of color comes about with age. 



The specimen in the herbarium of Mr. Ellis was first referred 

 to the genus Nectriella Sacc. and afterwards described as a 

 Nectria. While in very small spores it is often difficult to deter- 

 mine the presence or absence of the septum this seems to be a 

 non-septate form and is therefore placed in the genus to which 

 it would properly belong. 



This species is entirely different from Nectria sulphured Ellis 

 & Calk., which occurs on old fungi. 



Doubtful Species 

 Nectria mycetophila Peck, Ann. Rep. N. Y. St. Mus. 26 : 

 85. 1874. Nectriella mycetophila (Peck) Sacc Syll. Fung. 2: 

 449. 1883. 



" Perithecia crowded or scattered, minute, smooth, subglobose, 

 pale yellow when young, then pinkish-ochre. Ostiola minute, 

 papillate, distinct, darker colored. Asci subclavate. Sporidia 

 oblong, simple, 12-13 X 4 mic." 



On decaying fungi. 



Type locality: New York. 



Distribution: Known only from type locality. 



The above description is quoted from Mr. Peck as no material 

 is available for examination. 



