206 Mycologia 



Columbiani, 26, 4/0. Other specimens examined : Montana, 

 Anderson 5P<5; Iowa, Hohvay; Massachusetts, Farlow; N. 

 Dakota, Scaver (various collections). 



5. Thyronectria sphaerospora (Ellis & Everh.) 

 Nectria sphaerospora Ellis & Everh. ; Bessey & Webber, Ann. 



Rep. Neb. St. Board Agric. 1889: 193. 1890. 

 Chilonectria crinigera Ellis & Everh. Proc. Acad. Nat. Sci. Phil. 



1890: 246. 1891. 



Perithecia cespitose on a tubercular stroma in small clusters of 

 3-12 each ; individual perithecia subglobose, papillate, minutely 

 rough, at first covered with a brownish furfuraceous coat, finally 

 bare and nearly black, slightly collapsing or entire, about 300-400 

 mic. in diameter; asci clavate, about 50-70 X 12-15 mic. at first 

 filled with numerous minute spore-like bodies 2-3 X i mic, among 

 which are the true spores, 8 in each ascus ; ascospores subglobose, 

 mostly i-seriate, becoming about 3-septate and muriform, 5-8 

 mic. in diameter, surrounded by numerous spore-like bodies which 

 appear like minute appendages. 



On bark of Fraxiniis and Gleditschia. 

 Type locality: Lincoln, Nebraska. 

 Distribution : Known only from type locality. 

 Specimens examined: Nebraska, Webber (type). 



22. Thyronectroidea gen. nov. 



Perithecia cespitose in erumpcnt clusters as in Thyronectria; 

 asci clavate-cylindrical, 8-sporcd ; spores elliptical, many-septate, 

 becoming muriform, at first hyaline, becoming dark brown. 



Type species : Thyronectria chrysogramma Ellis & Everh. 

 Distinguished from Thyronectria by the colored spores. 



I. Thyronectroidea chrysogramma (Ellis & Everh.) 

 Thyronectria chrysogramma Ellis & Everh. Proc. Acad. Nat. Sci. 



Phil. 1890: 245. 1891. 

 Mattirolia chrysogramma Sacc. Syll. Fung. 9: 993. 1891. 



Perithecia springing from below the epidermis in dense cespi- 

 tose clusters of 3-6 perithecia each ; individual perithecia ovate, 

 .25-.5 mm. in diameter, clothed with a greenish-yellow coat with 

 the ostiolum bare and black; asci clavate-cylindrical, 150-175 X 

 14-18 mic, 8-spored; spores 2-seriate, elliptical, mostly a little 



