35 



B. xylogeimm, E. & E. Journ. Mycol. II, p. 102. 



Pcrithecia superficial, scattered, depressed-hemispherical, rougji. 

 165-250 /JL diain., with an obscure, papilliform ostiolum. Asci obovate. 

 contracted below into a short stipe, 35-40 x 20-24 p, without par- 

 aphyses, and containing 8 oblong-elliptical, uniseptate, granular, sub- 

 hyaline, 15-16x8 p. sporidia. 



On decaying wood of Sctlix, Louisiana (Langlois). 



Differs from the usual type of Axitrhta and Dimerosporium in 

 its habitat, and the absence of anv definite mycelium. 



' * 



D. anomalum, (Cke. & Hark.) 



Asterina anomala, Cke. & Hark. Grev. IX, p. - 



" Effused, black, velvet}-. Perithecia hemispherical or globose- 

 depressed. Mycelium intricate, brown, with erect, rigid, scattered 

 setse. Asci clavate. Sporidia biseriate, lanceolate, 1-5-scptate. hya- 

 line, 20-22x4 tt. Perithecia 80 p diain.: setae about twice as long." 



On living laurel leaves, California. 



Dimerosporium Populi, E. & E., mentioned in Journ. Mycol. Y '. 

 p. 81, was not published on account of the specc. proving unsati<- 

 factory. 



ASTERINA, Lev. 



Ann. Sci. Xat. 1*45, III, p. 59. 



Perithecia globose-depressed or lenticular, membranaceous, sub- 

 astomous, seated on spots of black, radiating, subsuperficial (rarely 

 vSubinnate) mycelium. Asci typically short and thick, mostly 8-spored. 

 Sporidia two-celled, pluriseptate or continuous, hyaline or brown. 



The perithecia vary from an entire membranaceous sac to a mere 

 covering of coalesced, radiating liypha?, and the mycelium, which 

 typically forms black spots, is often light colored, scant, evanescent or 

 entirely wanting. The genus therefore contains some species nearly 

 approaching Sphc/Rrella and Microthyrium on the one hand, and 

 Ascomycetella on the other. 



A. Perithecia seated on a distinctly developed mycelium. 

 A. rubicola, E. & E. (in Herb.) 



Perithecia epiphyllous, erumj KM it-superficial, single or 2-3 to- 

 gether, conic-hemispherical, membranaceous, 75-100 p. diam.. with a 

 distinct ostiolum. Asci oblong, sessile. 35-45 x 12-1 5 //.. with obscure 

 paraphyses. Sporidia biseriate. ovate-elliptical, yellowish-brown, uni- 

 septate, constricted at the septum, rounded at the ends, 12-15x6-8 p. 



On leaves of Rubus strigoxux and R. occidentalis, Canada and 

 Wisconsin. 



