617 



long, often confluent, only slightly prominent, black and covered by 

 the blackened epidermis, appearing as black, slightly swollen blotches 

 on the leaves and culms. Ascigerous cells mostly subseriate, sunk in 

 the stroma, globose, about 100-150 t u diam. Ostiola papilliform, 

 finally umbilicate. Asci oblong-clavate, subsessile, 8-spored, 35^0 x 

 10-11 p.. Sporidia biseriate, oblong-fusoid, hyaline. 1-2-septate, not 

 constricted. 12-15 x 4-4J /JL. 



On living culms and leaves of Isolepis capillaris, South Carolina 

 (Ravenel). 



MAZZANTIA, Mont. 



Syll. p. 245. 



Stroma erumpent, oblong or suborbicular, clypeiform, convex, 

 tolerably thin, black, covered at first, then erumpent, white inside, 

 texture almost like that of a sclerotium. Ascigerous cells sunk in the 

 stroma, mostly few. Sporidia oblong or elliptical, continuous, hyaline. 



M. Galii, (Fr.) 



Sphtzria Galh\ Fr. Elench. II, p. 105. 

 Spheeria Aparines, Cast. Cat. de PI. de Mars. p. 171. 

 Mazzantia Galii, Mont. Syll. p. 246. 

 Exsicc. Fckl. F. Rh. 795. Rab. F. E. 537. Thum. M. U. 71, 1956. 



Stromata scattered, covered at first, then erumpent and very 

 prominent, elliptical or oblong, strongly arched, slightly wrinkled, 

 black, J-l mm. lon^. Ascigerous cells 1-5, narrowed above into the 

 slightly projecting ostiolum, depressed-spherical or lenticular, mem- 

 branaceous, pale. Asci cylindrical, short-stipitate, rounded above. 

 8-spored, 50-52x5-9 fjt. Sporidia biseriate, oblong-elliptical, con- 

 tinuous, with a nucleus in each end, 8-10x4-4J //. 



On dead stems of Gctlnim Aparine, California (Harkness). 



M. sepium, Sacc. & Penz. Mich. II, p. 609. 



Stromata linear-oblong, subcutaneo-erunipent, shining-black, 1|- 

 2 mm. long by scarcely J mm. wide, rather flat, obscurely punctulate 

 from the ostiola, ascigerous cells few. whitish. Asci cylindric-clavate. 

 o4-58 x 7-8 fjL, without paraphyses, 8-spored, short-stipitate. Sporidia 

 obliquely uniseriate, cylindric-fusoid. straight or curved. 2- (rarely 4-) 

 nucleate, 10-12 x 2J-3 J & hyaline. 



On dead stems of Calystegia sepium, North Greenbush, N. Y. 

 (Peck). Sporidia a little larger than in the typical form, and tri- 

 nucleate. 

 78 



