403 



M. Ulmi, Fckl. Symb. p. 153. 



Exsicc. Fckl. F. Rh. 2008. EH. & Evrht. N. A. F. 2cl Ser. 2611. Thum. M. U. iSs2. 



Perithecia gregarious, nestling in tlie inner hark, covered by tin* 

 slightly blackened epidermis which is raised into slight pustules and 

 pierced by the papilliform ostiola, about 1 mm. diam., depressed-spher- 

 ical, coriaceous. Asci oblong. 8-spored. 250-300x30-35 //.. with abun- 

 dant paraphyses. Sporidia biseriate. broad cylindric-fusoid, 3-septate. 

 -trongly constricted in the middle, brown. 50-70 x 15-20 /JL, each cell 

 with a large nucleus. 



< )n bark of elm, London. Canada. 



Differs from M. utfjHiitmis. in its smaller sporidia. 



M. Drvadis. Rostr. Fund Gronl. p. 560. 



* 



IVrithecia scattered, sphaeroid-depressed, black. Ostiola -now 

 white. Asci thick-cylindrical, 90-115 x32-38 //..very short stipitate. 

 8-spored. Spnridia biseriate. oblong, 3-septate, constricted at the 

 -epta. especially at the middle one, hyaline, surrounded by a rather 

 broad, hyaline stratum. \o measurements of sporidia given. 



On the upper surface f dead leaves of Dry<ix odopctula. We^l 

 ern ( Jreeidand. 



M. Platani, Ces. in Rab. F. Eur. 323 (1842), and Connn. Soc. Crii. 

 I, ]. 217. 



Massaria ati innquinans, B. & C. Grev. IV, p. 156 (1876). 

 Kxsicc. Rav. F. Am. 669. EH. & Evrht. N. A. F. 2d. Ser. Cent. XXVIII. 



Perithecia gregarious, often in subcircinate groups of 4-8, lying 

 between the loosened lamina? of the bark, depressed-globose, J-J mm. 

 diam.. finally collapsing beneath, the sporidia oozing out and staining 

 the surface of the bark as in Melanconium. Asci broad clavate-cvlin- 







drical, 150-190x25-35 /j., subsessile, paraphysate. Sporidia irregu- 

 larly l)iseriate, oblong-elliptical, olive-brown, 3-6- (mostly 3-5-) septate. 

 slightly constricted at the septa, with a gelatinous envelope at first 

 finally opake so that the septa can with difficulty be seen, 35-55 x 14 

 -20 a. 



In bark of PI at anus, Carolina (Ravenel). Canada (Dearness). 



The perithecia are entirely concealed, their presence being indi- 

 cated only by slight, pustuliform elevations in the bark. The 3-sep- 

 tate sporidia are shorter and broader and scarcely constricted at the 

 septa and are not usually mixed with the longer, narrower, mostly 

 5-septate sporidia in other asci in the same perithecium. The Canada 

 specc. do not differ essentially from those in our Herb, sent from Car- 



