733 



about ^ mm. diam., white inside, eovered by the epidermis which is 

 blackened directly over them and raised into little pustules which are 

 perforated at the apex by the papilliform ostiolum. Asci clavate. p. sp. 

 50-70x12-15 //, short-stipitate, 8-spored, with abundant paraphyses. 

 Sporidia biseriate, fusoid -oblong, ends slightly curved while lying in 

 the asci, 4-nucleate, becoming obtuse and uniseptate near the middle, 

 yellowish- brown, 16-25x5-6 ju. 



On dead canes of Arundinaria, Louisiana (L'anglois, 2338). 



Comes near Metasphceria sabalensis, (Cke.), but sporidia smaller 

 and constantly only 1 -septate. D. eumorpha, (B. & C), has the peri- 

 thecia seriate ("linear"). 



D. euryasca, Ell. & Galw. Journ. Mycol. V, p. 67. 



Perithecia scattered, suberumpent, minute (80-100 //), perforated 

 above. Asci inequilate rally ovate, sessile, 35-40x12-15 //, par- 

 aphysate? Sporidia 2-3-seriate, ovate-oblong, uniseptate, constricted 

 at the septum, rounded at the ends, brown, 12-15 x3J-5 jjl. The 

 perithecia remain partly covered by the epidermis. 



On dead leaves of Pinus Murrayana, Mt. Helena, Montana 

 (Anderson). 



Page 337. Pleospora laxa, Ell. & Galw., is on Carex straminea 

 and C. stipata, and not on grasses. 



Page 350. After Pyrenophora chrysospora, insert 



Pyr. pellita, (Fr.) 



Splicer ia pellita, Fr. S. M. p. 503. 

 Pleospora pellita, Rab. Herb. Mycol. Ed. IT, 749. 

 Pyrenophora pellita, Sacc. Syll. 3846. 

 Kxsicc. Fckl. F. Rh. 2315. Rab. F. E. 1447. 



Perithecia gregarious, rounded-conical, black, clothed with slen- 

 der, dark brown hairs, or bare above, 300 /* diam., with a fringe of 

 hyphas around the base. Asci long-clavate, gradually narrowed into 

 the stipe, 8-spored, 100-120 x 10-12 ju. Sporidia obliquely uniseriate, 

 oblong, attenuated at each end so as to become broad-fusoid, 3-septate, 

 constricted at the middle septum, 17-21 x9 /*, the two middle cells, 

 or sometimes only one of them, divided by a longitudinal septum. 

 Brachydadium penicillatum, Cda., is the conidial stage. 



On thistle stems, Bethlehem, Pa. (Schw.). 



Pyr. trichostoma, (Fr.) 



Sphceria trichostoma, Fr. S. M. II, p. 504. 

 Pyrenophora trichostoma, Fckl. Symb. p. 215. 

 Exsicc. Fckl. F. Rh. 904. Rab. Herb. Mycol. 535. Rab. F. E. 1868. Rehm Asc. 180, 592. 

 Kze. F. Sel. 268. Sydow, M.. March. 98. Plowr. Sph. Brit. 287. 



