422 PROCEEDINGS OF THE ACADEMY OF [1895. 



Perithecia thickly scattered, globose, small, about 300 //. diameter, 

 covered by the epidermis which is raised into pustules pierced above 

 by the papilliform ostiolum. Asci ventricose- oblong, sessile, 55-60 

 x 18-25//, obscurely .paraphy sate, 8-spored. Sporidia crowded-biser- 

 iate, obovate, uniseptate and slightly constricted, brown, 20x10//, 

 or sometimes regularly elliptical, 20-25x10-12,//, both in the 

 same ascus. 



The asci soon disappear and then the fungus may be mistaken 

 for a Diplodia. 



Pleospora Coloradensis E. & E. 



On dead stems of Polemonium conferfvm Gray. Cameron Pass, 

 N. W. Colo., above timber, July, 1894. C. F. Baker, No. 273. 



Perithecia scattered, subcuticular, subglobose, 200-230//, diam., 

 of coarse, dark cellular structure, with a scanty mycelial fringe 

 around the base. Ostiolum papilliform, or conic- papilliform, per- 

 forating the epidermis. Asci oblong, short-stipitate, 100-130 x 25- 

 30 /'., with paraphyses more or less distinctly branched. Sporidia 

 biseriate, oblong or ovate-elliptical, scarcely or often distinctly con- 

 stricted in the middle, yellow-brown, 6-8-septate and becoming 

 clathrate-muriform, ends mostly rounded and obtuse, 27-35x12- 

 15//., slightly compressed. 



The sporidia much resemble those of P. juncicola E. & E., but are 

 not so much compressed, and the perithecia are smaller than in that 

 species, with walls of finer cellular, structure, having a reddish tinge 

 under the microscope. 



Pleospora juncicola E. & E. 



On dead culms of Juncus balticus, North Park, Colo., July, 1894, 

 alt. 9,000 ft. Prof. C. S. Crandall, No. 75. 



Perithecia scattered or gregarious, depressed-globose, 110—150//. 

 diam., covered by the cuticle, then subemergent. Ostiolum slightly 

 papilliform, soon perforated. Asci oblong, short-stipitate, broadly 

 rounded above, obscurely paraphysate, 75-110x25-30//. Sporidia 

 biseriate, elliptical, compressed, mostly not much constricted in the 

 middle, 25-35 x 15-18 //, and 10-12 // thick, golden-yellow, about 

 7-septate, and when viewed on the flattened sides, densely clathrate- 

 muriform, with about 4 rows of cells 4//. diam., but when seen edge- 

 wise, simply 5— 7-septate. 



