H. Hypoxylon, (Pk.) 



Dothidea vorax, D. atrameniatia and D. pilulceformis, B. & C, Grev. IV, p 105, 

 Epichloe Hypoxylon, Pk. 27th Rep. X. Y. State Mus. p. 108. 

 Hypocrea atiamentosa, B. & C. Journ. Linn. Soc. X, p. 377? 

 Hypocrella Hypoxylon, Sacc. Sj'll. 5069. 

 Exsicc. EH. N. A. F. 683. 



Stroma effused, thin, grayish at first, becoming black, white in- 

 side, continuous or interrupted, extending along the upper surface of 

 the leaf or enveloping the culm lor '2 or more cm. in length. Perithecia 

 small, crowded, semiemergent, with papilliform ostiola, Asci narrow, 

 linear, 100-120x5-6 /^ Sporidia filiform, niultinucleate, hyaline, 

 nearly as long as the asci and about 1 //. thick. 



On culms and leavi.s of livino- o-rasses, from Canada to Carolina 

 and Louisiana. 



Var. pilulmformis, B. & C., has the stroma tubercular or other- 

 wise irregular. Eplidis borealis, E. A: E., Journ, Mycol. I, p. 86, i< 

 only the stylosporous stage of this specie-. 



EPICHLOE, Fr. 



Summ. Veg. Scand. p. 381. 



Stroma effused, at first pale and conidiophorous. at length lemon- 

 yellow, subcarnose, surrounding the culms like a sheath. Perithecia 

 immersed, with the ostiola scarcely prominent. Asci with 8 filiform 

 sporidia, 



E. typhiua, (Pers.) (Plate 15) 



Sphcziia typhina. Pers. Icon, et Descr. I, p. 21. 



Polystigma typhinum, De Cand. 1. c. p. 338. 



Dothidea typhina, Fr. S. M. II, p. 553. 



Epichloe typhina, Tul. in Ann. Sci. Nat. Ser. IV, t. XIII. p tS. 



Stromatospfuzria-, Grev., Typhodium, L,k. in Fr. S. M. Ill, p, 362. 



Exsicc. Kz. F. Sel. 344. Rab. Herb. Myc. 578. id, F. E. 541, 2237. Rehm. Asc. 42" 

 Thuni. F. Austr. 254. id. M. U. 1065. Schweiz. Cr. in. Sydow M. M. 65. Ell. & 

 Evrht. N. A. F. 2d Ser. 1553. 



Stroma pale, thin, surrounding the sheaths and included culms of 

 living grasses, PMevm pratense, Dactylis glomerata (and Carex, fide 

 Peck), extending longitudinally for 2-5 cm., and bearing in the early 

 stage of growth, small" (4-5 x 3 u), ovoid, hyaline conidia (Sphacelia 

 typhina, Sacc.). finally covered with a layer of semiimmersed. soft. 

 carnose-membranaceous, yellow perithecia, with somewhat prominent 

 ostiola. Asci cylindrical, 150-230 x 7-9 , slightly narrowed above, 

 with the apex truncate and capped with a subhemispherical, hyaline 

 crest. Sporidia 8 in an ascus. filiform, yellowish, multinucleate nnd 

 nearly as long as the asci. 



