91 



H. Hypoxylon, (Pk.) 



Dothidea vorax, D. atramentatia and D. pilulcEfarmis, B. & C. Grev, IV, p. 105. 

 Epickloe Hypoxylon^ Pk. 27th Rep. N. Y. State Mus. p. 108. 

 Hypocr^a cUramentosa, B. & C. Journ. I^inn. Soc. X, p. 377? 

 Hypocrella Hypoxylon^ Sacc. Syll. 5069. 

 Exsicc. BU. 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 for 2 or more em. in length. PerithBcia 

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

 linear, 100-120x5-6 /z. Sporidia filiform, multinucleate, hyaline, 

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



On culms and leaves of living grasses, from Canada to Carolina 

 and Louisiana. 



\2X. pihilmformis, B. & C, has the stroma tubercular or other- 

 wise irregular. Ephelis borealis, E. & E., Journ. Mjcol. I, p. 86, i? 

 only the stylosporous stage of this speciea 



EPICHLOE, Pr, 



Summ. Veg. Scand. p. 381, 



Stroma eifused, 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. typhina, (Pers.) (Plate 15) 



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



Polystigma iyphinum, 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. 18. 



StroniatosphiEria^ Grev., Typhodium, Lk. in Fr. S. M. Ill, p. 362. 

 Exsicc. Kz. F. Sel. 344.— Rab. Herb. Myc. 578.— id. F. E. 541, 2237.— Rehm. Asc. 428. 

 Thum. F. Austr. 254. — id, M. U. io65.~Schweiz. Cr, iii,— Sydow M- M. 65.— Ell. & 

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



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

 living grasses, Phleum pratense, Dactylis glomerata (and Garex, fide 

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

 stage of growth, small (4-5 x 3 p.), ovoid, hj'.aline conidia (Sphacelia 

 typhina, Sacc), finally covered with a layer of semiinmiersed, soft, 

 carnose-merobi^naceous, yellow perithecia, with somewhat prominent 

 ostiola. Asci cylindrical, 150-230x7-9 /^, slightly narrowed above, 

 with the apex truncate and capped with a subhemispherical, hyaline 

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

 nearly as long as the asci. 



