371 



On brush of an old broom-corn broom, Greenbush, N. Y. 

 'J'he ostioia are so obscure that they can with difficult)- be seen. 

 L. Michiittii, (West.) 



Spharia MichoUH, West. Bull. Soc. roy. bot. Belpr. II. Ser. torn. VII, No. 52, 

 Spluxrella MKhottii, Awd. Myc. JSur. p. 18, tab. VI, fig. 75. 

 LeptosphcEria irimera, Sacc. F. Ven, Ser. II, p. 319. 

 LeptospluEria Michottii, Sacc. F. Ital. tab. 279, 

 Exsicc. Plowr. Sph. Brit. 267, 268.— Rav. F. Am. 750. 



Perithecia scattered or gregarious, at first covei-ed, afterwards 

 erumpent, depressed-spherical, with a short, sliarp, conical ostiolum, 

 black, 100-120 jj. diam. Asci cjlindricclavate, lounded at the apex, 

 with a short, thick stipe, 8-spored, 50-55 x 12-15 [x, with scanty, fili- 

 form paraphyses. Sporidia biseriate, oblong-cylindrical, straight, 

 rounded at the ends, biseptate and constricted at the septa, olive- 

 brown, 16-18 X 3|-4i n, cells mostly nucleate. 



On dead stems oi Juncus, New England (Blake), on Carex, New- 

 Jersey and Georgia. 



L. arundin^cea, (Sow.) 



Sphtsrta ar-wndinacea, Sow. Eng. Fung. tab. 336. 

 Sphesria Godini, Desm. Ann. Sci. Nat. III. Ser. torn. V, p. 49. 

 Leptosph^ria Godini, Awxi. Tausch-verein, 1B66, p. 4. 

 Pleospora arundinacea, Fckl. Symb. p. 137. 

 Melogramma arundinacea, Niessl. in Rab. F. E. 1840. 

 LeptospfuEtia arundinacea, Sacc. Syll. 3081, F. Ven. Ser. II, p. 320. 

 Heptameria arundinacea, Cke. Syn. 4849. 

 Exsicc. Rab. F. E- 1840.— Rehm Asc. 193.— Thum. M. U. 1256.— M. March. 259. 



Erumpent, linear, black, with scarcely any stroma. Perithecia 

 in one or two series, connate, minutely papillate, black inside. Asci 

 elongated-clavate, with branching paraphyses, 8-spored, 80-88 x 10- 

 12 fi. Sporidia subbiseriate, fusoid, 3-septate, mostly straight, 24-30 

 X 6 //, at first hyaline, then honey-colored. Spermatia, in perithecia 

 like the ascigerous perithecia, oblong, uniseptate, hyaline. Pycnidial 

 perithecia the same, stylospores fusiform, curved, 3-5-septate, cells 

 nucleate, yellow, 26-56 x 6 /i. 



On Arundinaria, South Carolina. 



L. hysterioides, E. & E. Bull. Wash. Coll. 1884, p. 4. 



Perithecia globose, 165 // diam., covered by the blackened cuticle 

 which is pierced by the obtusely-conical ostiolum. Often several peri- 

 thecia are confluent in the dii-ection of the longer axis of the leaf so as 

 to resemble closely some minute Hysterium and this resemblance is 

 increased when, as often happens, the epidermis splits along the line of 

 the ostioia. Asci oblong or oblong-cylindrical, 85-112x12-15 fi; 



