348 



Perithecia very small, scattered, siibsuperlicial, conical, veiy 

 lilack, clothed at the apex with a few short, rigid, black hairs. Asci 

 OTate-obloug, obtuse at each end, somewhat curved, thick-walled, 

 8-spored, 112x24,u. Sporidia imbricate-subbiseriate, oblong-ovate, 

 obtuse, straight, 5-septate and muriform. constricted in the middle, 

 brown, 34x13 a. 



On leaves of SaJix Groenlandica, Franz Joseph's Fiord, Green- 

 land. 



Pyr. relicina, Fekl. Symb. p. 215. 



Pleospora polytricha, Tnl. Sel. Carp. II, p. 269. 



Perithecia innate-erumpent, sclerotoid, pale within, clothed with 

 .scattered, rigid, cuspidate, pluriseptate, black bristles 130-150x10- 

 12 ,«. Asci clavate, 150-170x35-40 [x, with a short, thick stipe. 

 .•Sporidia biseriate, rarely uniseriate, oblong-elliptical, 3-5-septate, 

 with a partial longitudinal septum, pale yellow, 35^6 x 20-30 //. 



On leaves of Triticum repens, Albany, X. Y. (Peck). 



Pyr. calvescens, (Fr.) 



SpJuEria calvescens^ Fr. Scleromyc. Suec. Exsicc. No. 401. 

 SpIuBria eriophora, Cke. Grev. V, p. 153. 

 Pleospora calvescens, Tul. Sel. Carp. II, p. 266. 

 Pyrenophora calvescens, Sacc. SyU. 3845, Cke. Syn. 5142. 

 Leptosplusria eutypoides, Pk. 38th Rep. p. 105. 

 Exsicc. Fckl. F. Rh. 2152.— Rab. F. E. 2216.— Rehm Asc. 439.— Thum. M. U. 266.— Ell. 

 N. A. F. 592. 



Perithecia gregarious, on extensive blackened areas of the stem, 

 superficial, globose or depressed, 250-300 fi diam., clothed, especially 

 below, with spreading, black, bristle-like hairs, which finally disap- 

 peai-; at length collapsing to plane or concave, with a distinct, papilli- 

 form ostiolum. Asci cylindrical, short-stipitate, 8-spored, 75-110 x 

 10-12 //, with abundant paraphyses. Sporidia uniseriate, ovate-oblong, 

 rounded at both ends, often rather narrower below, more or less con- 

 stricted in the middle, 3-septate, with an imperfect, longitudinal sep- 

 tum, 18-22x8-9 /i. 



On dead stems of Ghenopodium, Newfield, N. J., and New York 

 State. 



Pyr. eiUata, (Ell.) 



Pleospora ciliala. Ell. Bull. Torr. Bot. Club. VIII, p. 125. 

 Pyrenophora ciliala Berlese Mon. p. 237, tab. XII, fig, 6. 



Perithecia at first covered by the cuticle, but at length partially 

 erumpent, 125-175 /i diam., hemispherical. Ostiolum large, surround- 



