347 



Pyr. depressa, Pk, 1. c* 



Perithecia 250-350 // cliam.. depressed or collapsed, at first cov- 

 ered by the epidermis, then erumpent or naked, black, sometimes 

 surrounded at base by a few appressed, black, radiate filaments, fur- 

 nished above with a few <hort. erect or divergent, straight, black 

 l>ristles. Asei cylindrical or subclavate, 112-150 // long. Sporidia 

 rowded or obliquely monostichous, oblong or subovate, triseptate, 

 with 1-2 longitudinal septa, colored, 28-35x15-20 /*. 



On dead stems of Arab-is, California. 



Pyr. hvphasmatis, E. & E. Journ. Mycol. IV, p. 77. 



Peritliecia gregarious, superficial, flask-shaped, mouse-colored. 

 340-370 fj. diani.. clothed, except the broad, truncate ostiolum. with 

 brown, sparingly branched and sparingly septate, short, soft, some- 

 \vhat crisped and matted hairs. Asci clavate-cylindrical, 65-70 x 

 6-7 // including the slender base, (p. sp. 50-55 // long), with abundant 

 paraphyses. Sporidia crowded-biseriate, brown subnavicular with the 

 ends at first subacute, 3-septate, with occasionally one of the cells 

 longitudinally divided. 12-15x5-7 (mostly 12x6 /;.). This has the 

 iri'iieral appearance of a Cho&tomium. 



On exposed cotton cloth, Louisiana (Langlois). 



Pyr. phaeocomes, (Reb.) 



Sp/uei ia phtzocomes, Reb, Fl. Neom. p. 338. 

 Ceuthospora phczocomes, Rab. Deutschl. Kr. Flora I, p. 144. 

 Pyrenophora phczocomes, Fr. Summa Veg-. Scand. p. 398. 

 Exsicc. Rab. Herb. Mycol. 747. id. F. E. 1931. Fckl. F. Rh. 798. 2362. 



Peritliecia scattered, innate, mostly prominent on both sides of 

 the leaf, globose-hemispherical, black, subastomous. with erect-di v-ig- 

 ent, black, bristle-like hairs at the apex. Asci not abundant, oblong- 

 clavate, short-stipitate, 8-spored, very large, over 300 /JL long and about 

 80 JJL broad. Sporidia cylindrical, subattenuated below, broadly 

 rounded at the ends, 6-septate and slightly constricted at the septa, 

 with one longitudinal septum running through all the cells, the second 

 somewhat broader, yellow, 84-90x21-32 a. with a thin, gelatinous 

 envelope. 



On (Ccti-exY? Carolina (Berk.), on dead grass. New York (Peck), 

 on Arcltanyeliva, officinalis, Greenland, (Rostrup). 



Pyr. paudtrieha, (Fekl.) 



Pleospora paudtrieha, Fckl. in the 2d Dutch North Polar Exp. II, p. 32, tab. i. 



fig"- 3- 



paudtrieha, Sacc. Syll. 7101, Cke. Syu. 5154 



