347 



Pyr. depressa, Pk. 1. c. 



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

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

 surrounded at base by a few appi'essed, black, radiate filaments, fur- 

 nished above with a few short, erect or divergent, straight, black 

 bristles. Asci cylindrical or subclavate, 112-150 /i long. Sporidia 

 crowded or obliquely monostichous, oblong or subovate, triseptate, 

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



On dead stems of Arabis, California. 



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



Perithecia gregarious, superficial, flask-shaped, mouse-colored, 

 340-370 fi diam., clothed, except the broad, truncate ostiolum, with 

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

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

 6-7 n including the slender base, (p. sp. 50-55 [j. 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 [i). This has the 

 general appearance of a Chw.tomium. 



On exposed cotton cloth, Louisiana (Langlois). 



Pyr. phseocoraes, (Reb.) 



Sphceria phaocomes, Reb. Fl. Neom. p. 338. 

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

 Pyrenophora phceocomes, Fr. Summa Veg. Scand. p. 398. 

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



Perithecia scattered, innate, mostly prominent on both sides of 

 the leaf, globose-hemispherical, black, subastomous, with erect-diverg- 

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

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

 80 u 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, 84-90 x 21-32//, with a thin, gelatinous 



envelope. 



On {Carex)'i Carolina (Berk.), on dead grass. New York (Peck), 

 on Archangelica, officinalis, Greenland, (Rostrup). 



Pyr. paucitricha, (Fckl.) 



Pleospora paucitricha, Fckl. in the 2d Dutch North Polar Exp. 11, p. 32, tab. 1, 



fig. 3- 

 Pyrenophora paucitricha^ Sace. Syll. 7161, Cke. Syn. 5154, 



