MOLLISIA. 215 



Mollisia arundinacea. Phil., Brit. Disc., p. 177; 

 Kehm, Krypt.-Flora, Disc., p. 541 ; Sacc., Syll., viii. 

 n. 1425. 



Gregarious, sessile and fixed by a central point, thin, 

 circular, applanate, with a thin, dark margin, disc plane, 

 pallid or yellowish, then darker and often brownish, | 1 5 

 mm. across, glabrous; excipulum consisting of hyaline, thin, 

 densely interwoven hyphae, which pass into large, poly- 

 gonal, olive cells at the cortex, 12-18 p. diameter ; asci 

 narrowly clavate, apex narrowed, 8-spored ; spores hyaline, 

 continuous, straight or a very little bent, very narrowly 

 clavate or fusiform, 10-12 x 2-3 p. ; paraphyses slender, 

 hyaline, about 2 p. thick, tips usually not at all thickened. 



Xyloma arundinacea, D.C., Fl. Fr., vol. vi. p. 162. 



Eustegia arundinacea, Fries, Elench. Fung., ii. p. 112. 



On dead stems of Arundo phragmitesi 



Specimens examined in Moug. & Nest., n. 983, and 

 Cooke, Fung. Brit., ed. ii., n. 380. 



About \ of a lin ebroad ; usually seated on a blackish or 

 brownish space. When old the hymenium separates from 

 the excipulum in the manner of an operculum, which led 

 the illustrious Fries to place it in his genus Eustegia. 

 (Phillips.) 



Mollisia stramineum. Phil., Brit. Disc., p. 196. 



Crowded or scattered, sessile, hemispherical then ex- 

 panded, but the margin remaining slightly incurved up to 

 2 mm. across : excipulum rather fleshy ; minutely paren- 

 chymatous ; disc pale yellow with more or less of a pink 

 tinge ; externally glabrous, but densely covered with 

 minute glistening particles of oxalate of lime ; asci narrowly 

 clavate, apex narrowed, 8-spored ; spores irregularly biseriate, 

 narrowly fusiform, straight or very slightly curved, smooth, 

 hyaline, for a long time continuous, then 1-septate, 68 x 

 1*5 p. ; paraphyses slender, very slightly clavate, hyaline. 



Pcziza straminum, B. & Br., Ann. Nat. Hist., n. 571, 

 ser. ii., vol. vii. p. 15. 



Pseudolielotium stramineum, Sacc., Syll., n. 1247. 



On sheaths of wheat and other grasses. 



Type specimen examined. 



Minute, not exceeding ^ of a line in diameter ; cups 



