CLASSIFICATION OF AGARICS 271 



differs in the size of its Bpores and the characteristic spreading of 

 the margin of the pileus. 



Section II. Fibrillosae. stem and pileus when y«nm^ i1ik-cm1i>s«- 

 or fibrillose from the aniversal veil. 



261. Psathyra semivestita Berk, and Br. 

 Ann. X;ii. Mist., p. 920, L836. 



illustrations: Cooke, III.. PL 578. 



Ricken, Die Blatterpilze, PL G7, Fig. I. 



PILEUS 1-2 cm. broad, ovate-campanalate, Bubobtuse, bygro- 

 phanous, rufous-umber and pellucid-short-striate when moist, pale 

 isabelline when dry, surface sprinkled when young by superficial, 

 white fibrillose fiecks. FLESH very thin, soon ochraceous-tinged. 

 GILLS broadly adnate, narrowed in front, sometimes almost sub- 

 triangular, close, dark smoky-fuscous, edge a1 times white-fimbriate. 

 STEM i-6 cm. iong, 1.5-2 mm. thick, equal, hollow, even, rigid- 

 fragile, pale fuscous, pallescent, closely sprinkled over with white, 

 fibrillose flecks. SPOBES elliptical, 9-12x5-6 micr., variable in 

 size, smooth, dark purple-brown. CYSTIDIA few <>n Bides of u r ilN. 

 Dumerous on edge, ventricose-sublanceolate, obtuse, 50-60 x 12-15 

 micr. BASIDIA short and stout, 24x9-10 micr. ODOB Done. 



Gregarious, on horse-dung. .Ww Richmond. September. 



Known by the rufous tinge to the color of the pileus and the white 

 fibrils which at the very first cover the cap and stem. P. > • ^'itn 

 Pk. is very similar, if intt the same, bul the spore-sizes are given 

 somewhat smaller; see description in N. Y. State Mus. Bull. 105, 

 p. 28. 



262. Psathyra microsperma Pk. 

 Torr. Bot. Club, Bull. 26, 1899. 



PILEUS L-2.5 cm. broad, at first ovate or subhemispherical, then 

 convex-campanulate, often irregular, obtuse, even, bygrophanous, 

 slightly pelliculose, pale watery-brown (moist) cinereous-buff (drj 

 at tirst with scat tered flocculose white scales, glabrescent , margin 

 tirst straight. FLESB thin, concolor. GILLS adnate-seceding, 

 close, not broad, subvenl ricose, narrowed toward front, at tir- 

 whitish then grayish-brown tinged purplish, edge white-fimbri 



