CLASSIFICATION OF AGARICS 227 



216. Psathyrella disseminata li. (Edible) 



Syst. Myc, L821. 



Illustrations: CJooke, III.. PI. li-",?. 



Gillet, Champignons de Prance, No. 586. 

 Patouillard, Tab. Analyt.. No. 351. 

 Atkinson, Mushrooms, Pig. 19, p. is, 1900. 

 Ricken, Blatterpilze, PI. 23, Pig. I. 

 Bard, Mushrooms, Pig. 280, p. ::17. L908. 



PILEUS 5-10 mm. broad, oval then campanulate, a1 ftrsi white, 

 then gray or grayish-brown, prominently sulcate-plicate to the -mall 

 hull' umbo, ai ftrsi covered by microscopic, erect, our celled hairs. 

 scurfy, glabrescent. FLESH membranous, ?erj thin. GILLS 

 adnate, ascending, rather broad, yentricose, sub-distant, at ftrsi 

 white, then ashy and finally uniformly black. STEM slender, l' :: 

 can. long, .5 to 1 nini. thick, hollow, white, at ftrsi minutely hairy 

 with spreading hairs, glabrescent. SPORES 7-10x4-5 micr., elon- 

 gate-elliptical, smooth, purple-black under microscope. I5ASIDIA 

 suhcylimlrical. 20-27x6-7 micr., t-spored, interspersed with abund- 

 ant sterile, inflated cells. CYSTIDIA none. ODOR nunc. TASTK 

 mild. 



( >n debris and on the ground in woods in extensive gregarious and 

 caespitosc (lusters of numerous individuals. 



Throughoul the Stale. Mav-October. Common. 



This species is well named: the thousands of plants which often 

 cover the ground and debris around stumps are an attractive sighl 

 when fresh. It sometimes appears in greenhouses according to 

 Atkinson. The microscopic structure of the hymenium is similar 

 to that of the Coprini, and some authors (vide Ricken) refer it to 

 that genus. 



217. Psathyrella crenata (Laseli.) IV. 



Hymen. Europ., L874. 

 [llustration : Cooke, 111.. PL 847. 



"PILEUS 2-3.5 cm. broad, hemispherical, hygrophanous, rufe 

 -rent or ochraceous, then pallid, atomate, 8ulcate-plicate, margin at 

 length crenate. PLESH membranous. GILLS adnate, subventri- 

 cose, yellowish-fuscous than Mack. STEM 6-7 cm. long, L-2 mm. 



thick', slender, glabrous, whitish, striate and mealy at apOJ 



