Psathyrella 



AGARICACE^E 



199 



Psathyrella agrees in structure with Mycena, Nolanea, Galera and 

 Psathyra. Species 909 920 



Pilens conical to campanulate. Stem tense, straight, fistulose. 



909914 



Pileus hemispherical to campanulate or conical. Stern flexuous, 

 pruinate at the apex, fistulose. 915 920 



Fig. 50. Psathyrella sicbatrata Gill. 

 One-half natural size. 

 Entire and in section. 



909. P. subatrata Gill, (from the blackish pileus ; ater, black) a b. 

 P. obtuse, subexpanded, umber-rufescent, pallid-rufescent when 



dry. St. smooth, whitish. G. adnexo-ascending, crowded, 

 fuliginous, blackish-umber. 

 Gregarious. Rich ground, grassy places, woods. Sept. 2^ X 5| X in. 



910. P. graeilis Quel. (gracilis, slender) a b c. 



P. obtuse, smooth, dark- or pale-fuliginous or livid with pale 

 shades of rose, tan when dry. St. smooth, whitish. G. adnate, 

 cinereous-blackish ; edge rose. 



Gregarious, waysides, hedgerows, etc. ; common. July-Oct. i X 4 X in. 



911. P. hiaseens Quel. (from the pileus opening in furrows ; Masco, 



to gape) a. 

 P. expanded, obtuse, thin, cracked-revolute, white or warm tan, 



becoming pale tan-yellow ; mid. pale sienna. St. smooth, 



whitish. G. adnate, distant, black. 

 Grassy places, hedgerows, damp woods, rubbish-heaps ; rare. Nov. 



n. 



