244 THE AGARICACEAE OF MICHIGAN 



nous stains. FLESH white or whitish, not changing color where 

 wounded. GILLS free, close, grayish at first, soon pinkish, finally 

 brown. STEM 2-5 cm. long, 6-10 mm. thick, equal or slightly taper- 

 ing upward, sometimes bulbous, stuffed or hollow, slightly fibril- 

 lose, white. ANNULUS slight, often evanescent. SPORES 

 broadly elliptic or subglobose, 5x4 micr. Edible." 



Solitary or caespitose, on grassy ground, in sandy or clay soil. 

 September-November. Detroit. 



The description is adapted from the revised one in N. Y. State 

 Bull. 116, p. 44, 1907. The original description was made largely 

 from smaller plants sent to Peck from Detroit Jby Dr. R. H. Stevens, 

 and named Agaricus pusillus; later the name was changed to that 

 given above, meaning small to large in size. I have not seen it. 



233. Psalliota comtula Fr. (Edible) 



Epicrisis, 1836. 



Illustrations: Fries, Icones, PI. 130. 

 Cooke, 111., PI. 533. 



Ricken, Blatterpilze. PL 62, Fig. 1 (as P, rusiophylla) . 

 Atkinson, Mushrooms, Fig. 24, p. 25, 1900. 



PILEUS 2-4.5 cm. broad, convex-subexpanded, subumbonate or 

 umbo obsolete, silky, creamy-white to grayish-white, tinged with 

 yellowish hues on disk, sometimes rufous-tinged. FLESH whitish, 

 becoming ochraceous under cuticle, thickish on disk. GILLS free, 

 broader in front, narrowed behind, up to 5-6 mm. broad, dingy in- 

 carnate, at length smoky-umber. STEM 3-5 cm. long, 2.5-5 mm. 

 thick, subequal, hollow, innately silky, pallid or slightly yellowish- 

 stained. ANNULTJS median, membranaceous, thin, whitish, often 

 subevanescent. SPORES 5-6x3-3.5 micr., elliptical, smooth, dark 

 purple-brown. BASIDIA 20 x 6 micr. STERILE CELLS on edge 

 of gills inflated-clavate. ODOR not marked. 



On the ground among fallen leaves in pine and beech woods. New 

 Richmond. September. Infrequent. 



The description shows a slight variation from that of other 

 authors. Atkinson gives the spore measurements 3-4x2-3 micr.. 

 Ricken considers Fries' plant as identical with P. rusiophylla 

 Lasch, and also gives small spores and basidia. Except for the 

 pale color of the cap, our plants could be referred to Ricken's P. 

 sagata Fr. The species needs further study. 



