272 THE AGARICACEAE OF MICHIGAN 



STEM 2-4 cm. long, 2-3 mm. thick, equal, rigid-fragile, hollow, pure 

 white, apex subpruinose, subfibrillose, at first covered by minute, 

 white fibrils from the universal veil. SPORES elliptical, G-8 x 4-4.5 

 micr., smooth, purplish-brown. 



Very caespitose, on grass or about stumps in or near woods. Ann 

 Arbor. October. Rare. 



This species was described by Peck from material sent from 

 Ohio; he does not report it from New York State. The pileus is 

 provided with a slight pellicle which is scarcely gelatinous. The 

 stem separates rather easily from the pileus when the gills have 

 receded from it. Our specimens grew out of the turf with no sign 

 of nearby wood. They were sent to Peck who identified them as his 

 species. It is easily mistaken for a Psilocybe, but the margin of the 

 young cap is straight at first. 



Psilocybe Fr. 



(From the Greek, psilos, naked, and kybc, head, referring to the 

 lack of veil-remnants on the pileus.) 



Purple-brown-spored. Stem with a cartilaginous cortex, rigid- 

 fragile or toughish. Gills adnexed to adnate-subdecurrent. Veil 

 scarcely noticeable or entirely lacking, neither forming an annulus 

 nor appendiculate on the margin of the pileus. Margin of pileus at 

 first incurved. 



Putrescent, terrestrial, on very decayed wood or around stumps, 

 buried roots, sticks, etc. The genus corresponds to Collybia of the 

 white-spored group in that the stem has a cartilaginous cortex and 

 the margin of the pileus is at first incurved. The species are usually 

 rather thin and fragile and not large. They are distinguished from 

 the Hypholomas by the scanty or absent veil; those species which 

 possess a veil often show no signs of it in windy or dry weather. 



The PILEUS is convex or campanulate and expands in many 

 cases until quite plane. The color is usually dull, even in those 

 with reddish, yellow or olive hues." It is usually glabrous; a few 

 species, however, like P. canofacious, have a somewhat fibrillose sur- 

 face. The GILLS are broadly adnate and mostly slightly decurrent 

 or triangular in the first section; in the other sections they are 

 rounded behind or adnexed-emarginate. In age they are often 

 sprinkled in a variegated manner by the spores. The STEM is 

 neither stout nor truly fleshy. It is often white when young, but 

 varies to brownish, reddish or grayish. 



