762 THE AGARICACEAE OF MICHIGAN 



cous. STEM short, 2-3 cm. long, 2-4 mm. thick, tough, equal or 

 subequaL glabrous, stuffed theu hollow, cartilaginous, fuscous with- 

 in and without." SPORES 5-6x4 micr., elliptical (Schroeter, W. 

 G. Smith). ODOR none. 



Around burned stumps or burned over soil, in exposed places. 



The above description is taken from Fries' Icones. The occur- 

 ence of the species in Michigan is somewhat uncertain, as my notes 

 are incomplete. June. Ann Arbor. Infrequent to rare. 



A Marasm'ius-like plant in appearance, but it does not revive. 

 When young and fresh, it seems to be firm, but the thin margin is 

 soon flexible. The gills are not ventricose, and a section through 

 them reveals peculiar hyphae forming the central layer, which are 

 dark colored from blackish-brown granules in their interior; they 

 are not truly ashy, but dark cinnamon-brown when fresh and 

 mature. The base of the stem is sometimes strigose-hairy with 

 fuscous-brown hairs, and under high magnification the rest of the 

 stem is seen to be covered with short, intertwined or spreading dark 

 hairs. On drying the pileus becomes rusty-reddish, or occasionally 

 appears scorched. There are some very similar species and the 

 group needs further study. It is said to occur in autumn. 



809. Collybia plexipes Fr. var. 



Syst. Myc, 1821. 



Illustration: Plate CLXV of this Report. 



PILEUS 1-2.5 cm. broad, campanulate-expanded, obtuse, gla- 

 brous, hygrophanous, blackish-chestnut (moist), rufous when dry- 

 ing, obscurely rugulose-striatulate when moist, not shining. FLESH 

 concolor, very thin on margin. GILLS slightly adnexed, narrow, 

 tapering outward, thickish, close to crowded, plane, brown, glauces- 

 cent, edge entire. STEM 3-5 cm. long, 1.5-2.5 mm. thick, subequaL 

 opaque, tubular, subterete or compressed and furrowed, flexuous, 

 cartilaginous, often curved, tough, subglabrous, black, paler at 

 apex. SPORES minute, elliptic-ovate, 5-7x2.5-3 micr., white, 

 smooth. CYSTIDIA none. ODOR and TASTE none. 



Caespitose or subeaespitose to solitary. On very rotten wood, 

 among moss, etc., about old stumps and mounds, in frondose woods. 



