802 THE AGARICACEAE OP MICHIGAN 



then tinged gray, interspaces venose, stem 3-7 cm. long, 1-2 mm. 

 thick, equal or attenuated below, toughish and firm, tlexuous, hol- 

 low, white pulverulent, brownish above, paler below, curved-root- 

 ing. SPORES spherical, covered with blunt, rod-like tubercles, 

 6-7 inicr. diam., white. CYSTIDIA moderately abundant, fusoid, 

 attenuate above, 45-60x8-12 micr. ODOR slight or none. 



On very rotten wood and debris in beech and maple forest 

 (Quirk's woods, east of Ypsilanti, Michigan). Gregarious or sub- 

 caespitose. August.. Rare. 



Au interesting tind of a remarkable plant which does not seem 

 to have been noted except by its discoverer. The structure of the 

 spores naturally leads one to suspect an Inocybe, but their color is 

 white (hyaline under the microscope), and the habit of the plants 

 is that of a Mycena. Bresadola describes it as having a strong 

 odor of rancid meal, which our plants seemed to lack. The stems 

 become firmer and tougher on drying and it is placed by Saccardo 

 under the Rigipedes next to M. raeborrhiza which is said to have 

 tuberculate spores. The latter is, however, a very different plant 

 both in color and shape, according to the figure of it by Fries. 

 (Icoiies, PL 83, Fig. 4.) Two other species of Mycena have been 

 described with tuberculate spores, M. bryophila Yogi, and M. re- 

 ceptibilis Britz. 



855. Mycena cyaneobasis Pk. 



N. Y. State Mus. Rep. 51, 1808. 

 Illustrations: Ibid, PL B, Fig. 1-7. 



PILEUS 6-15 mm. broad, tough, firm, elliptic-oval at very first, 

 then conic-campanulate, dark aeruginous-brown at first, at length 

 paler and grayish, especially toward the bluish margin, glabrous, 

 papillate or obtuse, striatulate on margin. Tram a composed of 

 a Thick amorphous to subgelatinous upper layer, elsewhere pseudo- 

 parenchymatous. GILLS narrowly udnalc, not uncinate, ascend- 

 ing, rather narrow, close, whitish or tinged grayish, edge minutely 

 fimbriate. STEM 5-8 cm. long, 1-1.5 mm. thick, equal, slender, 

 flexuoits, terete or composed, tubular, cartilaginous, elastic, floc- 

 ■cose-pruhwse at first, glabrescent, grayish-brown, hairy and rooting 

 at base. SPORES subspherical,. 7-8 micr. diam., smooth, white. 

 CYSTIDIA none. Sterile cells on edge of gills filiform, numerous, 

 40 x 2 micr., hyaline. OROR and TASTE mild or slightly of radish. 



Subcaespitose, among leaves and much decayed wood in fron- 



