674 THE AGARICACEAE OF MICHIGAN 



(Dried: Pileus blackish, gills ochraceous-tan.) 



Caespitose, subiinbricate, ou the bark of various trees, in woods, 

 lawns, etc. On mountain ash on a lawn at Marquette. July- 

 September. Throughout the State. Infrequent. 



The plants, like the plants of the genus Marasmius, revive when 

 moistened. Mounted in water under the microscope, a section 

 through the pileus shows a gelatinous upper layer of uniform thick- 

 ness, bounded by dark kyphae on both sides of this layer, the upper 

 hyphae forming the villosity on the pileus, the lower forming an 

 opaque line next to the white flesh beneath. In front the flesh is 

 thinner than the pellicle, behind it is several times thicker. Whether 

 the variety is entirely distinct from the European species, cannot 

 be decided from data at hand. The cystidia are thick-walled, 

 slender, penetrate deep into the subhymenium, and do not project 

 far above the hymenium. 



715. Pleurotus applicatus Fr. 



Syst. Myc, 1821. 



Illustrations : Atkinson, Mushrooms, Fig. Ill, p. 109, 1900. 

 Hard, Mushrooms, Fig. 125, p. 1G2, 1908. 

 Cooke, 111., PL 244. 

 Patouillard, Tab. Analyt., Ntf. 519. 



PILEUS 3-6 mm. broad, minute, arising from an orbicular re- 

 supinate tubercle, soon horizontal but cupulate, convex, submeni- 

 branous, trama mainly gelatinous, surface p ruinate to villose be- 

 hind, obscurely striatulate, dark gray to blackish, tinged blue, ses- 

 sile or with a villose, base-like tubercle. GILLS subdistant, rela- 

 tively broad, radiating, whitish at first, soon gray or even darker 

 than the pileus. SPORES spherical, minute, 4-5 micr. diam., 

 smooth, white in mass. CYSTIDIA none. 



Gregarious, on rotten wood, often on old steins of grape vines, 

 in moist woods. Probably throughout the State; Ann Arbor, etc. 

 -I une-September. Infrequently collected. 



The dark color of this little Pleurotus causes it ordinarily to 

 -escape detection, but persistent examination of the lower side of 

 moist logs or brush-heaps is likely to disclose it. It revives on 

 moistening, and so simulates a Panus. It differs from P. atro- 

 pellitus in its globose spores and gelatinous trama. A large portion 

 of the thin pileus is composed of gelatinizing hyphae, on the top of 



