CLASSIFICATION OP S.GARK 



(dd) Plleue minute, 8-10 mm. broad, plane; gill 

 Bubdlstant, 711. P. aeptU u i Pi 

 (co Pileus pray to blackish, minute 

 iih Pileus glabrous, Btrlate; gills few, P, ttriatulu 



iiid) Plleua no1 glabrous. 

 (e) Spores elliptical; plleua 1 L6 mm broad; gil 



ish. 716. P. atropellitua Pk. 

 (ee) Spores globose; gills broad, t h i«k 

 Mi Plleua iiark cinereous, subprulnate, margin 



71-",. /'. applicatUS Vr. 

 iii) Plleua black, plicate on margin, pulrei ; kHI» 



close. /'. niger Schw. 

 (aa) I'ih'us never resupinate. sessile imr attached 1>> .1 ihort 

 stem, hut plleua aol marginate behind 

 (b) I'pper layer of pilous gelatinous or viscid. 

 (c) Pileus smoky yellowish green, dlmldlati thick, 



obloim, 4.5x1.6 micr. 706. P serotinu* Pr. (Syn. /' 

 tinoides Pk. I 

 (cc) Pileus whitish or tinged alutaceous core 



spathulate or fan-shaped, Bporea minute, glol tldla 



abundant (See it;. Poniw onguttotut lu-rk.) 

 (bb) Without a gelatinous surface layer. 

 (c) Pileus hygrophanouB, grayish-brown; gllla rather distant, nar- 

 row, stem lateral. 1'. tn mulus Vv. 

 (cc) Pileus not hygrophanous. 

 (d) Pileus sessile, pure white, small. Battened, radlately niRoae; 



gills Bubdlstant, broad. 709. P. candidiasim* 

 (dd) Pileus not pure white, L-2 cm. broad, cuneate, or Bpatho 

 (e) Spores elliptical. 7..". x 4-."> micr. T«»s. /• tpathulatU* Pr. 

 (ee) Spores globose, 8-4 mier. diam. 7"i7. /'. petaloidc* Pr. 



(Morgan, Cinn. Boc. Nat History, VoL 6, \>. 78) report* 



cro8pedius Pr. a rather large, brown, stipitate Bpecies, margin 



pileus crenate or Lobed, gills close, oarro* and white, spores ui" 

 huso, 5-6 micr. i 



Section I. Eccentric*. Pileus entire or al least marginate be 



hind ; Btem ccconl lie. 



*/;///•* sinuate emarginate, •»■ obtusely <ni»>it. 

 6Q6. Pleurotus ulmarius l'r. (EoiBLl 



Syst. Myc, 1821. 



Illustrations: Atkinson. Mushrooms, Fig. 102-3, p. 102, 1900 

 Hard, Mushrooms, Pig. 119, p. 156, L908. 

 Clements, Minnesota Mushrooms, Fig. 19, p. 32, 1910. 

 Chicago Nat. Hist. Burv. Hull. VII, Pari I. Plate V, I 

 N. V. State Mn-. Rep. 18, Plate 26, Fig. I i. 1906, Bo1 -1. 



Freeman, Minnesota Planl Diseases, Frontispi 191 



Plate CXL1 oi this Report. 



