510 THE AGARICACEAE OF MICHIGAN 



(ci Stem compressed; gills yellowish at first, some spores angular. 



T>4(). X. platysperma Pk. 

 (cc) Stem terete; gills pallid at first; spores never angular. 545. 

 .v. semiorbicularis Fr. 

 (AA) Growing in the woods and thickets, on ground, mosses, decayed 

 wood, etc. 

 (a) Pileus scaly, dark reddish-brown. 549. N. siparia Fr. 

 'aa) Pileus glabrous; on wood, 

 (b) Pileus 2-4 cm. broad, dark-fuscous, with a separable pellicle. 



539. N. nimbosa Fr. var. 

 (bb) Pileus not over 2.5 cm., without a pellicle, 

 (c) Pileus with marked olivaceous tints. 540. N. centuncula Fr. 

 (cc) Pileus without olivaceous tints. 



(d) Pileus with a conical umbo, minute, 

 (e) Pileus hygrophanous, watery-cinnamon (moist) ; gills 



narrow. 543. N. lignicola Pk. 

 (ee) Pileus dark reddish-brown; gills ventricose. 542. N. 

 triscopoda Fr. 

 (dd) Pileus hemispherical or convex, 

 (e) Pileus cinnamon-brown; gills broad; stem short. 541. N. 



horizontalis Fr. 

 (ee) Pileus and stem reddish-fulvous or darker, gills yellow; 

 spores minute. 544. N. belhcla Pk. 



Section I. Gymnotae. Pileus; veil none. Spores rusty in mass. 

 (The following species grow on decayed wood.) 



*Pileus with a separable pellicle. 



539. Naucoria nimbosa Fr. var. 

 Hymen. Eiirop., 1885. 



PILEUS i'-4 cm. broad, convex, firm, obtuse or subumbonate, even r 

 dark-fuscous with a rufescent center, almost blackish-fuscous, wood- 

 brown when dry, with a sub gelatinous separable pellicle, not viscid, 

 glabrous, subpruinate when dry, veil none. FLESH concolor, 

 pallid when dry, rather thin but compact. GILLS rounded behind, 

 narrowly adnate, medium broad, crowded, thickish, fuscous-brown,. 

 edge vvhite-fimbriate. STEM 24 cm. long, 34 mm. thick, stuffed' 

 then hollow, equal, straight or curved, densely white- ftocculose 

 above, fibrillose or flbrillose scaly below, striate, pallid to fuscous- 

 brown, dark brown within, rigid-elastic, white-mycelioid at base. 

 SPOKES 6-7x3.54.5 micr., elliptical, smooth, rusty-brown. CYS- 

 TIMA scattered on sides of gills, abundant on edge, 3545x10-12 

 micr., obtuse, ventricose, stout. ODOR none. TASTE sometimes 

 unpleasant, astringent. 



On decaying logs or debris in hemlock woods; gregarious. Bay 

 View, New Richmond. September. Infrequent. 



