714 THE AGARICACEAE OP MICHIGAN 



hygrophanous, brown or grayish-brown (moist), whitish or whitish- 

 tan i dry), snbviscid in wet weather, even. FLESH becoming white, 

 thin. GILLS adnate to snbdeenrrent, slightly emarginate, close to 

 sub.listant, moderately broad, whitish. STEM 3-6 cm. long, 5-8 

 mm. thick, equal, curved, spongy-stuffed, apex floecose, elsewhere 

 glabrescent, whitish (dry). SPOKES minute, elliptical, smooth, 

 5-6 x 34 micr. ODOR and TASTE strongly farinaceous. 



Gregarious. On the ground, frondose woods. Ann Arbor. Octo- 

 ber. Rare. 



754. Tricholoma sordidum Fr. 



Syst. Myc, 1821. 



Illustrations: Fries, Icones, PI. 45. 

 Cooke, 111., PI. 100. 



Hard, Mushrooms, Fig. 44, p. 63, 1908. 

 Sicken, Bliitterpilze, PI. 95, Fig. 5. 



PILEUS 2-6 cm. broad, convex then expanded and depressed, 

 with or Avithout an obscure umbo, hygrophanous, flesh color to 

 avellanus (Ridg.) when young, wood-brown in age, fading, gla- 

 brous, even or substriatulate on the naked and incurved margin. 

 FLESH thin, except disk, toughish, drab color when young or moist, 

 pallid in age. GILLS adnate, at length emarginate-sinuate, vin- 

 aceous-drab to subviolaceous, close, thin, moderately broad, edge 

 entire. STEM short, 2-4 cm. long, 4-8 mm. thick, equal, solid, tough- 

 ish-fibrous, fibrillose, naked at apex, whitish or sordid, curved, base 

 mycelioid or subrooting. SPORES elliptic-oblong, 6-7.5 x 3-4 micr., 

 smooth, white. Trama of gills parallel. CYSTIDIA none. BA- 

 SIDIA clavate, 30-32 x 4-5 micr. ODOR and TASTE mild. 



Caespitosc or gregarious-subcaespitose. On decaying vegetable 

 matter, straw-heaps, etc., in fields and gardens. August-October. 

 Ann Arbor. Infrequent. 



Known by the caespitose habit, by the dingy flesh-colored or sub- 

 violaceous pileus and gills and by the place of growth. Usually 

 it appears only after abundant rains. The stem is said to be some- 

 times eccentric. It must not be confused with T. nudum. 



