198 



calities listed for the fungus are those at which the fairy rings 

 have been observed by Dr. Ramaley. 



Tricholoma praemagnum Murrill, Mycologia, 6: 269. 1914 

 Melanoleiica praemagna Murrill, North American Flora, 10: i, 



12. 1914. 



Pileus 5-20 cm. broad, hemispheric when young, then broadly 

 convex and in age fully expanded, white or gray, more or less 

 yellowish when dry, smooth at first but often much areolate and 

 sometimes with pyramidal warts in age, glabrous, dry; margin 



Fig. 4. Tricholotna praemagnum. View of upper surface of pileus showing 

 areolate and furrowed condition of old specimens. 



even, incurved, tomentose when young; flesh firm, 1-3 cm. thick 

 at the center, pure white, taste none or slightly disagreeable; 

 gills at first adnate or somewhat sinuate, becoming rounded be- 

 hind and often free with age, close or medium close, 4-7 mm. 

 broad, unequal, sometimes forking, white or whitish, tileul- 

 buff* in age or on drying; stem central, usually enlarged at the 

 base, white or gray, more or less fibrillose or fibrillose-scaly, 



