480 ProcccdiiKjs of tJic Ohio State .Icadciiiy of Science 



KEY TO THE SPECIES. 



AMAXnW PERS. 



A.^ \'olva ])ersisteni: as a loose cup about base of stipe; pileus 

 not scaly from remnants of volva. 

 B.^ Pilens orange-red or yellow; lamellae yellow. S. 8; 

 H. 40; M. 57; Mc. 12; A. 70; P. R. 33:41. 



A. cacsarea Scop 

 P>.- I'ileus white, rarely yellow or brownish, never orange- 

 red ; lamellae white. 

 C} Stipe bulbous; margin of pileus even. 



D.^ Stipe rooting; spores elliptical. S. 14:^)4; H. 

 28; Ale. 10; P. R. 50:96. 



A. inagnivelaris Peck 

 D.- Stipe not rooting; spores globose or subglobose. 

 E.^ Pileus dr}' : lamellae adnexed ; volva circu- 

 larly split. S. 10; H. 35; ]\Ic. 10; St. 4. 



A. map pa Fr. 

 E.- Pileus viscid or slightly so when moist; lam.^l- 

 lae free ; volva bursting at top, not circu- 

 larly split. 

 F.^ Lamellae broad; stipe nearly smooth. 

 S. 9; H. 20; Mc. 7; A. 55: St. 4: 



P. R. 33 : 42 4. pJwlloides Fr. 



F.- Eamellae linear-lanceolate; surface of 

 stipe torn into scales ; pileus often 

 lobed. S. 9; H. 23; Mc. 6; A. 61; 



St. 3 A. vivos J Fr. 



Cr Stipe not bulb()u> ; margin of pileus narrowly striate. 

 S. 12 ; 14. 43 ; Mc. 11; P. R. 33 : 42 ; A. 69. 



A. sprcta Peck 

 A.- \'olva forming a closel)- fitting or adnate sheath, or concen- 

 tric rings abr)ut base of stipe, or wholly friable: pileus 

 usuallv with wart\' scales. 



