480 Proceedings- of the Ohio State .-leadeiiiy of Science 



KEY TO THE SPECIES. 



AMANITA PERS. 



A.' \olva persistent a:, a loose cup about base of stipe; pileus 

 not scaly from remnants of volva. 

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

 H. 40; AI. 57; Ale. 12; A. 70; P. R. 33:41- 



A. cacsarea Scop 

 P).- Pileus white, rarely yellow or brownish, never orange- 

 red ; lamellae white. 

 C.^ Stijjc bulbous ; margin of pileus even. 



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

 2(S; .Mc. 10; W R. 50:96. 



A. uiagnivelaris Peck 

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

 E.^ Pileus dry; lamellae adnexed ; volva circu- 

 larly split. S. 10; H. 35; Mc. 10; St. 4. 



A. iiiappa Er. 

 E.- I'ileus viscid or slightly so when m )i-t ; lani-'l- 

 lae free; volva bursting at top, not circu- 

 larly split. 



E.^ Lamellae broad; stipe nearlv smooth. 



S. 9; H. 20; Mc. 7; A. 35; St. 4; 



P. R. 33 : 42 -i. phalloides Er. 



E.- Lamellae linear-lanceolate ; surface of 



stipe torn into scales ; pileus often 



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



St. 3 i. ^'irosa Er. 



C- Stipe not bulbou> ; margin of pileus narrowly striate. 

 S. 12 ; H. 43 ; Ale. 1 1 ; P. R. 33 : 42 ; A. 69. 



A. spy eta Peck 

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

 tric rings about l)ase of stipe, or wliollv friable: pileus 

 usuallv witli wart\- scales. 



