The Agaricaccac of Ohio. 473 



KEY TO THE GENERA. 



Spores white (sometimes yellow or ochraceous, lilac or pale 

 pink ; cinnabar-red in one species and green in another) 



Leucosporae (473) 

 Spores rosy, salmon-colored or rosy-rust-colored 



Rhodosporae (475) 

 Spores ochraceous, yellowish-brown or brown-rust-colored 



Ochrosporae (476) 

 Spores purple, purple-brown or black. . . Melanosporae (478) 



LEUCOSPORAE. 



A.^ Plants corky, tough, leathery or fleshy-leathery; persistent 

 or reviving when moistened. 

 \\} Plants corky; hymenium often porose at first, becoming 

 lamellate ; lamellae often branched and anastomosing. 



Lenzites (543) 

 B.- Plants not corky, lamellae never porose. 

 C.^ Edge of lamellae split into two laminae. 



Schizophyllum (543) 

 C.- Lamellae not as above. 



D.^ Pileus differing from stipe in texture, or easily 

 separable from it. 

 E.^ Pileus gelatinous-leathery. 



Heliomyces (532) 

 E.- Pileus flleshy and tough or thin and 



leathery Marasmius (533) 



D.- Slipe, if present, continuous with pileus, but 

 may L'e absent. 

 E.^ T amellae obtuse and fold-like. 



Trogia (543) 

 E.- Edge of lamellae acute. 



¥} Edge of lamellae serrate or notched. 



Lentinus (539) 

 P.- Edge normal!}' entire. . .Panus (541) 



