The Agaricaceae of Ohio. 515 



E." Lamellae rather broad; pileus at first resu- 

 pinate, becoming somewhat reniform, vis- 

 cous when moist. S. 378; St. 180; M. 80. 



P. algidus Fr. 

 D.- Pileus silky, villous or with somewhat pointed 

 scales when fresh ; not glabrous. 

 E.^ Pileus white or whitish, silky. S. 374; M. 



80 P. pinsitus Fr. 



E.^ Pileus darker in color when fresh. 



F.^ Pileus mouse-gray, usually with tufted 

 scales. S. 376; M. 80; Mc. 146; St. 



179 P. mastrucatus Fr. 



F.- Pileus blackish-blue or brownish-gray, 

 villous, not scaly. S. 377; P. R. 39: 

 65 ; St. 179 P. atrocoerulius Fr. 



Notes. 



P. nidulans Pers. is now usually placed in the genus Claud- 

 opus on account of its salmon-colored or pink spores. P. sapidus, 

 which has pale lilac spores, is usually regarded as a Pleurotus 

 because of its obvious relations with some species of that genus. 



Plants formerly referred to P. serotinoides Peck and P. 

 abscondens Peck, and so listed by Hard, are now regarded by 

 Peck as varieties of P. serotinus and P. lignatilis respectively. 



Kellerman and A\^erner (p. 305) include P. acerinus in the 

 list of Ohio plants. This seems to be the only reference to this 

 species in Ohio literature. 



Plants referred by Morgan to P. niger Schw. were probably 

 P. applicatus, which is a rather common species in southwestern 

 Ohio. 



The plants referred to P. circinatus by Hard were probably 

 P. lignatilis. He says it may be known by the white gills. The 

 lamellae of P. lignatilis are white. 



The occurrence of P. pinsitus in Ohio is rather doubtful. 



P. caespitosus B. & C. was first published as a Lentinus, 

 then as a Pleurotus. It is probably the plant now known as 

 Clitocybe monadelpha Morg. 



