The Agaricaceae of Ohio. 661 



Pileus dry, minutely tomeiitosc ; lamellae subdistant. S. 

 1130; A. iT);; 1T. jSo; Mr. 394. 



/-". rhodoxiinthiis (Schvv.) Atk. 



Notes. 



P. porosus Berk. (S. 991 ; ^NI. 179) is usually known as Bole- 

 tinus porosus (lierk.) Peck. It is also known as Boletinellus 

 merulioides (Schw.) Murrill. N. Am. Flora 9^: 158. 



P. rhodoxanthus is ditlicult to place satisfactorily. It is 

 soniclimes known as Gomphidius rhodoxanthus, but Gomphidius 

 has a glutinous universal veil, while this species is never glutin- 

 ous. Flamniula, I'hylloporus, and Boletinus have each been pro- 

 posed as the proper genus for it. P. flavidus Berk. (S. 987; M. 

 179) is probably the same plant. 



BOLBITIUS FR. 



A.^ Pileus viscid when moist. 



B.^ Pileus striate or sulcate ; lamellae not decurrent. 



C.^ Young pileus pure white, sordid with age. Myc. 

 Notes I :t8 . .B. sordidus Lloyd 



C.^ Pileus not white. 



D.^ Pileus sulcate, brown or brownish,- 4-6 cm.;. 



lamellae free. S. 14: 156; Jour. Cin. Soc. Nat. 



Hist. 18: 36 B. radians Morg. 



D.- Pileus striate only, yellow, usually less than 4 



cm.; lamellae adnexed. S. 1074; H. 346; St. 



362 B. fragihs (L.) Fr, 



B.^ Pileus not striate or sulcate ; lamellae decurrent. S. 1077. 



B. macrorrhizus B. & Mont. 

 A.^ Pileus not viscid. 



B.' Pileus yellow, not striate: lamellae adnexed. S. 1075 J 



^r. T77: St. 3ri2 B. titubans (Bull.) Fr. 



B.^ Pileus cinereous, striate; lamellae free. S. 1113; M. 

 176; P. R. 29: 41 B. pulchrif alius ( Peck") ^Nlass. 



