The Agaricaceae of Ohio. 563 



F.^ Bulb of stipe oval. S. 998; Mc, 343; 



St. 307; P. R. 36:47; H. 309; A. 22. 



A. silvicola Vitt. 



F.2 Bulb of stipe flattened. M. S. M. 163; 



H. 311 A. abruptibulbus Peck 



B.^ Pileus usually less than 4 cm. broad, very thin, pale yel- 

 low. S. 1006; Mc. 334; St. 308; H. 313; A. 24; Myc. 

 Notes 1 : 28 A. comtulus Fr. 



Notes. 



A. arvensis and A. silvicola are sometimes regarded as varie- 

 ties of A. campester. 



A brown variety of A. campester occurs but is not common. 

 This species is reported as usually occurring from August to 

 October while A. rodmani is said to occur in May and June. 



A. xylogenus Mont. (S. loio), described from Sullivant's 

 material is not an Agaricus in the present limitation of the term. 

 It is probably a yellow form of Lepiota cepaestipes. A. 

 foederatus B. & M. (S. 1003), also described from .Sullivant's 

 material, is said to have the lamellae affixed and the spores brown. 

 It is, therefore, either a Pholiota or a Stropharia. Morgan refers 

 it to the latter genus. 



A. fabaceus Berk. (S. 994; M. 11 1), described from Lea's 

 material, is reported common by Morgan, while Lloyd says it has 

 not been recognized in the last fifty years. The pileus was de- 

 scribed as being viscid. 



A. abruptibulbus is described as white, becoming yellowish in 

 drying. Plants collected at Oxford and referred by the writer 

 to this species (Ohio Nat. 10: 178) were tawny even when young 

 but had the bulbous stipe of the above species. Plants collected 

 at Columbus in September, 1910, are similar in every respect 

 except that the stipe is not distinctly bulbous. These have been 

 referred to A. silvaticus which European writers describe as 

 brown or tawny. The Oxford plants are for the present re- 

 garded as a bulbous form of A. silvaticus. 



