AGARICS 93 



sketch and description call to mind no existing form 

 of mushroom known to me, though from one peculi- 

 arity in particular — namely, its frequently enormous 

 size, " occasionally ten inches in diameter " — one 

 would naturally expect to find it at least notorious, 

 if not famous. 



It is plainly an Agaric related to the Campestris, 

 and from the fact of its having " pink gills darker in 

 older specimens " I suspect it to be simply another 

 local masquerade of this same Campestris, which sus- 

 picion, by the receipt of further data, I hope soon to 

 verify. 



HORSE-MUSHROOM 

 Agaricus arvensis 



This other and larger variety, so readily confound- 

 ed with the Campestris, demands further and more 

 detailed description. It may frequently be found 

 growing in company with the former, and so closely 

 do the two kinds merge in specimens of equal size 

 that it is often a puzzle to separate the species. In- 

 deed, as already mentioned by some mycologists, the 

 larger form is considered merely as a variety of the 

 Campestris. The accompanying plate (5) may well 

 serve as a portrait of this species also. It frequents 

 the same localities as the former, and is occasional- 

 ly seen crowded in clusters of crescent 

 Description shape, or in scattered rings, while its 

 of Arvensis size is generally conspicuous, the solid 

 cream -colored or white cap often ex- 

 panding to the diameter of seven inches. Its sub- 

 stance discolors to yellowish brown on being bruised. 



