PURPLE-BROWN-SPORED AGARICS. 



'21 



Agaricus (Psalliota) arvensis Schaeff. Edible. The field mushroom, 

 or horse mushroom, Agaricus arvensis, grows in fields or pastures, 

 sometimes under trees and in borders of woods. One form is often 

 white, or yellowish white, and often shows the yellow color when 

 dried. The plant sometimes occurs in the form of a fairy ring as 



FIGURE 19. Agaricus silvicola. White to cream color, or yellow stains. 



(Natural size.) Copyright. 



shown in Fig. 18. It is 5-12 cm. high, the cap from 5-15 cm. broad 

 and the stem 8-15 mm. in thickness. 



The pileus is smooth, quite thick and firm, convex to expanded. 

 The gills are first white, then tinged with pink and finally blackish 

 brown. The stem is stout, nearly cylindrical, hollow, bulbous. The 

 veil is double like that of Agaricus placomyces, the upper or inner 



