EBPOKT OF THE STATE BOTANIST S28 



PLATE 6. 

 Aqaricus campksteb L. 

 Common Mushroom. 

 Fig. 1 A cluster of three young plants, in one of which the veil has just 

 separated from the margin of the cap, thereby revealing the gills. 

 2 and 3 Plants with their caps partly expanded and their gills yet 

 pink-colored . 

 ' • 4 Amature plant with its rap fully expanded and its gills blackish-brown. 

 ' ' 5 Vertical section of the cap and upper pact of the stem of an immature 



plant. 

 ' ' 6 Vertical section of the cap and upper part of the stem of a mature 



plant. 

 " 7 Four spores, X 400. 



■''ariety hortensis. 

 Fig. 8 An immature plant. 

 " 9 A mature plant. 

 ■ ' 10 Four spores, X 400. 



PLATE 7. 



AOARICCS SUBRDFESCENS Peck. 



Slightly Reddish Mushroom. 

 Fig. 1 A young plant whose veil has just separated from the margin of the 



cap, revealing the whitish color of the gills. 

 " 2 A cluster of four plants, two young, and two older ones with the caps 



partly expanded and the gills yet of a pinkish hue. 

 ' ' 3 A single plant approaching maturity. 



" 4 A mature plant whose gills have assumed the blackish-brown color. 

 ' ' 5 Vertical section of the cap and upper part of the stem of a young 



plant. 

 ' ' 6 Vertical section of the cap and upper part of the stem of a middle-aged 



plant. 

 ' ' 7 Vertical section of the cap and upper part of the stem of a mature 



plant. 

 " 8 Four spores, X 400. 

 ' ' 9 Branching strings of mycelium. 



PLATE 8. 



AOARICUS ARVENSIS Schieff. 



Meld Mushroom. Horse Mushroom. 



Fig. 1 A young plant with the veil just separated from the marg^ of the 

 cap. 

 " 2 A plant wiih the cap partly expanded, showing the dingy pinkish 

 hue of the gills. 



