BBFOBT OF THE STATE BOTANIST 9S8 



PLATE 6. 



Aqaricus campester 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. 

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



pink-colored . 

 " 4 A mature plant with its rap fully expanded and its gills blackish-brown. 

 ' ' 5 Vertical section of the cap and upper pant 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 HORTEN8I8, 

 Fig. 8 An immature plant. 

 " 9 A mature plant. 

 ■ ' 10 Four spores, X 400. 



PLATE 7. 



AOARICDS SUBRCFESCENS Peck. 



Slightly Reddish Miuhroom. 

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

 cap, revealing the whitish color of the gUls. 

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



partly expanded und 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 yoimg 



plant. 

 " 6 Verticalsectionof 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. 



Aqaricus arvensis Schaff. 



Field Mushroom. Horse Mushroom. 



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



cap. 



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



hue of the gills. 



