(37) STUDIES AND ILLUSTRATIONS OF MUSHROOMS : II. 497 



the small one the gills are separated a short distance from the 



stems showing "gill slits." 



Here, too, the connection of the 



margin of the pileus with the stem 



is still shown. From our first 



study of mushrooms (Bulletin 



1 38) we know that this connecting 



layer between the margin of the 



pileus and stem forms the veil. 



This kind of a veil is a marginal 



veil. 



The stem is hollow even at this 

 young stage, and a slender cord 

 of mycelium extends down the 

 center of the tube thus formed as 

 is shown in the sections. From 

 the button stage the growth is 

 quite rapid, and in a short while 

 the plants are full grown. 



Now the plants are nearly all 

 white. The brown scales so close 

 together on the buttons are widely 

 separated except at the top or 

 center of the pileus, where they 

 remain close together and form a 

 broad cap resting jauntily on the 

 shaggy head. This is shown in 

 figure 85 which is from a photo- 

 graph of three plants removed 

 from the sod. 



A study of the different stages, 

 which appear from the button 

 stage to the mature plant, reveals 

 the cause of this change in color 

 and the wide separation of the 

 dark brown scales. The threads 

 of the outer layer of the pileus, 

 and especially those in the brown 

 patches seen on the buttons, soon 



86. Coprinus comatus, well mer- 

 iting the name "shaggy mane". 



(Natural size.) 



