CRYPTOGAMS 



243 



FIG. 104. Mush- 

 room. 



(Photographed by A. 

 H. Lewis.) 



from center to circumference underneath, the 



veil or delicate membrane which stretches 



across from the rim of the cap to the annulus 



or ring which adheres to the stipe, and the 



mass of rootlike fibers at the base of the 



stipe called mycelium. 



Cut a vertical section through the center 



of the cap and down through the stipe. 



Draw the section and name all structures 



seen. 



What is the color of the under side of a 



mushroom? Are the young and the old 



ones of the same color? Do all the gills extend from center 

 to circumference ? Are they attached to 

 the stipe? 



Spore Prints. Cut off the stipe of a 

 fresh young mushroom close to the pileus. 

 Lay it down upon a piece of white paper. 

 Invert over it a tumbler to prevent the 

 wind from blowing away the spores. 



After a few hours, carefully remove 

 the tumbler and lift the pileus. What 

 do you find on the paper where the mush- 

 room lay? Beautiful spore prints may 

 be made in this way. Dark spore fungi 

 show up best on white paper, but pink 

 ' c spores or yellow or white ones are best 

 seen on black paper. 



To fix a spore print a fixative such as 



FIG. 105. Mushroom: i s used" by artists may be employed, but 



ZS3,t. the force with which an atomizer throws 



stipe ; r, ring ; g, gills, the spray will usually spoil the print. 



