TJIE PLANT (JliOri'S 99 



6. Spore formation. Select spore-forming lamellae of some 



species of Coprinus. Peel off a small portion of the 

 s] lore-bearing surface and mount in water for study. 



a. Observe with a low power the spore-bearing surface 

 of the lamella. l)o you find brown spores in groups 

 of four scattered over the surface of the lamella ? 

 Do you find basidia and paraphyses as described in 

 the text and illustrated in Fig. 148, c ? 



I. Draw a portion of your section to bring out the above 

 points. 



c. Examine the edges of your specimen for basidia bearing 

 sterigniata and spores. If not seen, tease the speci- 

 men in pieces with dissecting needles and observe 

 the edges of the pieces. Do you find basidia with 

 four sterigmata and young spores, and basidia with 

 sterigniata and brown spores ? How are these spores 

 formed at the ends of the sterigmata ? How are they 

 shed ? Draw a basidium with sterigmata and spores. 



7. Sections. If basidia and spores are not found satisfactorily 



in the above material, sections of the lamellae may 

 be used. 



PUFFBALLS 



(1KNERAL APPEARANCE, STRUCTURE, AND REPRODUCTION 



1. Examine puffballs in two or three stages of development 



(Fig. 150) to determine the character and limits of the 

 gleba and peridia. Note the changes in these two layers 

 as the puffballs mature. 



2. Examine the contents of mature puffballs. Some puffballs 



have indurated fibers, or hypha- (the capillitium), formed 

 in the gleba in connection with the spores. 



3. Construct a drawing to show the relation of gleba and 



peridia. Draw spores and capillitium. 



