DEVELOPMENT OF PLANTS 



249 



99. Order f. Phallales or Stink Horns. — These fungi first 

 appear as egg-like structures on rather coarse strands of the myce- 

 Hum which traverse decaying vegetation. These bodies consist 



Fig. 174. A common bird's-nest-fungus, Crucihulum: A, habit of fungus 

 on branch of hickory. B, one of the cups in section, showing the tough hyphae 

 surrounding the spore-bearing cavities. 



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Fig. 175. A common form of the Phallales, Phallus: A, the so-called egg- 

 stage which in B, sectional view, is seen to consist of an outer periderm, p, 

 and within is a central stipe, s, capped with a pileus. The spore-bearing 

 cavities of the pileus are shaded. C, stipe and pileus have emerged from the 

 periderm, which forms an irregular sac about the base of the stipe. D, later 

 stage after the spore-bearing layer has dissolved, revealing the cavities on 

 surface of pileus. 



