THE TREMELUNI 



481 



The hymenium is watery-gray, covered with hydnum-like teeth, stout, acute, 

 equal, one to two inches long, whitish, soft, inclined to be glaucous. The spores 

 are nearly round, 7-8/x. 



These plants are found on pine and fir trunks and on sawdust heaps. They 

 grow in groups and are very variable in form and size but easily determined, 

 being the only tremelloid fungus with true spines. The plants in Figure 405 were 

 photographed by Prof. G. D. Smith of Akron, Ohio. They are edible. Found 

 from September to cold weather. 



Figure 405. Tremellodon gelatinosum. 



Exidia. Fr. 



Gelatinous, marginal, fertile above, barren below. Exidia may be known by 

 its minute nipple-like elevations. 



Exidia grandulosa. Fr. 



This plant is called "Witches' Butter." It varies in color, from whitish to 

 brown and deep cinereous, at length blackish ; flattened, undulated, much wrinkled 

 above, slightly plicated below ; soft at first and when moist, becoming film-like 

 when dry. Found on dead branches of oak. 



