HELIOTROPISM OF ASCI IN DISCOMYCETES 



309 



Otidea onotica and 0. leporina. — In Otidea onotica (Fig. 151) and 

 0. leporina (Fig. 164, p. 329), the fruit-bodies are not regularly cup- 



^ 



shaped but are relatively long and narrow and are characteristically 

 split down one side. Owing to the split, the light strikes upon the 



