PEZIZALES 



335 



but is no longer functional or it may be absent. In Pyronema confluens 

 var. inigneum (Brown, 1915), even under the most favorable conditions, 

 fusion no longer occurs between antheridium and trichogyne, although 



f/l'r 



mm 



'M»d 



ft j* I 

 - , ft*;' 



Hu '' ' - ; 



' ¥ mm 









Fig. 222.- — Pyronema confluens. Section of an almost mature fructification. The 

 ascogonium has collapsed. At the top of the fructification, the ascogenous hyphae have 

 penetrated between the paraphyses and formed asci. Only in the apical portion of the 

 fructification may they be distinguished from the haploid hyphae. ( X 290 ; after Claussen, 

 1912.) 



the trichogyne wraps itself around the antheridium several times. In 

 both cases the female nuclei form dicaryons autogamously in the ascogo- 

 nium and migrate normally into the ascogenous hyphae. The amphi- 



