198 



REPRODUCTION 



a tissue filling the whole interior. Each cell of this tissue that borders on 

 a cavity may bud off a spermatium either directly or from the end of a 

 short process. 



The most important contributions on the subject of spermogonia in 

 recent years are those of Gliick^ and Steiner''. GliJck, who insisted on the 



Fig. 113 A. Types of lichen " sporophores " and pycnidiospores. 1, 

 Peltigera rufescens Hoffm. x 910; 2, Lecidea (I'sora) testacea Ach. 

 xnoo; 3, C/flrfbKia ca«'oja Spreng. X 1000; 4, Pyrenula nitida 

 Ach. X 1130; 5, Parmelia iristis Nyl. X700; 6, Lobaria pulmo- 

 naria Hoffm. x ] 000 (after Gliick). 



>■ Gliick 1899. 



'■ Steiner 1901. 



