448 



5. A lichen is a phylogenetically derived morphological unit. 



6. Lichens form groups of natural series phylogenetically de- 

 rived from distinct prototypes. Lichens have, therefore a poly- 

 phyletic origin. 



7. Lichens differ from the fungi morphologically as well as 

 physiologically. 



The following are the general conclusions at which Reinke 

 arrives : 



1. Although fully accepting Schwendener's theory, lichens are 

 phylogenetically, morphologically and physiologically wholly dis- 

 tinct from fungi, and it is therefore inconsistent to arrange them 

 under fungi. 



2. Lichens form a natural group coequal in systematic impor- 

 tance with fungi and algae. 



Since Reinke has written this paper Schwendener in a per- 

 sonal interview with E. L. Gregory * stated that he had no objec- 

 tion to the proposed plan of classification. Tubeuf, f as well as 

 other recent authors, expresses the opinion that the lichen is an 

 autonomous structure, a morphological unit. There are also 

 strong objections, such as those cited by Lindau. ^ 



