264 



Mycologia 



for treating the parasitic fungi separately from the other fungi. 

 So that we have and will have, probably, courses on parasitic 

 fungi, books on parasitic fungi and exsiccati of parasitic fungi, 

 etc. It seems to me the treatment of the lichens in books and 

 the study of them by those interested in them occupies very much 

 the same relation, as a whole, as the study and treatment of the 

 parasitic fungi. Mycologist, Morphologist, a, 2- (i a ). 



Quotation 40 



In a strictly scientific classification, the lichens must be placed 

 under the fungi ; the class lichens, as an independent group, must 

 therefore be abandoned. However, these plants may, for the sake 

 of practical combinations, be segregated as a separate group of 

 fungi, as the phytopathologists do respecting the parasitic fungi, 

 in that they consider these artificially separated from other fungi. 

 The works of Schneider, Pierce, my own researches, . . . serve 

 as the foundation for my opinion. It follows from all of these 

 works, that the lichens represent fungi which live parasitically on 

 algae. Lichcnist, a, 2- (i a )* 



Quotation 41 



It seems plain to me that the lichens must be abandoned as a 

 special systematic class. 1. Because they represent no uniform 

 organisms. 2. Because they are not a homogeneous group ; for, 

 as is well known, various classes of fungi on the one side and of 

 algae on the other side may take part in their formation. Lichens 

 are to be considered only as a biological group, somewhat as the 

 plants with mycorrhiza or the animals with Zoochlorelae and show 

 among themselves greater systematic differentiation than for in- 

 stance the insect inhabiting plants or the epiphytes. But who 



* Bei einer streng wissenschaftlichen Klassification, miissen die Flechten 

 unter den Pilzen plaziert werden ; die Klasse der Flechten, als selbstandige 

 Gruppe, muss daher kassiert werden. Jedoch konnen dieselben, wegen practi- 

 scher Kombinationen, als eine separate Gruppe von Pilzen ausgeschieden 

 werden, wie dies z. B. die Phytopathologen beziiglich der parasitischen Pilze 

 tun, indem sie dieselben kunstlich von den anderen Pilzen abgesondert betrach- 

 ten. Als Grundlage zu dieser meiner Meinung dienen die Arbeiten Schneider's, 

 Pierce's, meine eigene Untersuchungen. . . . Aus alien diesen Arbeiten folgt, 

 ■dass die Flechten Pilze darstellen, die auf Algen parasitiren. 



