CHAPTER XXXVI 



REVIEW OF FUNGOUS CLASSIFICATION 



In the fullness of the problems and the ontogenetic peculiarities 

 encountered in the forgoing treatment, the general aspects may have 

 been somewhat obscured. Hence in conclusion we give a brief review 

 of the important lines as they appear to the author. 



The twenty-seven orders of fungi discussed in this book are united in a 

 two-dimensional diagram into a phylogenetic scheme of their probable 

 more important morphological relationships. From the Flagellates- 

 Myxomycetes may have arisen the heterogeneous class of the Archimy- 



Agaricales Gasteromycetes 



Auriculariales 



£ 

 o 



K3 



'5 



a 

 Oi 



Tremellalcs Daeryomyoetales Cantharellalos Polyporalca 



hacidialcs 

 Pezlzales — ^Hemisphaeriales Hysteriales 



Laboulbenialcs 



Hypocreales— * . 



Dothideales 





Taphrinales 



Oonivoftos 



Perisporiales, 



Plectascales 



T 

 Endomycetalcs 



T 

 Zygomycetes 



T 

 • Chytridiales 



Chlorophyceae 

 Diagram XLIII. 



Archimycetes 



t 

 Myxoniycetcs 



Flagellatae 



cetes (p. 17) whose representatives, probably only on historical grounds 

 because of their parasitism on plants, found a refuge in the fungi to which 

 they are otherwise entirely foreign. 



All true fungi are derived from green algae in monophyletic line. They 

 first divide into two series: an oogamous, the Oomy cetes (p. 54), and a 

 zygogamous, the Chytridiales-Zygomycetes (pp. 33 and 92) which, 

 both in their imperfect forms and in the behavior of their gametangia, 

 undergo similar stages of degeneration. 



A. Imperfect Forms. — The individualization of daughter cells of 

 sporangia (the zoospores in the Oomycetes and many Chytridiales and 



618 



