PHYLOGENY OF HYMENOMYCETEAE AND GASTEROMYCETEAE 



651 



SEPTOBASIDIUM 

 \ 



AURICULARIA 



AURICULARIALES 



TREMELLALES 



\ 



TULASNELLA 



DACRYMYCETACEAE 



CERATOBASIDIUM 



CLAVARIACEAE 



HYDNACEAE c.. 



LEVEL OF BASIDIUM ORIGIN 



DISCOMYCETEAE 



FLORIDEAE 



Fig. 209. Diagram showing the author's ideas as to the possible origin of and 

 relationships between the chief families of Subclasses Teliosporeae, Heterobasidiae, 

 and Hymenomycetous Eubasidiae. 



Phylogeny of Hymenomyceteae and Gasteromyceteae 



Another very uncertain phylogenetic tree is that concerned with the 

 relationship of the Gasteromyceteae with the Hymenomyceteae. The 

 former, be it remembered, differ from the latter by the fact that the spore 

 fruits do not open and permit the escape of the spores until after the 

 basidia and basidiospores have reached maturity, while in the latter the 

 hymenium becomes exposed to the air before the basidia have produced 

 their spores. Associated with this Gasteromycetous structure of the spore 

 fruit is the fact that the basidiospores are not shot off from the sterigmata 



