THE SEXUALITY OF THE FUNGI. 37 



1 I — Tremellini - i H y me]1 ° m y cetes - 

 Saccharomycetes — B F l Gasteromycetes. 



M 



•s- 



it) 



Zygomycetes — g 



o — Saprolegnise 



CJQ 



— Chytrideas — Protomycetes — Ustilaginese. 



The details may be filled in according to what has been said. 



On comparing this diagram with that offered by Brefeld, it will be 

 noticed that there is some agreement in general between them ; it is 

 chiefly in points of detail that the differences appear. Both the 

 authorities agree as to the serial arrangements (on the whole) of the 

 main groups ; but Brefeld, while also placing the Tremellini as derived 

 from Uredinea3, seeks another origin for the other Basidiowiycetes. 

 When we notice De Bary's caution in not deriving the Uredinece from 

 any particular point in the huge ascomycetous series, we may allow 

 that he and Brefeld do not differ much in opinion as to their origin 

 — the latter simply places their origin more definitely lower down in 

 the main series, a fact which would possibly be of significance if we 

 were inclined, after all, to regard the similarities between sEcidio- 

 mycetes and Cystopus. 



The chief motive in Brefeld's scheme is afforded by his peculiar 

 views on Pycinidia, and on the relationships of the Entomoplithoreoz. 

 He regards the point where the main series of higher fungi developed 

 pycinidia, as the point whence the Basidiom,ycetes (excepting Tremel- 

 lini and allies) and Ascomycetes diverge ; the former then became 

 specialised as conidiun>bearing fungi, the latter as modified sporan- 

 gium-bearing forms — i. e. as ascus-bearing fungi. 



The great motive of De Bary's views, as already shown, depends 



