F IELD F 

 Column 26 



* Male 



# Female 



Symbol 



Ascomycetes and Fungi imperfect! 

 {Symbols J4 or Jb, respectively, in Columns 18 and 19 in Field E) 



Ascospore (a haploid, uninucleate spore, formed by a meiotic division 

 of the diploid ascus) 



Young mycelium (haploid, uninucleate) not yet producing conidia nor 

 reproducing sexually^ 



IVIycelium as in Symbol 2, but producing conidiospores and conidia 

 and /or sex organs' 



Conidium (haploid, uninucleate spore, formed from a haploid, uninucleate 

 mycelium. Will form a mycelium as in Symbol 2. )' 



"Zygote": a binucleate haploid cell resulting from the fusion of protoplasts 

 of two uninucleate sex cells, the ascogonium and the antheridium. Symbol 

 5 represents the stage prior to nuclear fusion. Included is any mycelium 

 (binucleate, haploid ascogenous hyphae) resulting from this gamete union 

 prior to ascus formation. 



Ascus-forming stage of a post- zygotic mycelium or of the "zygote". (Use 

 Symbol 7 for ascus. ) 



Ascus at the binucleate, haploid stage, prior to nuclear fusion 



Ascus after nuclear fusion (uninucleate diploid) 



Ascus after reduction division (haploid and with 2 or 4 nuclei) 



(See the footnote under the Basidiomycetes) 



91 



