260 



THE ASCOMYCETES 



the fungi having pseudosclerotia and conidia of the Monilia type, 

 and in Eusclerotinia those having well-developed sclerotia and 

 conidia of the Botrytis type. Nannfeldt (1932) employed Moni- 



FiG. 105. Conidia and spermatia of Sclerotinia. A. Conidial chain from 

 conidial pustule or Monilia stage of Sclerotinia iirmila. Each conidium is 

 freed by a disjunctor mechanism. B. Germinating conidium from whose 

 hyphae spermatia are being produced. C. Spermatial formation by Sclero- 

 tinia trifolionmz. D. Conidia of Botrytis cinerea. E. Conidial head of 

 Botrytis cinerea, from diseased tobacco seedlings. {A and B, from Woro- 



nin.) 



linia, a generic name proposed by Honev, for the fungi Schroeter 

 placed in Stromatinia, and Sclerotinia for those Schroeter placed 

 in Eusclerotinia; he placed in Ciboria those species lacking co- 

 nidia. Sclerotinia {Ciboria) trifolionm?, causing stem rot of 

 clovers, and Ciboria ficariae on Rammciihis ficaria are representa- 

 tive of this group. In addition account must be taken of the fact 



