Pound and Clements: north American hyphomycetes. 673 



49. RHOPALOMYCES Corda. Prachtfl. 3. 1839 

 Vegetative hyphae rhizoid-like; sporophores erect, gener- 

 ally simple, vesiculose - inflated, vesiculae areolate; conidia 

 stipitate, ellipsoid to oblong, hyaline. 



2 species are reported from the United States. 



50. SIG3I0IDE0MYCES Thaxt. Bot. Gaz. 16: 22. 1891. 

 Sporophores erect, much-branched, bearing sub-dichotom- 



ous sigmoid vesiculae on short lateral branches; conidia stipi- 

 tate, hyaline. 



1 species described. 



[To be Continued.] 



