Pound and Clements: north American hyphomycetes. 657 



30. 8TEMPHLYIOI Wallr. Flor. Crypt. Germ. 2:300. 



1833. 



Vegetative hyphae intricate, creeping; sporophores ascend- 

 ing, irregularly branched, elongated, hyaline or fuscous; con- 

 idia single, acrogenous, typically smooth, fuscous, globose to 

 ovoid, muriform-septate. 



6 species are reported from North America. 



31. MACROSPORIUM Fr. Syst. Myc. 3: 373. 1832. 



Including Mystrosporium Corda. Ic. Fung. 1: 12. 1837. 



Vegetative hyphae obsolete; sporophores erector ascending, 

 simple or sub- ramose, elongate, fuscous; conidia single, acro- 

 genous, sometimes aero - pleurogenous, fuscous, oblong to 

 clavate, muriform-septate. 



Including Mystrosporium, about 80 species are reported from 

 this country. The larger part of them belongs to Pleospora her- 

 barum. 



The following changes are necessitated by our limitation of 

 the genus: 



Macrospokium atekkimum (B. & C.) 



Mystrosporium aterrimum B. & C. Cooke Black Moulds VI. 26 f. IS. 1677. 

 BlACBOSPOBiUM curtibii (Berk.) 



Mystrosporium curtisii Berk. Grev. 3:105. ls?5. 



Mystrosporium spraguei Cooke. Black Moulds. PL 28 f 17. 1877. 



MACROSPORIUM ERECTUM (E. & E.) 



Mystrosporium erection E. & E. Journ. Myc. 4:53. 1888. 

 Macrospokium mkt.anosporum (B. & C,) 



Hei/minthosporium mekmosporum B. & C Grev. 3:104. 1875. 



Mystrosporium melanosporum Sacc. Syl. Fung. 4:540. 1886. 

 Macrospokium orbiculake (C & E.) 



Mystrosporium orbiculare 0. &E. Grev. 7:40. 1878. 



MACROSPORIUM TURBINATUM (CKE. & IlARKN.'i 



Mystrosporium turbinatum Cke. & Harkn. Grev. 12:05. 1884. 



32. TRICHAEGUM Corda. Ic. Fung. 1:15. 1837. 

 Vegetative hyphae obsolescent; sporophores erect, subsim- 



ple. septate, acervulate. fuscous; conidia pleurogenous near 

 the base of the sporophore, conglobate, muriform-septate, of 

 ten asperate, globose to elliptical, fuscous. 

 4 species reported from the United States. 



33. TRIPOSPORIIM Corda. Ic. Fung. 1:16. 1837. 

 Vegetative hyphae little developed; sporophore erect, simple 



or subramose. septate, fuscous; conidia acrogenous. staurospo- 

 rous, fuscous. 



2 species reported from the United States. 



