672 MINNESOTA BOTANICAL STUDIES. 



45. BOTRYOSPORIUM Corda. Sturm. Deutsch. Crypt. PL 



III, 11: 9. 1831, not Schw. 1834. 



Sporophores hyaline, simple or furcate, with alternate or 

 opposite lateral branchlets, branchlets simple, at the apex 

 bearing 3-5 spicules upon which the conidia are borne in heads; 

 ccnidia hyaline, globose or ovoid. 



2 species are reported from the United States. Botryosporium 

 prorumpens Schw. is a Speira. Saccardo gives it under Botry- 

 osporium and also as Speira erumpens (Schw.), evidently an 

 error for prorumpens. 



Tribe Cephalosporieae Sacc. Syl. Fung. 4:47. 1886. 

 Vegetative hyphae either creeping or rhizoid-like; sporo- 

 phores erect or ascending, usually simple, generally somewhat 

 inflated above, hyaline; conidia simple, single, i. e. not catenu- 

 late, capitate-clustered, typically on the apex of the sporo- 

 phore, hyaline or light-colored. 



46. HAPLOTRICHUM Lk. Sp. PL 1:52. 1824. 



Hyalopus Corda. Anleit. 58. 1842. 

 Cephalosporium Corda. Anleit. 61. 1842. 



Sporophore simple, erect, slightly or not at all inflated at the 

 apex; conidia capitate-clustered, sessile, globose to elliptical. 



The three genera, usually distinguished, do not seem suf- 

 ficiently well marked to be maintained. Haplotriclium has 6 

 species reported from the United States, including the follow- 

 ing, brought over with Cephalosporium and Hyalopus : 



HAPLOTRICHUM ACREMONIUM (CORDA). 



Cephalosporium acremonium Corda. Ic. Fung. 3:11. PI. 2. f. 29. 1839. 



HAPLOTRICHUM GR1SEUM (B. & C.) 



Hyalopus griseus B. & C. Grev. 3: 64. 1874. 



HAPLOTRICHUM MUCORINUM (B. & C) • 



Hyalopus mucorinus B. & C. Grev. 3: 64. 1874. 



HAPLOTRICHUM PARASITANS (B. & C .) 



Hyalopus parositans B. & C. Grev. 3: 64. 1874. 



47. CYLINDROCEPHALUM Bon. Handb. Alg. Myk. 103. 



1851 

 Vegetative hyphae obsolete; sporophores simple, erect, hya- 

 line; conidia capitate, sessile, cylindrical, hyaline. 

 1 species is reported from the United States. 



48. OEDOCEPHALUM Preuss. Linn. 24:31. 1851. 

 Vegetative hyphae creeping ; sporophores erect, simple, hya- 

 line, vesiculose-inflated at the apex, vesiculae scarcely areolate; 

 conidia capitate, sub-stipitate, globose to oblong, hyaline. 



4 species are reported from the United States. 



