Basionym Name:Helminthosporium longipilum var. effusum P. Karst., [as 'Helmisporium'] Meddn Soc. Fauna Flora fenn. 11: 146 (1884)
Homotypic synonyms:Brachysporium longipilum var. effusum (P. Karst.) Sacc., Syll. fung. (Abellini) 4: 426 (1886)