HYPHOMYCETACEAE 437 



olive; conidiophores fasciculate, 100-130X12 ft, cylin- 

 drical base slightly thickened, fuliginous ; conidia acro- 

 genous, cylindrical, both ends rounded, straight, 100-115 

 X 1 8 p., 4-5-septate, not constricted, dark olive. 



Forma Avenae sativae, Briosi e Cavara, Fung. Par. 

 xs., No. 80, differs from type in the conidiophores not 

 being fasciculate but scattered, 150-200X9-12 p, and the 

 slightly smaller conidia, 8o-noX 15-16 p.. 



Helminthosporium turcicum, Pass., Boll. Comiz. Agr. 

 Farm. Ott., 1876; Helminthosporium inconspicuum, Cke. 

 and Ellis, Grev., vi. 88, pi. 99, f. 17 (1877). Conidio- 

 phores gregarious or subfasciculate on large, dry, brownish 

 spots, 150-180x6-9 p, few septate, pale olive, apex almost 

 hyaline, sometimes more or less nodulose ; conidia spindle- 

 shaped, ends acute, 5-8-septate, pale olive, 80-140x20- 

 26 //,. Examination of authentic specimens from both 

 authors enabled me to prove their identity. 



Helminthosporium gramineum, Erikss., Bot. Centralbl., 

 xxix. p. 92 (1887). Conidiophores solitary, or in clusters 

 of 2-4, yellowish, i-5-septate, often angularly bent ; conidia 

 yellowish, straight, elongato-cylindrical, i-5-septate, 50- 

 100 X 14-20 p. 



Brachysporium, Sacc. Hyphae rigid, subsimple, brown ; 

 conidia ovoid or piriform, brown, 2 or few septate, brown. 

 Often growing on wood. 



Distinguished from Helminthosporium by the shorter 

 co'nidia; doubtfully valid. 



Brachysporium pisi, Oud., Nederl. Bot. Ver., 1898, p. 

 527. Tufts effused, delicate, blackish ; conidiophores 

 fuliginous, solitary or spuriously caespitose at the base, 

 septate, smooth, or sometimes torulose near the septa, 



