408 FUNGUS-FLOEA. 



HelmintJios^porium delicatulum, Berk., Ann. Xat. Hist., n. 233, 

 t. xiii. f. 20 ; Saoc, SylL, iv. n. 19G4. 

 On stems of Umbellifers. 



Helminthosporium inconspicuum. C. & E. 



Forming a very thin, cloud-like stain, hyphae elongated, 

 septate, nodulose, pale brown; conidia lanceolate, at first 

 4^6-nucleolate, then 3-5-septate, 80-120 X 20 //, epispore 

 thin. 



Hehmntlwsjjorium inconspicuum, C. & E., Grev., t. 99, f. 19; 

 Sacc, SylL, iv. n. 1969. 



On fading leaves of Indian corn (^Zea mays). 



Var. Britannicum. Grove, Sacc, SylL, iv. n. 1979. 



Effused, brownish, hyphae subflexuous, scarcely nodulose, 

 4-5-septate, pale brown, 160-180 x 10 /x ; conidia oblong, 

 diaphanous, brownish endochroma divided then 3-5-septate, 

 60-100 X 18-22 fx. 



On fading leaves of grass. 



The type has not been met with in Europe. 



Ilf Conidia 6- many-septate. 



Helminthosporium macrocarpum. Grev. 



Broadly effused, black with olive or smoke-brown tinge, 

 velvety; hyphae aggregated, subulate, simple or rarely 

 sparingly branched, septate, 350-500 X 15-20 fx; conidia 

 elongato-clavate, 6-9-septate, not constricted at the septa, 

 dingy olive, 50-90 x 15-20 fx. 



Helminthosporium macrocarpum, Grev., Scot. Or. FL, t. 148 ; 

 Sacc, SylL, iv. n. 1973. 



On branches and trunks of Carpinus, Quercus, Fraxinus, 

 Castanea, Ulmus, Corylus, Acer, Cirsium, &c. 



Helminthosporium fusiforme. Corda. (fig. 10, 

 p. 397.) 



Effused, blackish-brown, coarsely velvety ; hyphae filiform, 

 waved, 100-140 x 5-6 /x, dirty brown, paler upwards, 

 septate; conidia fusiform, 30-40 X 9-12 fx, 7-9-septate, 

 dingy olive, paler generally at both ends. 



HehnintJiosporium fusiforme, Corda, Icon. Eung., i. p. 13, 

 f. 194; Sacc, SylL, iv. n. 1974. 



On branches and wood of hazel (^Corylus), Bohinia, &c. 



