HELMINTHOSPOEIUM. 409 



Helminthosporium apiculatum. Corda. 



Tufts black, toruentose, effused, hyphae in fascicles, flexu- 

 ous, tmbranched, 120-160 x 8 /x, tip minutely denticulate, 

 brown; conidia elliptic -fusiform, 6-8-septate, brown, 35-40 

 X 10-13 p.. 



Helminthosporium apiculatum, Corda, Ic. Fung., i. p. 13, 

 f. 191 ; Sacc., Syll., iv. n. 1975. 



On wood. 



Helminthosporium scolecoides. Corda.* 

 Tufts broadly effused, indeterminate, black; hyphae 



branched, angularly bent, rigid, brown, semipellucid ; conidia 



very long, 8-10-septate, brown, subtorulose, 50-60 /x long, 



terminal segment pale. 



Helminthosporium scolecoides, Corda, Ic. Fung., i. p. 13, f. 



180; Sacc., Syll., iv. n. 1978. 

 On wood, herbaceous stems, &c. 



Helminthosporium folliculatum. Corda. 



Tufts minute, indeterminate, tomentose; hyphae lax, 

 branched, slender, flexuous, brown, 150-200 x 8-10 /x; conidia 

 very long, pod-shaped, thickish, brown, semipellucid, 6-7 -sep- 

 tate, cells internally cuboid, 40-60 x 11-14 p, paler at the 

 ends. 



Helminthosporium folliculatum, Corda, Ic. Fung., i. p. 13, f. 

 180; Sacc., Syll., iv. n. 1979. 



On rotten wood, stems of species of Brassica, Zea, and 

 various Umbellifers. 



Helminthosporium gongrotrichum. Corda. 



Tufts minute, black, somewhat effused ; hyphae simple, 

 curved, rigid, nodulose, at first brown then quite black and 

 opaque ; conidia elliptical, 34-35 /A long, attenuated at both 

 ends, 7-8 septate, brown, pellucid. 



Helminthosporium gongrotrichum, Corda, Icon. Fung., i. p. 13, 

 t. iii. f. 192; Sacc., Syll., iv. n. 1981. 



On rotten beech wood, &c. 



Helminthosporium dendroideum. B. & Br. 



Spots indistinct, scattered, very thin, hyphae erect, attenu- 

 ated upwards, septate, with short, lateral, conidia-bearing 

 branchlets; conidia oblong-fusoid, slightly curved, 8-10-sep- 

 tate, 55-65 x 8-10 /, brown, basal cell pale. 



