TEIPOSPOEIUM — HELICOSPOEIUM. 439 



Sect. VI. HELICOSPORAE. Saoc. 



HELICOSPOEIUM:. Nees. (figs. 10, p. 397, and 29, p. 443.) 



Sterile hypliae creeping, fertile ascending, dark-coloured, 

 furnislied here and there with small spine-lilce ongrowths 

 that bear the conidia. Conidia terminal or lateral, spirally 

 coiled, hyaline or coloured, pluriguttulate or pluriseptate, 

 coloured. 



Selicosporium, Nees, Syst. der Pilze, p. 68 ; Emend., Sacc, 

 Mich., ii. p. 29 ; Sacc, Syll., iv., p. 557. 



Some pale coloured species connect the present genus with 

 Helicomyces in the Mucedineae. 



Helicosporium pulvinatum. Er. 



Tufts broadly effused, dingy yellowish-white, becoming 

 dusky ; hyphae slender, septate, branched, dingy olive, 3-4 /x. 

 diameter ; conidia in spirals with 2-3 turns, 2 /* diameter, 

 70-80 jK. long, not septate but multinucleate, hyaline. 



Helicosporium pulvinatum, Er., Syst. Myc, iii. p. 354; Sacc, 

 Syll., iv. n. 2638. 



On rotten wood, especially oak. 



Var. efFusunx, Berk. Tufts effused, exceedingly thin; 

 conidia colourless. 



Helicosporum MuUeri. Sacc. (fig 10, p. 397.) 



Tufts broadly effused, rather woolly, dark olive ; sterile 

 hyphae creeping, fertile ascending, fasciculate, 10 /«, thick, 

 not branched, septate, smoky or brownish, towards the tip 

 with minute branchlets or tooth-like projections that give 

 origin to the conidia. Conidia cylindrical, sparingly septate, 

 6-7 /A thick, colourless, spirally coiled, diameter of entire coil 

 about 25 /J,. 



Helicosporium Miilleri, Sacc. Mich., ii. p. 129 ; Sacc, Syll., 

 iv, n. 2639. 



Helicoma Miilleri, Corda. 



On rotten wood of poplar, oak, &o. 



Helicosporium viride. Sacc. 

 Tufts effused, olive-green ; mycelium olive, interwoven, 

 fertile threads erect, septate, olive, tips paler ; conidia large. 



