PRISMABIA HELICOMYCES. 351 



Prismaria furcata. Grove, (fig. 2, p. 313.) 

 Scattered or gregarious, white ; mycelium thin, creeping ; 

 fertile hyphae short or almost absent, equal, hyaline, non-sep- 

 tate, heai ing at the tip two or rarely three radiating elongato- 

 conical conidia, rounded at the base and attenuated upwards, 

 inconspicuously multiseptate, colourless, 60-100 x 0-7 /*. 



Prismaria furcata, Grove, Journ. Bot., 1884, p. 198; Sacc., 

 Syll., iv. n. 1110. 

 On decaying wood. 



Sect. V. HELICOSPOBAE. Sacc. 

 HELICOMYCES. Link. (fig. 19, p. 27-J.) 



Hyphae veiy short, without septa. Conidia cylindrical, 

 spuriously septate, subhyaline or brightly coloured, spirally 

 coiled. 



Helicomyces, Link., Obs., i. p. 19; Sacc., Syll., iv. p. 233. 



The colourless or clear-coloured, long hypha-like spirally 

 coiled conidia mark the genus. In some species there are 

 several distinct coils in a conidium ; in others, the conidia 

 are curved to form part of a circle only. 



Helicomyces roseus. Link. 



Forming minute pale rose-coloured patches ; hyphae very 

 short, colourless, nodulose at the tip ; conidia springing 

 frcm the nodules, rose-coloured, cylindrical, becoming many- 

 septate, slightly tapering at both ends, curved in a loose 

 spiral, 150-180 x 6 /x. 



Helicomyces roseus, Link., Obs. Myc., i. p. 19, t : i. f. 35; 

 Sacc., Syl)., iv., n. 1115. 



On wood, branches, &c. 



AYheii old the tufts become whitish. 



Helicomyces tubulosus. Kiess. (fig. 19, p. 274.) 

 Forming whitish minutely powdery, minute tufts; hyphftO 

 very short ; conidia brown, many-septate, joints cuboid, 

 spirally coiled into a long tube, joints of conidia about 10 p, 

 the tube composed of 5-7 spirals. 



