PRISMARIA — HELICOMYCES. 351 



Prismaria furcata. Grove. (%. 2, p. 31 o.) 

 Scattered or gregarious, white; mycelinm tliiii, (.-reeping ; 

 fertile liyphae short or almost absent, equal, h3'aline, nou-suj)- 

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

 conical conidia, rounded at the l)ase and attenuated ui:»\vardi;, 

 inconspieiiously niultiseptate, colourles--, 60-100 x 0-7 /x. 



Prismaria furcata, Grove, Journ. Bot., 1884, p. 108; Sacc., 

 SylL, iv. n. 1110. 

 On decaying wood. 



Sect. Y. HELICOSPOPiAE. Sacc. 

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



Hyphae very short, without septa. Conidia cylindrical, 

 spuriously septate, subhy aline or brightly coloured, spirally 

 coiled. 



Helicomyces, Link., Obs., i. p. 10 ; Sacc, Syll., iv. p. 233. 



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

 coiled conidia mark the genus. In some species there are 

 several distinct coils in a conirlium : in others, the conidia 

 are curved to form part of a circle only. 



Helicomyces roseus. Link. 



Eorming minute pale rose-coloured patches ; li^-phae very 

 short, colourless, nodulose at the tip ; conidia springing 

 frcm the nodules, rose-coloured, cj^lindrical, becoming many- 

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

 spiral, 150-180 x [x. 



Helicomyces roseus. Link,, Obs. jMyc, i, p. 10, t: i. f. Co; 

 Sacc, Syll., iv., n. 1115. 



On wood, branches, &c. 



W hen old the tufts become whitish. 



Helicomyces tubulosus. Eiess. (fig. 10, p. 274.) 

 Forming whitish minutely powdery, minute tufts; hyphae 

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

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

 the tube composed of 5-7 ST)irals. 



