PERIOLA VOLUTELLA. 473 



Periola tomentosa, Fries, Syst. Myc., ii. p. 267 ; Sacc., Syll., 

 iv. no. 681. 



On potatoes that have been stored. 



VOLUTELLA. Tode. (figs. 8 and 9, p. 442.) 



Sporodochium disciform, regular, margin with elongated 

 cilia, or in some species everywhere with projecting spine- 

 shaped hyphae or cilia, sessile or stipitate ; conidia elliptical, 

 oblong, or subglobose, terminal or slender, simple or branched 

 conidiophores, which constitute the sporodochium. 



Volutella, Tode, Mecklenb. Fung., i. p. 28; emended by 

 Saccardo in Mich., ii. p. 36 ; Sacc., Syll., iv. p. 682. 



Distinguished by the regular and symmetrical sporo- 

 dochium, which is either fringed or studded all over with 

 elongated projecting spine-like hyphae. Certain sessile, 

 broadly applanate, more or less irregularly shaped ' species 

 have been removed to the genus Psilonia. 



A. Sporodochium stipitate or with a narrowed base. 



Volutella ciliata. Fries, (figs. 8 and 9, p. 442.) 



Sporodochium substipitate or contracted at the base, 

 pale pink or whitish, hemispherical, 150-200 /x across, disc 

 slightly convex, furnished at the margin with a fringe of 

 scattered, hyaline, continuous or septate, elongated, pointed 

 hyphae 250-500 x 8-10 p. ; conidiophores densely crowded, 

 unbranched, colourless or with a tinge of rose-colour ; conidia 

 narrowly elliptic-oblong, ends rounded, hyaline, straight, or 

 slightly subinequilatcral, 5-7 X 2 2'5 p.. 



Volutella ciliata, Fries, Syst. Myc., iii. p. 467 ; Sacc., Syll., 

 iv. n. 3223. 



On rotten wood and branches, also on decaying fruits, 

 tubers, &c. 



Far. stipitata. Sacc., Syll., iv. n. 3223. Sporodochium 

 shortly stipitate, stem brownish, or subsessile, hemispherical, 

 rather fleshy, covered above with a rose-coloured layer of 

 conidia, marginal setae scanty, rigid, septate, subulate, 

 hyaline ; conidia elliptic-oblong, minute, hyaline, 2-guttulate, 

 5 x 2-5/i. 



