STIGMINA FUSAEIELLA. 403 



p^Stigmina Visianica. Sacc. 



Patches minnte, scattered or gregarious, erumpent, be- 

 coming superficial, flattened, blackish-olive, slightly velvety, 

 hypophyllous ; conidia densely packed, but individually 

 distinct at the base, springing from a dark, cellular basal 

 stratum, elliptic-oblong, rather obtuse at both ends, 18-35 

 X 7-10 p, 2-4 usually 3-septate, rarely with 1 or more 

 vertical septa, greenish-olive; conidiophores very short, 

 hyaline. 



Stigmina Visianica, Sacc., Fung. Ital., t. 930 ; Sacc., Syll., 

 iv. n. 1871. 



On fallen leaves of Platanus orientalis. 



Resembles Cladosporium epiphyllum in habit. 



FUSARIELLA. Sacc. (fig. 4, p. 397.) 



Fertile hyphae simple or variously branched, short or 

 very short, somewhat hyaline, springing from a creeping 

 mycelium ; conidia acrogenous, fusiform, more or less 

 curved, 2- many-septate, olive or fuscous. 



Fusariella, Sacc., Misc. Myc., i. p. 29; Sacc., Syll., iv. 

 p. 395. 



Analogous with Fusarium. in the structure of the conidia, 

 but resembling a Torula in habit. 



Fusariella atrovirens. Sacc. (fig. 4, p. 397.) 



Forming minute patches at first whitish, then black with 

 a tinge of olive, hyphae whitish and radiating ; conidia 

 forming a pulverulent central mass, fusiform, olive, 3-septate, 

 24-32 x 5-7 /A, straight, or usually more or less angularly 

 bent or curved, the bending often due to the larger size of 

 the second joint of the conidium. 



Fusariella atrovirens, Sacc., Syll., iv. n. 1876. 



Fusarium atrovirens, Berk., Engl. Flor., v. p. 351. 



On stem and leaves of onion (Allium). 



2 D 2 



