CLASTEROSPORIUM. 401 



"branched, septate, brown ; conidia erect, often fasciculate,, 

 cylindric-fusoid, blackish-brown, multi-septate, straight, 

 curved, or geniculate, obtuse and paler at both ends, 150— 

 200 /x long. 



Clasterosporium vermiculatum, Cke., Black Moulds, t. 11, 

 f. 10; Sacc, SylL, iv. n. 1817. 



On oak wood. 



Clasterosporium. fasciculare. Sacc. 



Tufts effused, black, opaque ; conidia crowded, erect, 

 obovate, very shortly pedicellate, usually 3-septate, scarcely 

 or not at all constricted at the septa, blackish-brown, almost 

 opaque, 30-40 x 20-25 fx. 



Clasterosporium fasciculare, Sacc, Syll., iv. n. 1834. 



On wood, especially birch. 



Clasterosporium opacum. Sacc. 



Unequally efl'used, jet black, opaque ; conidia very shortly 

 pedicellate, obloug, elliptical, obovate, or otherwise variable, 

 1-3-septate, more or less constricted at the septa, brown,, 

 then almost black and opaque, 25-35 x 13-18 fx. 



Clasterosporium opacum, Sacc, Syll., iv. n. 1836. 



On elm trunks, &c 



Clasterosporiuis. fungorum. Sacc. 



Tufts effused, plane, jet black, 2-3 mm. across, compact, 

 superficial ; conidia densely fasciculate, fusoid, apex rounded, 

 25-28 X S fx, straight or unequal sided, 3-, rarely 4-septate,. 

 slightly constricted at the septa, the two intermediate cells 

 smoky and guttulate, attenuated at the base into a short, 

 cylindrical conidiophore. 



Clasterosporium fungorum, Sacc, Miscell. Myc, i. ; Sacc, 

 SylL, iv. n. 1846. 



Sporidesmium atrum, Grev., Cr. FL, t. 194. 



On various species of Corticium, &c 



Clasterosporium abruptum. Sacc 

 Forming little, black, pulvinate tufts, and externally 

 resembling a hairy Spliaeria ; conidia oblong or slightly 

 clavate, apex rounded, base attenuated into a very short 

 conidiophore, 3-4-septate, apical and basal joints short ; the 

 second from the top very long, 50-75 X 12-18 /x. 



VOL. III. 2 D 



