CERATIUM ATRACTIOI. 451 



Isaria puberula, Berk., Ann. Xat. Hist., n. 221, t. xii. f. 12 ; 

 Sacc., Syll., iv. n. 2839. 

 On dead Dahlia flowers. 



Excluded species. 

 Isaria mlcroscopica, Grev. = Stilbum tomentosum. 



CEKATIUM. Alb. & Schw. (fig. 23, p. 442.) 



Stroma club-shaped, simple or variously branched, in- 

 distinctly cellular, externally covered everywhere with, 

 conidia, borne on very short spicules that give to the stroma 

 a velvety appearance, when the conidia have fallen away ; 

 conidia large, continuous, hyaline. 



Ceratium, A. & S., Comp. Fung. Lus., p. 358 ; Sacc., Syll., 

 vol. iv. p. 596. 



The present genus is considered by some authors as 

 belonging to the Myxogastres, differing from the Hyphoniycetes 

 in the absence of true hyphae, and in the conidia giving 

 origin to active amoeboid bodies on germination. Saccardo 

 considers the genus to be allied to Isaria, but the points of 

 agreement appear to be confined to superficial resemblances. 



Ceratium hydnoides. A. & S. (fig. 23, p. 442.) 

 Forming minute, or sometimes effused, pure white tufts, 



consisting of numerous erect, simple or slightly branched 



spines that deliquesce and almost disappear when touched ; 



conidia hyaline, smooth, broadly elliptical or globose, 



10-12 x 8 or 10 /x, diameter. 



Ceratium hydnoides, A. & S., Com., p. 358, t. 11, f. 7; Sacc., 



Syll., iv. n. 2845. 

 On rotten wood. 



Sect. 2. Phragmosporeae. Sacc. 

 ATKACTIUM. Link. (fig. 33, p. 397.) 



Stroma stem-like, terete, composed of a fascicle of more or 

 less parallel hyphae, expanded to form a conidia-bearing. 



2 G 2 



