412 FUNGUS-FLORA. 



obtuse at the ends, 9-12-septate, 60 x 10-11, produced at the 

 tips of terminal branchlets, brown, terminal cell pale. 



Helminthosporium rhopaloides, Fres., Beitr. Myk., p. 50, t. 

 vi., f. 15-21 ; Sacc., Syll., iv. n. 2013. 



On rotten stems of Dianthus, Brassica, &c. 



BRACHYSPOEIUM. Sacc. (fig. 16, p. 397.) 



Hyphae rigid, subsimple, brown ; conidia ovoid or piri- 

 form, brown, 2- or few-septate, brown. Often growing on 

 wood. 



Brachysporium, Sacc., Syll., iv. p. 423. 



Helminthosporium, of authors (in part). 



Distinguished from Helminthosporium by the shortness of 

 the conidia. It is very doubtful whether relative size of 

 conidia is sufficient to constitute a valid generic character 

 when all other characters are common ; however, we have 

 accepted Saccardo's genus, as in the present group any 

 character that tends to individualise a group is of service, 

 whether of generic value or not. 



Brachysporium stemphylioides. Sacc. 



Tufts effused, black, velvety ; hyphae short, simple, pale, 

 crowded ; conidia terminal, solitary, large, obovate, 5-6-sep- 

 tate, not constricted at the septa, the two central cells dark, 

 the terminal ones colourless or yellowish, 35-37 X 16-18 /x,. 



Brachysporium stempliylioides, Sacc., Syll., iv. n. 2037. 



Helminthosporium stemphylioides, Corda, Prachtfl., p. 7, 



On dead wood. 



Brachysporium Salisburiae. Sacc. 



Hyphae torulose, 4-5 /A diam., yellow-brown, aggregated 

 into minute blackish-olive tufts ; conidia at first ovoid, hya- 

 line, 2-guttulate, afterwards larger, 2-3-septate, 14-21 x 

 6-7 p.. 



Brachysporium Salisburae, Sacc., Syll., iv. n. 2037. 



On fallen leaves of Salisburia. 



Brachysporium oosporum. Sacc. 

 Tufts small, black, hyphae scattered, simple, blackish 



