404 FUNGUS-FLORA. 



Tribe 16. Septonemeae. Sacc. 

 SEPTOXEMA. Corda. (fig. 18, p. 397.) 



Sterile hyphae creeping, often obsolete; fertile hyphae 

 very short or scarcely distinct from tbe conidia. Conidia 

 oblong, pluriseptate, brown, catenulate. 



Septonema, Corda, Icon. Fung., i. p. 9; Sacc., Syll., iv. 

 p. 397. 



Distinguished from Torula and Hormiscium by the septate 

 conidia. 



Septonema spilomeum. Berk. 



Tufts minute, scattered, blackish ; chains of conidia 

 branched ; conidia elliptic-oblong, 3-septate, rugulose, smoky, 

 25-28 X 8 /*. 



Septonema spilomeum, Berk., Hook. Journ. 1845, iv. p. 310, 

 t. xi., f. 5 ; Sacc., Syll., iv. n. 1895. 



On fallen wood, sawdust, &c. 



Septonema irregulare. B. & Br. (fig. 18, p. 397.) 

 Effused, thin, black, very irregular in outline; conidia 



concatenate, elliptic-oblong, 3-septate, slightly constricted at 



the septa, 17-28 x 6-8 /A. 



Septonema irregulare, B. & Br., Ann. Nat. Hist., n. 942, 



t. 15, f. 13; Sacc., Syll., iv. n. 1896. 

 On living branches of Pyrus mains. 



Subsect. 2. Macronemeae. Sacc. 



Tribe 17. Helminthosporieae. Sacc. 



HELMINTHOSPORIUM. Link. (fig. 10, p. 397.) 



Hyphae rather rigid, subsimple, often nodulose, brown, 

 usually growing on wood and forming velvety, effused 

 stains ; conidia cylindrical, fusoid, or elongato-clavate, 

 smooth, 2- many-septate, rigid. 



Helminthosporium, Link, Berlin Mag. 1809, iii. p. 10; 

 Sacc., Syll., iv. p. 402. 



