404 FUNGTJS-FLORA. 



Trite 16. Septonemeae. Sacc. 

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



Sterile hyphae creeping, often obsolete; fertile hyphae 

 very short or scarcely distinct from tbe conidia. Conidia 

 oblong, pluriseptate, brown, catemilate. 



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

 p. 397. 



Distinguished from Torula and Sormiscium 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 /x. 



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

 t. xi., f. 6 ; 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 /x. 



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. HelmintJwsporieae, Sacc. 



HELMINTHOSPOEIUM. 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. 



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

 Sacc, Syll., iv. p. 402. 



