Hyphomycefeae, Dematiese, Phragmosporse, Helminthoaporiiim. 615 



tenuatis, sursum abruptius contractis, apice truncato, obscuriore, 

 subinde ad unum vel noniiulla septa constrictis. 



Hab. in foliis Sabalis Palrnetto, Louisiana Ainer. bor. 

 (Langlois), 



24. Helminthosporium Palmetto Gerard Grev. XVII, p. 68. — Tenuis- 7555 

 sime in plagas orbiculares effusum, quandoque confluens; hyphis 

 erectis, crassiusculis, septatis, fuscis; conidiis fusiformibus trisepta- 



tis, aureo-succineis, 45 ::; 8. 



Hab. in foliis Palmetto, Louisiana Amer. bor. 



25. Helminthosporium avenaceum Curtis Herb., Grev. XVII, p. 67. — 7556 

 Efiusum, atrura, tenue velutinum; hyphis erectis, crassiusoulis, se- 

 ptatis, subopacis; conidiis cylindraceis v. subfusoideis, utrinque ro- 

 tundatis, 4-5-septatis, pallide melleis 75-85 s 15. 



Hab. in stramine avenaceo in Amer. bor. 



26. Helminthosporium gramineum Rabh. Herb. Myc. 332, Grev. XVII, 7557 

 p. 67. — Tenuissime efFusum; hyphis brevibus, subflexuosis, palli- 



de fuscis; conidiis solitariis, elongato-cylindraceis, 3-6-septatis. 



Hab. in foliis languidis Hordei vulgaris, Pappelsdorf Ger* 

 maniae. — H. gracili affine. 



27. Helminthosporium hadrotrichoides El!. et Ev. Journ. Myc. 1888, 755S 

 p. 44. — Maculis elongatis, albis, saepius praesentibus, plerumquQ 

 ephiphyllis; hyphis laxe csespitosis, erectis, fumoso-brunueis, con- 

 tinuis v. 1-2-septatis, 30-35 :i 6-7, apice inflatis et 8-12 ^. diara.; 

 conidiis clavato-obovatis v. clavato-cylindraceis, flavido-brunneis. 



Hab. in foliis pro parte emortuis Eragrostidis majoris, 

 Faulkland Del. Amer. bor. (A. Commons). 



28. Helminthosporium scgmoideum Cav. Mat. Lomb. p. 15, t I, f. 5 7559 



— Efi^usura, atrum; hyphis fertilibus subsparsis, erectis, rigidiu- 

 sculis, hinc inde «odulosis, 3-10-septatis, simplicibus, olivaceis , 

 100-150=; 5; conidiis raagnis falcato-sigmoideis, utrinque obtusis, 

 3-septatis, articulis mediis crassioribus, granulosis, dilute olivaceis, 

 extimi^ hyalinis, 55-65^11-14. 



Hab. in foliis, vaginis culmisque Oryzse sativae pr. Pavia 

 Ital. bor. — Subaffine H. hyalophceo. 



29. Helminthosporium Sorokinlanum Sacc. in Zeitschr. f. Pflanzenkr. 7r,6o 

 I, p. 238 (1891) et in Sorok. Ueb. einig. Krankh. etc. p. 15, f. 9. 



— CaBspitulis fulvescentibus, flocculosis; hyphis fertilibus, elongatis, 

 flexuosis septatis, brunneis ex mycelio endogeno oriundis; conidiis 

 acrogenis, ovato-fusoideis, majusculis, 80-100-30, rufo-brunneis, 

 5-10-spptatis, passim lenissime constrictis, rectis curvulisve. 



