Ustilago tritici (Pers.) Rostr. 1890

Ustilago tritici (Pers.) Rostr. Overs. K. Danske Vid. Selsk
Forh. 1890 : 15. Mr 1890.
Uredo segetum Tritici Pers. Tent. Disp. Fung. 57. 1797.
Ustilago segetum Tritici Jens. Om Korns. Brand 61. 1888.
Ustilago Tritici Jens.; Kellerm. & Swingle, Ann. Rep. Kan. Agr. Exp. Sta. 2 : 262. Je 1890.
Ustilago Tritici i. folicola P. Henn. Zeits. Pflanzenk. 4: 139. 1894.
Ustilagidium. Tritici Herzb. in Zopf, Beitr. Phys. Morph. Org. 5 : 7. 1895.
Sori in spikelets, forming a dusty olive-brown spore-mass, about 8-12 mm. long by half as wide, usually entirely destroying floral parts and eventually becoming dissipated and leaving behind only the naked rachis ; spores lighter-colored on one side, usually subspherical to spherical, occasionally more elongate, minutely echinulate especially on the lighter side, 5-9/^ in length.
On Poaceae :
Triticum. vulgare, Alabama, Idaho, Illinois, Indiana, Iowa, Kansas, Massachusetts, Michigan, Minnesota, Missouri, Nebraska, New Jersey, New York, North Carolina, North -Dakota, Ohio, South Dakota, Tennessee, Texas, Vermont, Washington, West Virginia, Wisconsin, Wyoming ; Mexico. Type locality : Europe, on Triticum. vulgare'. Distribution : Coextensive with the cultivation of wheat.