Ustilago hordei (Pers.) Lagerh. 1889

Ustilago hordei (Pers.) Kellerm. & Swingle, Ann. Rep. Kan
Agr. Exp. Sta. 2 : 268. 1890.
Uredo segetum Hordei Pers. Tent. Disp. Fung. 57. 1797.
Ustilago Hordei tecta Jens. Charb. C^r^ales 4. 1889.
Ustilago J ensenii Rostr. Overs. K. Danske Vid. Selsk. Forh. 1890 : 12. 1890.
Sori in spikelets, forming an adhering purple-black spore-mass, about 6-10 mm. in length, covered rather permanently by the transparent basal parts of the glumes ; spores lightercolored on one side, usually subspherical or spherical, smooth, 5-9 fi, the most elongate rarely 9-11^, in length.
On Poaceae :
Hordeu-m spp. cult., California, Colorado, Connecticut, Illinois, Indiana, Iowa, Kansas, Maine, Massachusetts, Michigan, Mississippi, Missouri, New Hampshire, New York, North Carolina, North Dakota, Ohio, Oregon, South Dakota, Vermont, Washington, Wisconsin; Canada; Nova Scotia; Mexico. Type locality : Europe, on Hordeu-m sp. cult. Distribution : Coextensive with the cultivation of barley.