Sporisorium destruens (Schltdl.) Vánky 1985

In Great Britain and/or Ireland:
Foodplant / pathogen
sorus of Sporisorium destruens infects and damages inflorescence of Panicum miliaceum

Sphacelotheca Panici-miliacei (Pers.) Bub&k, Mouby Ccske 2: 27 1912. Uredo (Ustilago) segetum var. Panici-miliacei Pers. Syn. Fung. 224. 1801. Uredo (Ustilago) segetum var. Panici Alb. & Schw. Consp. Fung. 130. 1805. Uredo carbo var. Panici-miliacei UC. Fl. Fr. 6: 76. 1815. Caeoma destruens Schlccht. FI. Uerol. 2: 130. 1824. Uredo destruens Duby, Bot. Gall. 901. 1830. Erysibe Panicorum var. Panici-miliacei Wallr. Fl. Crypt. Germ. 2: 216. 1833.
Ustilago Carbo var. destruens Tul. Ann. Sci. Nat. III. 7: SI. 1847.
Tilletia destruens Lev. Ann. Sci. Nat. III. 8: 372. 1847.
Ustilago destruens Schlecht.; Rab. in Klotzsch, Herb. Viv. Myc. ed. 2. 400. 1856.
Ustilago Panici-miliacei Wint. in Rab. Krypt.-Fl. 1; 89. 1884.
Sorosporium Panici-miliacei Tak. Bot. Mag. Tokyo 16: (247). 1902.
Sori in the inflorescence, completely destroying it, at first concealed by leaf-sheaths but eventually more or less exposed, about 3-6 cm. in length by 0.5-2 cm. in width, with an evident whitish false membrane that gradually flakes away revealing a dusty blackbrown spore-mass and numerous strands of plant-tissue; sterile cells of false membrane cohering rather firmly, hyaline, angular, usually mostly elongate with the shorter diameter smaller than the spores; spores light-reddish-brown, broadly ovate to chiefly subspheric or spheric, usually smooth, chiefly 7-10 /i in length, or rarely longer.
On Poacbae;
Panicum miliaceum, Colorado, North Dakota, Oregon. Washington, Wisconsin; Manitoba, Ontario, Saskatchewan, Quebec.
Type locality: Europe, on Panicum miliaceum.
Distribution: Western United States and western Canada; Ontario and Quebec; Europe, Asia, Tripoli. Australia, and Philippine Islands.