Ustilago residua G. P. Clinton 1902

Ustilago residua Clinton, Jour. Myc. 8 : 133. 1902
UsHlago segetum f. Danihoniae Ellis & Ev. N. Am. Fungi 1893a; hyponym. 1887.
Sori in the inflorescence, prominent, infecting the whole or sometimes confined to the individual spikelets, usually enclosed by leaf -sheaths, on exposure showing as an olive-brown dusty spore-mass ; spores rather light olive-brown, ovoid or ovate to spherical or occasionally irregular, thin-walled, wdth coarse granules giving granular-reticulate appearance under an immersion, usually 5.5-8.5//, sometimes even 11//, in length.
On Poaceae :
Danthonia californica, California.
Danthonia compressa, New York.
Danthonia intermedia, California, Wyoming.
Danthonia spicata, New Hampshire.
Danthonia unispicata, California.
Danthonia sp., Colorado. Type locality: New Hampshire, on Danthonia spicata. Distribution : New Hampshire, New York, Colorado, Wyoming, and California"; also in