Urocystis granulosa G. P. Clinton 1902

Urocystis granulosa Clinton, Jour. Myc. 8 : 151. 1902
Sori in the spikelets, ovoid or oblong, about 5-10 mm. in length, chiefly confined to the inner parts but showing through the more or less infected glumes, forming a granular black spore-mass ; spore-balls reddishto black-brown, ovoid to spherical, not easily ruptured, chiefly 28-50 /i in length; sterile cells reddish-yellow, ovoid to subspherical, completely covering the spores, often somewhat indefinite in appearance through the collapsing of the outer wall, about 8-13 fi in length ; spores dark reddish-brown, ovoid to spherical, or polyhedral through pressure, smooth, 1-6 or rarely more in a ball, about 13-19 fi in length.
On Poaceae :
Stipa comata, Idaho. Type locality : Idaho, on Stipa comata. Distribution : Known only from the type locality.