Tilletia muhlenbergiae G. P. Clinton 1906

Tilletia muhlenbergiae Clinton, sp. nov
Sori in ovaries, apparently 'occupying all in the inflorescence, ellipsoidal, about 3 mm. in length, somewhat hidden by the glumes, with a greenish membrane of plant tissue at apex of which are the evident remains of the styles, easily rupturing and disclosing dusty black-brown spore-mass ; sterile cells hyaline, subspherical or spherical, thinto medium thickwalled, smaller than the spores; spores reddish to dark reddish -brown, chiefly subspherical or spherical, with very prominent polygonal winged reticulations (4-8 /i wide by about 3 ," deep), 28-34 (i in diameter.
On Poaceae :
Muhlenbergia Schaffneri elongaia^ Mexico. Type collected in northeastern Durango, Mexico, October, 1905, by C. G. Pringle, and communicated by E. W. D. Holway. The winged reticulations of the spores are the most prominent of any of the species reported here.