Tilletia guyotiana Har. 1900

Tilletia Guyotiana Hariot, Jour, de Bot. 14: 117. 1900 Thecaphora Guyotiana Hariot, Mem. Soc. Acad. Aube 61: 195; hyponym. 1898. Tilletia Velenmskyi Bubak, Oesterr. Bol. Zeils. 53: 51. 190.^. Tilletia belgradensis Magnus, Hedwigia 48: 145. 1908.
Sori in ovaries, oblong to oval, pointed, with styles and delicate ovary-walls usually intact, 3-4 mm. in length, chiefly hidden by the enveloping glumes, infecting all of the spikelets; sterile hyaline cells occasional, subspheric, with moderately thick and smooth walls, considerably smaller than the spores; spores usually golden-yellow (in European specimens sometimes mixed with others having a purplish tint), subspheric to spheric or occasionally more elongate, with prominent regular reticulations about 2-4 in in diameter and extending 1-2 m beyond the margin, 20-26 n in length, or more elongate rarely iO n.
On Poaceae:
Bromus mollis (B. hordeaceus) , Idaho, Washington.
Bromus racemosus (B. hordeaceus var. glabrescens) , Idaho, Washington.
Bromus sp.. California. Type locautv: Gye-sur-Seine, Aube, France, on Bromus ereclus. DisTRiBUTio.N : Western United States; also in Europe and Asia.