Tilletia eragrostidis G.P. Clinton & Ricker


Sori in some ovaries of an inflorescence, visible between the spreading floral envelopes as inconspicuous ovoid bodies 0.8–1.4 mm long and 0.3–0.8 mm wide, at first covered by the thin pericarp that ruptures irregularly to expose the blackish brown semi-agglutinated to powdery mass of spores and sterile cells.

Spores globose, subglobose, ovoid to ellipsoidal, 28–40 × 25–36 µm, yellowish to dark reddish brown, opaque in some collections; wall 3.5–7.0 µm thick, including the 2.5–5.5 µm high truncate warts that appear, in surface view, as darker densely arranged irregularly polygonal areas, 6–10 per spore diameter.

Sterile cells globose, ellipsoidal to irregularly polyhedral, 16–30 × 14–25 µm, subhyaline to pale yellowish brown; wall 3–5 µm thick, smooth to finely punctate.

Host family: Poaceae
Host species: Eragrostis tenellula (Kunth) Steudel


States & Territories: QLD


Tilletia eragrostidis is likely to be more widespread in Australia as the sori are inconspicuous and difficult to detect.