Ustilago schmidtiae Vánky


Sori in some ovaries of an inflorescence, completely hidden by the lemma and palea, ovoid, c. 2–3.0 mm long and 1.5 mm wide, dark brown, covered by a thin membrane of the pericarp which ruptures exposing the blackish brown, at first semi-agglutinated, later powdery mass of spores.

Spores globose, subglobose, ovoid to ellipsoidal, 9–12 × 8.0–10.5 µm, medium reddish brown; wall uniformly thin (c. 0.7 µm), moderately densely and uniformly finely echinulate, giving a finely serrulate spore profile. Columella and sterile cells between the spores absent.

Host family: Poaceae
Host species: Enneapogon polyphyllus (Domin) N.T.Burb.
Enneapogon purpurascens (R.Br.) P.Beauv


States & Territories: NT, WA


The spores of U. schmidtiae are less obviously echinulate on Enneapogon purpurascens than on E. polyphyllus, even when found at the same location.