Tilletia cape-yorkensis Vánky & R.G. Shivas

Description

Sori in some ovaries of an inflorescence, forming swollen broadly fusiform or obovoid brown bodies, with a narrow basal part and a shortly apiculate tip, more rarely lemon-shaped, 3–8 mm long, 1–2 mm wide, covered by the thick pericarp that ruptures longitudinally at maturity exposing the black semi-agglutinated to powdery mass of spores mixed with sterile cells.

Spores globose, subglobose to usually broadly ellipsoidal or ovoid, 24–32 (–40) × (20–) 23–28 (–32) µm, medium yellowish to medium reddish brown, never opaque; wall uniformly 3.5–4.5 µm thick, including the 3–4 µm high conical or cylindrical scale-like projections with flattened blunt or subacute tips; in surface view the ornamentation gives an irregularly finely to rather coarsely reticulate pattern with dark polygonal areas, 8–13 per spore diameter.

Sterile cells subglobose, ovoid, ellipsoidal to slightly irregular, 16–28 µm long, pale yellowish brown; wall (1–) 2–4 (–5) µm thick, smooth, but also punctate or verrucose (immature spores), rarely with a small appendage.

Hosts
   
Host family: Poaceae
   
Host species: Whiteochloa airoides (R.Br.) Lazarides

Distribution

States & Territories: QLD