Tilletia shivasii Vánky


Sori in some ovaries of an inflorescence, ovoid, 1.5–2.0 mm long, 0.8–1.0 mm wide, visible between the spreading floral envelopes, at first covered by a smooth pale brown peridium of host origin which ruptures irregularly exposing the black semi-agglutinated to powdery mass of spores and sterile cells.

Spores globose, subglobose to broadly ellipsoidal, 30–40 × 28–36 µm, dark chocolate-brown to opaque, with coarse 3.5–6.5 µm long irregularly cylindrical projections; in surface view visible as dark irregular polygonal spots, 8–10 per spore diameter; in optical median view appearing cylindrical, with rounded flattened or slightly widened tips, 28–40 on the equatorial circumference.

Sterile cells globose, ovoid, ellipsoidal to slightly irregular, 13.5–29.0 × 12–28 µm, pale olivaceous brown; wall uniformly 2.5–6.0 µm thick, multilayered, smooth or verruculose, often with a short hyphal appendage.

Host family: Poaceae
Host species: Arundinella nepalensis Trin.


States & Territories: NT