Tilletia vittata (Berk.) Mundk.

Synonyms

Neovossia vittata (Berk.) Shetty & Safeeulla
Tilletia panici Mundk.
Tilletia vittata var. burmannii Mishra
Ustilago vittata Berk.

Description

Sori in scattered hypertrophied ovaries, cylindrical, usually slightly bent, 3–15 (–20) mm long, 1–2 mm wide, covered by a hispid membrane of host origin with parallel veins. At maturity the membrane ruptures longitudinally, sometimes in several places, exposing the black powdery mass of spores mixed with sterile cells.

Spores globose to subglobose, 15–21 × 14–19 µm, smoky-brown, chocolate-brown to subopaque; wall 1.5–2.0 µm thick, with rather densely and somewhat irregularly situated 1.0–1.5 µm high warts embedded in a thin hyaline sheath; warts solitary or forming short irregular chains but not clustered, 13–19 per spore diameter; in optical median view 38–53 on the equatorial circumference, with acute, subacute or flattened tips.

Sterile cells subglobose, ovoid to slightly irregular, 9–19 × 9–17 µm, pale olivaceous brown; wall 1.0–2.5 µm thick, smooth, indistinctly or finely verruculose (immature spores).

Hosts
   
Host family: Poaceae
   
Host species: Oplismenus hirtellus (L.) P.Beauv.

Distribution

States & Territories: QLD