Triodiomyces lunatus (R.G. Shivas, McTaggart & Vánky) McTaggart & R.G. Shivas


Ustilago lunata R.G. Shivas, McTaggart & Vánky


Sori around the floral stem and inflorescence, long, cylindrical, c. 100 mm long and 1–2 mm wide; also minute blister-like sori at the apex of the pedicels and base of the glumes; also on the outer leaf surface of the leaf surrounding the inflorescence; at first covered by a silvery membrane of host origin which ruptures irregularly and flakes away exposing the dark brown initially agglutinated, later powdery mass of spores.

Spores globose,subglobose orbroadly ellipsoidal, 5.0–7.5 (–8.0) × 4.5–7.0 µm, yellowish brown; wall uneven, 0.5–0.8 µm thick, thinner on the paler side, sparsely and distinctly verrucose which just affects the spore profile, especially on the paler side.

Spore germination not known.

Host family: Poaceae
Host species: Triodia longiceps J.M.Black


States & Territories: WA


Triodiomyces lunatus differs from T. triodiae, and also from all other Triodiomyces species on Triodia, by having smaller spores that are paler on one side, and sparsely but distinctly verrucose.