Anthracocystis andropogonis-aciculati (Petch) McTaggart & R.G. Shivas

Synonyms

Sorosporium andropogonis-aciculati (Petch) Petch
Sporisorium andropogonis-aciculati (Petch) Vánky
Ustilago andropogonis-aciculati Petch

Description

Sori destroying the entire inflorescence, long-cylindrical, 20–40 (–50) mm long, 1–2 mm wide, hidden by the uppermost leaf sheath, at first covered by a pale brown peridium that ruptures irregularly from its apex exposing the blackish brown granular-powdery mass of spore balls and several long filiform columellae.

Spore balls subglobose, ellipsoidal to slightly irregular, 20–60 × 20–50 µm, dark reddish brown to opaque, composed of tens or hundreds of spores that separate by pressure.

Spores globose, subglobose, ellipsoidal to slightly irregular, 5.0–6.5 × 4–5 µm, yellowish brown, somewhat paler on one side; wall uneven, 0.5–1.0 µm thick, apparently smooth to very finely punctate, in SEM finely and moderately densely verruculose.

Sterile cells absent.

Hosts
   
Host family: Poaceae
   
Host species: Chrysopogon aciculatus (Retz.) Trin.

Distribution

States & Territories: NT, QLD