Anthracocystis normanensis (R.G. Shivas & Vánky) McTaggart & R.G. Shivas

Synonyms

Sporisorium normanense R.G. Shivas & Vánky (as "normanensis")

Description

Sori destroying the entire inflorescence, cylindrical, tapering at the apex, partially concealed by the leaf sheaths, 5–20 mm long, 1–3 mm wide, at first covered by a thick yellowish brown peridium that ruptures irregularly exposing a black granular-powdery mass of spore balls and several filiform columellae. All inflorescences on an infected plant are affected.

Spore balls globose, ovoid, elongate or slightly irregular, 25–160 × 15–90 µm, reddish brown to subopaque, composed of 10 to hundreds of spores that separate readily by pressure.

Spores subglobose, ellipsoidal to subpolyhedrally irregular, 8–12 × 7.0–10.5 µm, reddish brown; wall slightly uneven, c. 0.5–1.0 µm thick, thickest at the angles and at the free surface of the spores, densely verruculose-echinulate on the free surface, finely punctate-verruculose on the contact sides; spore profile smooth.

Sterile cells few, in irregular groups or chains; individual cells subglobose, ellipsoidal, subcylindrical or slightly irregular, 5–18 µm long, subhyaline; wall 0.5–2.0 µm thick, smooth.

Hosts
   
Host family: Poaceae
   
Host species: Cynodon dactylon (L.) Pers.

Distribution

States & Territories: QLD