Anthracocystis cenchri-elymoidis (Vánky & R.G. Shivas) McTaggart & R.G. Shivas

Synonyms

Sporisorium cenchri-elymoidis Vánky & R.G. Shivas

Description

Sori in the spikelets infecting 1 or several in the burrs (clusters of spikelets), cylindrical, 8–15 mm long, 1.0–1.5 mm wide, at first covered by a greyish brown peridium that ruptures from its apex exposing the blackish brown, initially agglutinated later powdery mass of loose spore balls and spores surrounding a well-developed tapering central columella up to 25 mm long.

Spore balls variable, dark yellowish brown, composed of many readily separating spores.

Spores subpolyhedrally or polyhedrally irregular, more rarely globose or ellipsoidal, 8–12 × 7.0–9.5 µm, yellowish brown; wall slightly unevenly thick, 0.5–1.0 µm, somewhat thicker at the angles and with several rounded thinner areas that appear as depressions under SEM; surface very finely densely punctate-verruculose; spore profile smooth.

Sterile cells not seen.

Hosts
   
Host family: Poaceae
   
Host species: Cenchrus elymoides F.Muell.
Cenchrus elymoides var. brevisetosus B.K.Simon

Distribution

States & Territories: WA