Sporisorium moniliferum (Ellis & Everh.) L. Guo

Synonyms

Sphacelotheca ischaemi (Fuckel) G.P. Clinton f. heteropogonis Bacc.
Sphacelotheca monilifera (Ellis & Everh.) G.P. Clinton
Sphacelotheca warneckeana (Henn.) Zundel
Ustilago andropogonis-contorti Henn.
Ustilago monilifera Ellis & Everh.
Ustilago warneckeana Henn.

Description

Sori in all ovaries of a raceme, often also occupying the innermost floral envelopes, short-cylindrical, 3–6 mm long, c. 1 mm wide, ±concealed by the glumes, at first covered by a dark brown leathery peridium that ruptures from its apex exposing the initially agglutinated later powdery mass of spores and sterile cells surrounding a simple tapering central columella.

Spore balls loose, composed of a great number of readily separating spores.

Spores globose, broadly ellipsoidal to slightly irregular, 9.0–12.5 × 8–11 µm, yellowish or reddish brown; wall uniformly c. 1 µm thick, densely and finely echinulate; spore profile finely serrulate.

Sterile cells in irregular groups; individual cells globose, ellipsoidal or irregular, 8–16 µm long, subhyaline to pale yellowish brown; wall c. 0.5 µm thick, smooth.

Hosts
   
Host family: Poaceae
   
Host species: Heteropogon contortus (L.) P.Beauv. ex Roem. & Schult.

Distribution

States & Territories: NSW, NT, QLD, WA

Comments

Sporisorium moniliferum is one of four species of Sporisorium on Heteropogon contortus in Australia. It is very common in northern Queensland.