Sporisorium dinteri (Syd. & P. Syd.) Vánky

Synonyms

Sphacelotheca dinteri (Syd. & P. Syd.) Zundel
Ustilago dinteri Syd. & P. Syd.

Description

Sori destroying the entire inflorescence, partly hidden by the terminal leaf sheath, long-linear, 15–60 mm long, covered by a thick pale brown peridium that flakes away exposing the dark brown semi-powdery mass of spores and sterile cells surrounding a well-formed simple or branched columella.

Spores globose, subglobose, ellipsoidal, frequently rounded-subpolyhedral, 10.5–14.0 × 9–12 µm, yellowish brown; wall uniformly 0.8–1.0 µm thick, minutely and densely echinulate; spore profile wavy to finely serrulate.

Sterile cells in irregular groups; individual cells 7–13 (–16) µm long, subhyaline, collapsed in old specimens; wall 0.5–0.8 µm thick, smooth.

Hosts
   
Host family: Poaceae
   
Host species: Bothriochloa bladhii (Retz.) S.T.Blake subsp. bladhii
Dichanthium fecundum S.T.Blake

Distribution

States & Territories: QLD, WA

Comments

The sori of S. dinteri destroy the entire inflorescence and, in this regard, it is similar to S. andropogonis, S. doidgeae and S. tenue which also occur on Bothriochloa and Dichanthium (Vánky, 2004). However, S. dinteri has spores that are somewhat larger.