Sporisorium sahayai (Mundk.) Vánky


Sphacelotheca sahayai Mundk.


Sori destroying all innermost floral organs (including the ovaries) of an inflorescence, ellipsoidal, 2–3 mm long, at first hidden, later visible between the spreading glumes, covered by a delicate peridium that flakes away exposing the blackish brown semi-agglutinated mass of spores and sterile cells surrounding a well-developed columella.

Spores when mature solitary, globose, subglobose, broadly ellipsoidal to slightly irregular, 10.5–14.0 × 9.0–13.5 µm, dark yellowish brown; wall 1–2 µm thick, prominently and rather densely echinulate; spore profile serrulate.

Sterile cells in small irregular groups, in short chains or solitary, globose, ellipsoidal to irregular, with flattened contact sides, 7–13 µm long, subhyaline or with a pale yellowish brown tint; wall 0.5–1.0 µm thick, smooth.

Host family: Poaceae
Host species: Dichanthium sericeum (R.Br.) A.Camus subsp. sericeum


States & Territories: NSW, QLD