Moreaua gahniae (Vánky & C. Vánky) Vánky

Synonyms

Tolyposporium gahniae Vánky & C. Vánky

Description

Sori in spikelets, hidden by the elongate and deformed floral envelopes; aborted swollen spikelets are filled with a black initially agglutinated, later granular-powdery mass of spore balls. Infection systemic; all spikelets of an inflorescence affected.

Spore balls subglobose, ovoid, ellipsoidal, oblong or slightly irregular, 30–80 (–110) × 25–70 (–90) µm, dark reddish brown or opaque, composed of 10 to numerous loosely agglomerated spores that separate with difficulty by pressure.

Spores globose, subglobose, ellipsoidal, rarely hemispherical or irregular, with 1–2 flattened sides, or subcuneiform, 11.0–17.5 × 8.0–13.5 µm, radially 9.5–16.0 (–18) µm, reddish brown; wall of the free surface 1.0–1.5 µm thick, including the sparse low warts; wall of the contact sides c. 0.5 µm thick, smooth.

Hosts
   
Host family: Cyperaceae
   
Host species: Gahnia radula (R.Br.) Benth.

Distribution

States & Territories: TAS