Moreaua muelleriana (Thüm.) Vánky

Synonyms

Sorosporium muellerianum Thüm.
Thecaphora muelleriana (Thüm.) Thirum. & Neerg. (as "muellerianum")
Tolyposporium muellerianum (Thüm.) McAlpine

Description

Sori in the spikelets, hidden by the elongate and deformed floral envelopes; aborted spikelets 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–) 40–100 × (30–) 35–65 (–80) µm, dark reddish to blackish brown or opaque, composed of numerous firmly cohering spores.

Spores subcuneiform or subpolyhedrally irregular with flattened contact sides, on the free surface 10–16 (–18) × 7–13 µm, radially (8–) 10–16 (–18) µm long, dark reddish or blackish brown; wall of the free surface 2–4 µm thick, including the irregular confluent low warts, wall of the contact sides 0.5–1.0 µm thick, smooth.

Hosts
   
Host family: Cyperaceae
   
Host species: Gahnia trifida Labill.

Distribution

States & Territories: TAS, VIC