Moreaua lepidospermatis (McAlpine) Vánky (as "lepidospermae")

Synonyms

Thecaphora lepidospermae (McAlpine) Thirum. & Neerg.
Tolyposporium lepidospermae McAlpine

Description

Sori in the spikelets completely hidden by the floral envelopes, forming a black granular-powdery mass of spore balls around the inner floral organs. Infection systemic; all spikelets of an inflorescence affected and becoming slightly swollen.

Spore balls subglobose, ovoid to slightly irregular, (25–) 30–60 × (20–) 25–45 (–50) µm, reddish or blackish brown to opaque, composed of (3–) 6–30 (or more?) firmly cohering spores.

Spores irregular with a rounded free surface and flattened contact sides, 12–18 × 12–16 µm, reddish to chestnut-brown; wall of the free surface 2.5–3.0 µm thick, densely irregularly and coarsely verrucose; wall of the contact sides c. 0.5 µm thick, smooth.

Hosts
   
Host family: Cyperaceae
   
Host species: Lepidosperma angustatum R.Br.
Lepidosperma concavum R.Br.
Lepidosperma gunnii Boeck.
Lepidosperma semiteres F.Muell. ex Boeck.
Ptilothrix deusta (R.Br.) K.L.Wilson

Distribution

States & Territories: NSW, QLD, TAS, VIC, WA