Moreaua schoeni (Vánky & McKenzie) Vánky

Synonyms

Tolyposporium schoeni Vánky & McKenzie

Description

Sori in the flowers, completely hidden by the floral envelopes, the black initially agglutinated, later granular-powdery mass of spore balls covering the surface of the proximal part of the filaments and also filling the aborted and deformed nuts which split longitudinally early on; layer of sporogenous hyphae apparently absent.

Spore balls ovoid, elongate or irregular, 60–120 (–150) × 50–90 µm, dark reddish brown to blackish brown, opaque, composed of many (c. 80 to several hundred) firmly cohering spores; interior of large spore balls empty, or the central cavity filled with smooth loosely arranged globose spores.

Spores subpyramidal, wedge-shaped to irregularly elongate, 12–30 (–35) µm long, reddish to light blackish brown; wall of the free outer surface polygonal, 8–16 × (6.5–) 8–12 µm, slightly convex, 1–3 µm thick, with low irregular often confluent warts; wall of the contact side thinner, 0.5–1.0 µm, smooth, but the free surface in the cavity 1–2 µm thick, smooth or verrucose.

Spore germination resulting in septate basidia producing whorls of sessile ovoid basidiospores at the septa and on the apices of the basidia; sterigmata lacking. Basidiospores germinating as yeast cells, 5.5–9.5 × 1.5–4.0 µm.

Hosts
   
Host family: Cyperaceae
   
Host species: Schoenus brevifolius R.Br.
Schoenus melanostachys R.Br.

Distribution

States & Territories: NSW, VIC