Restiosporium eurychordae Vánky

Description

Sori in all capsules of an inflorescence, rounded, flattened, 1.0–1.5 mm diam., hidden by the floral envelopes, filled with a dark blackish brown semi-agglutinated to granular-powdery mass of spore balls and spores.

Spore balls globose, ovoid, ellipsoidal to irregular, 50–100 (–140) × 30–80 µm, olivaceous brown to subopaque, composed of tens of loosely connected spores that separate readily by pressure.

Spores globose, ovoid, ellipsoidal, elongate, usually subpolyhedrally irregular, rarely with short acute tips at the angles, 11–20 (–24) × 9.0–13.5 (–14.5) µm, medium dark olivaceous brown; wall uniformly thick or slightly uneven, 1.0–2.0 (–2.5) µm thick; in LM smooth, in SEM finely low-verruculose, especially on the free surface.

Hosts
   
Host family: Restionaceae
   
Host species: Eurychorda complanata (R.Br.) B.G.Briggs & L.A.S.Johnson

Distribution

States & Territories: QLD, TAS