Restiosporium pallentis Vánky & R.G. Shivas

Description

Sori in all capsules of an inflorescence, c. 1.0–1.2 mm long and 0.8 mm wide, hidden by the floral envelopes, filled with a black semi-agglutinated to powdery mass of spore balls.

Spore balls globose, ovoid, slightly irregular or rarely elongate, 30–90 (–100) × 30–70 µm, dark reddish brown to opaque, composed of tens to 100(?) readily separating spores.

Spores subpolyhedrally to polyhedrally irregular, rarely ellipsoidal, often with 1 or several subacute tips, 9–16 (–17.5) × 7–11 µm, medium dark olivaceous brown; wall uneven, 0.5–1.0 µm thick, thickest at the angles, often with 1–3 acute lines along the flattened sides, smooth; in SEM free surface rough.

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

Distribution

States & Territories: QLD

Comments

Restiosporium pallentis differs from R. baloskionis in having smaller spore balls and smaller subpolyhedral or polyhedral spores with unevenly thickened walls.