Restiosporium meneyae Vánky

Description

Sori inconspicuous, filling the capsules with a black granular-powdery mass of spore balls; infected male plants developing gynoecia with sori (transvestism). Infection systemic; all flowers of a plant affected; infected capsules smaller and more numerous per culm than those of healthy female plants.

Spore balls ovoid, elongate or irregular, 50–100 (–120) × 40–70 (–80) µm, dark olivaceous brown, composed of tens to hundreds of readily separating spores, developing from concentrated groups of sporogenous hyphae within a hyaline mass of hyphae.

Spores subglobose, ovoid or elongate, usually subpolyhedrally or polyhedrally irregular, 9–14 × 7–10 µm, olivaceous brown; wall uniformly 0.5–1.0 µm thick, apparently smooth; in LM often with acute edges showing as lines when the spores are seen in surface view.

Hosts
   
Host family: Restionaceae
   
Host species: Lyginia barbata (Labill.) R.Br.

Distribution

States & Territories: WA